./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 51aa0675891000edd5d1736f3584d06816ce7050b76c01d5b217260a35077c25 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:35:37,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:35:37,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:35:37,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:35:37,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:35:37,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:35:37,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:35:37,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:35:37,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:35:37,916 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:35:37,917 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:35:37,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:35:37,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:35:37,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:35:37,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:35:37,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:35:37,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:35:37,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:35:37,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:35:37,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:35:37,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:35:37,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:35:37,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:35:37,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:35:37,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:35:37,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:35:37,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:35:37,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:35:37,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:35:37,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:35:37,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:35:37,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:35:37,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:35:37,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:35:37,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:35:37,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:35:37,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:35:37,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:35:37,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:35:37,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:35:37,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:35:37,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 19:35:37,970 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:35:37,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:35:37,971 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:35:37,971 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:35:37,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:35:37,972 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:35:37,973 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:35:37,973 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:35:37,973 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:35:37,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:35:37,974 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:35:37,974 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:35:37,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:35:37,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:35:37,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:35:37,974 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:35:37,974 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:35:37,975 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 19:35:37,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:35:37,975 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:35:37,975 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:35:37,975 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:35:37,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:35:37,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:35:37,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:35:37,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:35:37,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:35:37,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:35:37,976 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 19:35:37,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 19:35:37,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:35:37,977 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51aa0675891000edd5d1736f3584d06816ce7050b76c01d5b217260a35077c25 [2021-12-18 19:35:38,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:35:38,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:35:38,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:35:38,212 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:35:38,213 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:35:38,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2021-12-18 19:35:38,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/178b0476e/78480d529f814237995ca63da2a7fd37/FLAG89ac5256d [2021-12-18 19:35:38,831 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:35:38,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrncmp-alloca-1.i [2021-12-18 19:35:38,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/178b0476e/78480d529f814237995ca63da2a7fd37/FLAG89ac5256d [2021-12-18 19:35:39,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/178b0476e/78480d529f814237995ca63da2a7fd37 [2021-12-18 19:35:39,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:35:39,306 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:35:39,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:35:39,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:35:39,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:35:39,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:35:39" (1/1) ... [2021-12-18 19:35:39,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7955234b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:39, skipping insertion in model container [2021-12-18 19:35:39,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:35:39" (1/1) ... [2021-12-18 19:35:39,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:35:39,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:35:39,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:35:39,657 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:35:39,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:35:39,706 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:35:39,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:39 WrapperNode [2021-12-18 19:35:39,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:35:39,707 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:35:39,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:35:39,709 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:35:39,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:39" (1/1) ... [2021-12-18 19:35:39,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:39" (1/1) ... [2021-12-18 19:35:39,756 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 114 [2021-12-18 19:35:39,756 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:35:39,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:35:39,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:35:39,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:35:39,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:39" (1/1) ... [2021-12-18 19:35:39,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:39" (1/1) ... [2021-12-18 19:35:39,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:39" (1/1) ... [2021-12-18 19:35:39,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:39" (1/1) ... [2021-12-18 19:35:39,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:39" (1/1) ... [2021-12-18 19:35:39,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:39" (1/1) ... [2021-12-18 19:35:39,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:39" (1/1) ... [2021-12-18 19:35:39,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:35:39,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:35:39,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:35:39,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:35:39,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:39" (1/1) ... [2021-12-18 19:35:39,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:35:39,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:39,873 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) [2021-12-18 19:35:39,892 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 [2021-12-18 19:35:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 19:35:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 19:35:39,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 19:35:39,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:35:39,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:35:39,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:35:39,978 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:35:39,979 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:35:40,126 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:35:40,132 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:35:40,132 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-18 19:35:40,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:35:40 BoogieIcfgContainer [2021-12-18 19:35:40,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:35:40,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:35:40,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:35:40,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:35:40,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:35:39" (1/3) ... [2021-12-18 19:35:40,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be17efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:35:40, skipping insertion in model container [2021-12-18 19:35:40,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:39" (2/3) ... [2021-12-18 19:35:40,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be17efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:35:40, skipping insertion in model container [2021-12-18 19:35:40,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:35:40" (3/3) ... [2021-12-18 19:35:40,148 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrncmp-alloca-1.i [2021-12-18 19:35:40,151 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:35:40,151 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-12-18 19:35:40,188 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:35:40,196 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 [2021-12-18 19:35:40,196 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-12-18 19:35:40,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 37 states have (on average 1.864864864864865) internal successors, (69), 56 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) [2021-12-18 19:35:40,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:35:40,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:40,217 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:40,218 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:40,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-18 19:35:40,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:40,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862171574] [2021-12-18 19:35:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:40,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:40,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:40,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862171574] [2021-12-18 19:35:40,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862171574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:40,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:40,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:40,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969283057] [2021-12-18 19:35:40,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:40,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:40,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:40,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:40,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:40,485 INFO L87 Difference]: Start difference. First operand has 57 states, 37 states have (on average 1.864864864864865) internal successors, (69), 56 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) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:40,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:40,529 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2021-12-18 19:35:40,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:40,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 19:35:40,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:40,539 INFO L225 Difference]: With dead ends: 106 [2021-12-18 19:35:40,540 INFO L226 Difference]: Without dead ends: 102 [2021-12-18 19:35:40,542 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 [2021-12-18 19:35:40,547 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 55 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:40,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 175 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:40,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-18 19:35:40,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 58. [2021-12-18 19:35:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 57 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) [2021-12-18 19:35:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2021-12-18 19:35:40,581 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 7 [2021-12-18 19:35:40,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:40,582 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2021-12-18 19:35:40,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:40,582 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2021-12-18 19:35:40,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:35:40,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:40,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:40,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 19:35:40,583 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:40,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:40,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-18 19:35:40,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:40,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765132358] [2021-12-18 19:35:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:40,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:40,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:40,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765132358] [2021-12-18 19:35:40,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765132358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:40,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:40,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:35:40,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386452455] [2021-12-18 19:35:40,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:40,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:35:40,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:40,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:35:40,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:40,666 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. 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) [2021-12-18 19:35:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:40,693 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-12-18 19:35:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:35:40,694 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 [2021-12-18 19:35:40,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:40,695 INFO L225 Difference]: With dead ends: 56 [2021-12-18 19:35:40,695 INFO L226 Difference]: Without dead ends: 56 [2021-12-18 19:35:40,695 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 [2021-12-18 19:35:40,696 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:40,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 46 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:40,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-18 19:35:40,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-18 19:35:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 55 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) [2021-12-18 19:35:40,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-12-18 19:35:40,701 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 7 [2021-12-18 19:35:40,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:40,701 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-12-18 19:35:40,701 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) [2021-12-18 19:35:40,702 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-12-18 19:35:40,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:35:40,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:40,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:40,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 19:35:40,703 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:40,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:40,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-18 19:35:40,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:40,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468546058] [2021-12-18 19:35:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:40,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:40,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:40,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468546058] [2021-12-18 19:35:40,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468546058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:40,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:40,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:40,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495731217] [2021-12-18 19:35:40,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:40,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:40,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:40,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:40,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:40,777 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:40,905 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2021-12-18 19:35:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:40,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 19:35:40,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:40,911 INFO L225 Difference]: With dead ends: 103 [2021-12-18 19:35:40,911 INFO L226 Difference]: Without dead ends: 103 [2021-12-18 19:35:40,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:40,912 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 55 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:40,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 115 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-18 19:35:40,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 58. [2021-12-18 19:35:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 57 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) [2021-12-18 19:35:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-12-18 19:35:40,932 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 7 [2021-12-18 19:35:40,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:40,933 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-12-18 19:35:40,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:40,933 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-12-18 19:35:40,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:35:40,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:40,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:40,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 19:35:40,934 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:40,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:40,935 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-18 19:35:40,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:40,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526498059] [2021-12-18 19:35:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:40,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:40,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:40,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526498059] [2021-12-18 19:35:40,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526498059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:40,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:40,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:40,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892713570] [2021-12-18 19:35:40,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:40,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:40,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:40,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:40,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:40,990 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:41,056 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-12-18 19:35:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:41,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-18 19:35:41,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:41,057 INFO L225 Difference]: With dead ends: 57 [2021-12-18 19:35:41,057 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 19:35:41,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:41,059 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 56 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:41,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 44 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 19:35:41,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-18 19:35:41,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 56 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) [2021-12-18 19:35:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2021-12-18 19:35:41,072 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 9 [2021-12-18 19:35:41,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:41,073 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2021-12-18 19:35:41,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,087 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2021-12-18 19:35:41,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:35:41,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:41,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:41,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 19:35:41,089 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:41,089 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-18 19:35:41,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:41,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545895087] [2021-12-18 19:35:41,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:41,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:41,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:41,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545895087] [2021-12-18 19:35:41,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545895087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:41,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:41,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:41,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406484010] [2021-12-18 19:35:41,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:41,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:41,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:41,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:41,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:41,198 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:41,239 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2021-12-18 19:35:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:41,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-18 19:35:41,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:41,242 INFO L225 Difference]: With dead ends: 104 [2021-12-18 19:35:41,244 INFO L226 Difference]: Without dead ends: 104 [2021-12-18 19:35:41,244 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 [2021-12-18 19:35:41,245 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 88 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:41,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 116 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-18 19:35:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2021-12-18 19:35:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 67 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-12-18 19:35:41,260 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 9 [2021-12-18 19:35:41,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:41,260 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-12-18 19:35:41,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,261 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-12-18 19:35:41,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:35:41,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:41,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:41,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 19:35:41,264 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:41,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:41,266 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-18 19:35:41,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:41,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61077428] [2021-12-18 19:35:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:41,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:41,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:41,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61077428] [2021-12-18 19:35:41,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61077428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:41,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:41,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:35:41,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636889989] [2021-12-18 19:35:41,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:41,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:35:41,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:41,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:35:41,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:41,347 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:41,389 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2021-12-18 19:35:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:35:41,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-18 19:35:41,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:41,391 INFO L225 Difference]: With dead ends: 66 [2021-12-18 19:35:41,391 INFO L226 Difference]: Without dead ends: 66 [2021-12-18 19:35:41,391 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 [2021-12-18 19:35:41,394 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:41,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 45 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-18 19:35:41,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-18 19:35:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 65 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2021-12-18 19:35:41,406 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 9 [2021-12-18 19:35:41,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:41,406 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2021-12-18 19:35:41,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2021-12-18 19:35:41,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 19:35:41,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:41,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:41,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 19:35:41,408 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:41,408 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-18 19:35:41,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:41,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208567824] [2021-12-18 19:35:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:41,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:41,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:41,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208567824] [2021-12-18 19:35:41,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208567824] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:41,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:41,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:41,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114722749] [2021-12-18 19:35:41,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:41,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:41,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:41,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:41,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:41,546 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:41,607 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2021-12-18 19:35:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:41,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-18 19:35:41,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:41,608 INFO L225 Difference]: With dead ends: 104 [2021-12-18 19:35:41,608 INFO L226 Difference]: Without dead ends: 104 [2021-12-18 19:35:41,608 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 [2021-12-18 19:35:41,609 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 139 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:41,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 106 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:41,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-18 19:35:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2021-12-18 19:35:41,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.537037037037037) internal successors, (83), 67 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2021-12-18 19:35:41,613 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 9 [2021-12-18 19:35:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:41,614 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2021-12-18 19:35:41,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2021-12-18 19:35:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:35:41,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:41,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:41,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 19:35:41,615 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:41,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:41,615 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-18 19:35:41,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:41,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801256581] [2021-12-18 19:35:41,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:41,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:41,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:41,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801256581] [2021-12-18 19:35:41,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801256581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:41,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:41,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:41,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931950743] [2021-12-18 19:35:41,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:41,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:41,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:41,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:41,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:41,674 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:41,704 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2021-12-18 19:35:41,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:41,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-18 19:35:41,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:41,705 INFO L225 Difference]: With dead ends: 67 [2021-12-18 19:35:41,705 INFO L226 Difference]: Without dead ends: 67 [2021-12-18 19:35:41,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:41,706 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 99 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:41,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 41 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:41,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-18 19:35:41,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-18 19:35:41,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 66 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2021-12-18 19:35:41,711 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 10 [2021-12-18 19:35:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:41,712 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2021-12-18 19:35:41,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2021-12-18 19:35:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 19:35:41,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:41,715 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:41,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 19:35:41,715 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:41,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-18 19:35:41,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:41,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790123044] [2021-12-18 19:35:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:41,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:41,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:41,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790123044] [2021-12-18 19:35:41,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790123044] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:41,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880554186] [2021-12-18 19:35:41,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:41,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:41,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:41,818 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) [2021-12-18 19:35:41,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 19:35:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:41,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:35:41,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:41,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:35:41,946 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 [2021-12-18 19:35:41,964 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 [2021-12-18 19:35:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:42,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:42,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880554186] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:42,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:42,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-18 19:35:42,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420669562] [2021-12-18 19:35:42,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:42,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:35:42,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:42,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:35:42,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:35:42,575 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:42,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:42,773 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2021-12-18 19:35:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:35:42,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-18 19:35:42,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:42,774 INFO L225 Difference]: With dead ends: 158 [2021-12-18 19:35:42,774 INFO L226 Difference]: Without dead ends: 158 [2021-12-18 19:35:42,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:35:42,775 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 277 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:42,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 326 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:42,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-18 19:35:42,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 62. [2021-12-18 19:35:42,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.48) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2021-12-18 19:35:42,778 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 11 [2021-12-18 19:35:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:42,779 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-12-18 19:35:42,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2021-12-18 19:35:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 19:35:42,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:42,786 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:42,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:42,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:42,987 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:42,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:42,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-18 19:35:42,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:42,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694179265] [2021-12-18 19:35:42,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:42,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:43,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:43,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694179265] [2021-12-18 19:35:43,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694179265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:43,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044132913] [2021-12-18 19:35:43,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:43,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:43,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:43,065 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) [2021-12-18 19:35:43,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 19:35:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:43,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:35:43,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:43,145 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:35:43,146 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 [2021-12-18 19:35:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:43,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:43,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044132913] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:43,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:43,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-18 19:35:43,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37858911] [2021-12-18 19:35:43,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:43,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 19:35:43,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:43,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 19:35:43,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:35:43,497 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 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) [2021-12-18 19:35:43,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:43,691 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2021-12-18 19:35:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:35:43,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 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 13 [2021-12-18 19:35:43,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:43,693 INFO L225 Difference]: With dead ends: 130 [2021-12-18 19:35:43,693 INFO L226 Difference]: Without dead ends: 130 [2021-12-18 19:35:43,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:35:43,694 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 372 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:43,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 302 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:43,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-18 19:35:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 59. [2021-12-18 19:35:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 58 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) [2021-12-18 19:35:43,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-12-18 19:35:43,702 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 13 [2021-12-18 19:35:43,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:43,702 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-12-18 19:35:43,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 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) [2021-12-18 19:35:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-12-18 19:35:43,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 19:35:43,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:43,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:43,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:43,924 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,SelfDestructingSolverStorable9 [2021-12-18 19:35:43,928 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:43,928 INFO L85 PathProgramCache]: Analyzing trace with hash 172810813, now seen corresponding path program 1 times [2021-12-18 19:35:43,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:43,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012304647] [2021-12-18 19:35:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:43,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:44,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:44,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012304647] [2021-12-18 19:35:44,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012304647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:44,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:44,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:44,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574190493] [2021-12-18 19:35:44,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:44,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:44,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:44,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:44,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:44,030 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:44,085 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-12-18 19:35:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:44,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-18 19:35:44,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:44,086 INFO L225 Difference]: With dead ends: 58 [2021-12-18 19:35:44,086 INFO L226 Difference]: Without dead ends: 53 [2021-12-18 19:35:44,087 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 [2021-12-18 19:35:44,087 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 42 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:44,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 76 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-18 19:35:44,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-18 19:35:44,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-18 19:35:44,095 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 14 [2021-12-18 19:35:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:44,095 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-18 19:35:44,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-18 19:35:44,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 19:35:44,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:44,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:44,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 19:35:44,096 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1062175016, now seen corresponding path program 1 times [2021-12-18 19:35:44,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:44,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010899522] [2021-12-18 19:35:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:44,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:44,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:44,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010899522] [2021-12-18 19:35:44,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010899522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:44,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:44,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:44,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708124127] [2021-12-18 19:35:44,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:44,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:44,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:44,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:44,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:44,134 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:44,161 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-12-18 19:35:44,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:44,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-18 19:35:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:44,162 INFO L225 Difference]: With dead ends: 50 [2021-12-18 19:35:44,162 INFO L226 Difference]: Without dead ends: 50 [2021-12-18 19:35:44,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:44,163 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:44,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 46 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:44,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-18 19:35:44,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-18 19:35:44,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-12-18 19:35:44,167 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 15 [2021-12-18 19:35:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:44,168 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-12-18 19:35:44,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-12-18 19:35:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 19:35:44,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:44,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:44,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-18 19:35:44,170 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:44,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1062175017, now seen corresponding path program 1 times [2021-12-18 19:35:44,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:44,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420423688] [2021-12-18 19:35:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:44,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:44,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:44,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420423688] [2021-12-18 19:35:44,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420423688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:44,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:44,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:35:44,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177809319] [2021-12-18 19:35:44,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:44,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:35:44,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:44,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:35:44,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:35:44,387 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:44,572 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-12-18 19:35:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:44,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-18 19:35:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:44,573 INFO L225 Difference]: With dead ends: 67 [2021-12-18 19:35:44,573 INFO L226 Difference]: Without dead ends: 67 [2021-12-18 19:35:44,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:35:44,574 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 126 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:44,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 60 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-18 19:35:44,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2021-12-18 19:35:44,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 58 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) [2021-12-18 19:35:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-12-18 19:35:44,576 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 15 [2021-12-18 19:35:44,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:44,576 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-12-18 19:35:44,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,576 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-12-18 19:35:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 19:35:44,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:44,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:44,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-18 19:35:44,577 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:44,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1432312828, now seen corresponding path program 1 times [2021-12-18 19:35:44,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:44,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589190014] [2021-12-18 19:35:44,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:44,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:44,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:44,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589190014] [2021-12-18 19:35:44,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589190014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:44,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:44,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:44,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138449653] [2021-12-18 19:35:44,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:44,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:44,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:44,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:44,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:44,607 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:44,631 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-12-18 19:35:44,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:44,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-18 19:35:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:44,633 INFO L225 Difference]: With dead ends: 57 [2021-12-18 19:35:44,633 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 19:35:44,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:44,634 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:44,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 47 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 19:35:44,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-18 19:35:44,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 56 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) [2021-12-18 19:35:44,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-12-18 19:35:44,636 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 16 [2021-12-18 19:35:44,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:44,636 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-12-18 19:35:44,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,636 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-12-18 19:35:44,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 19:35:44,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:44,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:44,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-18 19:35:44,637 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:44,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:44,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1432312827, now seen corresponding path program 1 times [2021-12-18 19:35:44,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:44,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792561580] [2021-12-18 19:35:44,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:44,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:44,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:44,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792561580] [2021-12-18 19:35:44,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792561580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:44,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:44,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:35:44,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954915956] [2021-12-18 19:35:44,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:44,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 19:35:44,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:44,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 19:35:44,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-18 19:35:44,710 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:44,777 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-12-18 19:35:44,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:44,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-18 19:35:44,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:44,778 INFO L225 Difference]: With dead ends: 61 [2021-12-18 19:35:44,778 INFO L226 Difference]: Without dead ends: 58 [2021-12-18 19:35:44,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:35:44,778 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 109 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:44,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 55 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:44,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-18 19:35:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-12-18 19:35:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 55 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) [2021-12-18 19:35:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-12-18 19:35:44,780 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 16 [2021-12-18 19:35:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:44,780 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-12-18 19:35:44,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-12-18 19:35:44,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 19:35:44,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:44,780 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:44,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-18 19:35:44,780 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:44,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1455987438, now seen corresponding path program 1 times [2021-12-18 19:35:44,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:44,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473569192] [2021-12-18 19:35:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:44,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:44,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:44,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473569192] [2021-12-18 19:35:44,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473569192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:44,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:44,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:44,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265756897] [2021-12-18 19:35:44,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:44,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:35:44,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:44,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:35:44,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:44,805 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:44,809 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-12-18 19:35:44,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:35:44,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-18 19:35:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:44,810 INFO L225 Difference]: With dead ends: 58 [2021-12-18 19:35:44,810 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 19:35:44,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:44,811 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:44,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 19:35:44,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-18 19:35:44,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 56 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) [2021-12-18 19:35:44,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-12-18 19:35:44,813 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 20 [2021-12-18 19:35:44,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:44,814 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-12-18 19:35:44,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,814 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-12-18 19:35:44,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 19:35:44,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:44,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:44,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-18 19:35:44,815 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:44,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:44,815 INFO L85 PathProgramCache]: Analyzing trace with hash 420786095, now seen corresponding path program 1 times [2021-12-18 19:35:44,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:44,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362037724] [2021-12-18 19:35:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:44,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:44,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:44,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362037724] [2021-12-18 19:35:44,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362037724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:44,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:44,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:44,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557153525] [2021-12-18 19:35:44,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:44,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:35:44,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:44,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:35:44,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:44,839 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:44,843 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-12-18 19:35:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:35:44,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-18 19:35:44,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:44,845 INFO L225 Difference]: With dead ends: 58 [2021-12-18 19:35:44,845 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 19:35:44,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:44,846 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:44,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:44,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 19:35:44,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-18 19:35:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-12-18 19:35:44,848 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 23 [2021-12-18 19:35:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:44,848 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-12-18 19:35:44,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-12-18 19:35:44,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 19:35:44,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:44,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:44,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-18 19:35:44,849 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:44,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:44,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2103285548, now seen corresponding path program 1 times [2021-12-18 19:35:44,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:44,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244035069] [2021-12-18 19:35:44,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:44,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:44,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:44,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244035069] [2021-12-18 19:35:44,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244035069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:44,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:44,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 19:35:44,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907605208] [2021-12-18 19:35:44,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:44,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:35:44,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:44,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:35:44,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:35:44,988 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 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) [2021-12-18 19:35:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:45,090 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-12-18 19:35:45,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:35:45,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 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 [2021-12-18 19:35:45,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:45,091 INFO L225 Difference]: With dead ends: 78 [2021-12-18 19:35:45,091 INFO L226 Difference]: Without dead ends: 52 [2021-12-18 19:35:45,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:35:45,092 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 51 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:45,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 180 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-18 19:35:45,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-18 19:35:45,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-12-18 19:35:45,094 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 25 [2021-12-18 19:35:45,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:45,094 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-12-18 19:35:45,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 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) [2021-12-18 19:35:45,094 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-12-18 19:35:45,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 19:35:45,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:45,097 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:45,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-18 19:35:45,097 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:45,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:45,097 INFO L85 PathProgramCache]: Analyzing trace with hash 386243414, now seen corresponding path program 1 times [2021-12-18 19:35:45,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:45,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356250577] [2021-12-18 19:35:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:45,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:45,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:45,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356250577] [2021-12-18 19:35:45,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356250577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:45,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:45,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 19:35:45,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794311596] [2021-12-18 19:35:45,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:45,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:35:45,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:45,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:35:45,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:35:45,244 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2021-12-18 19:35:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:45,352 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-12-18 19:35:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:35:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 [2021-12-18 19:35:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:45,353 INFO L225 Difference]: With dead ends: 81 [2021-12-18 19:35:45,353 INFO L226 Difference]: Without dead ends: 60 [2021-12-18 19:35:45,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:35:45,353 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 78 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:45,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 184 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-18 19:35:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-12-18 19:35:45,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2040816326530612) 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) [2021-12-18 19:35:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-12-18 19:35:45,355 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 25 [2021-12-18 19:35:45,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:45,355 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-12-18 19:35:45,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2021-12-18 19:35:45,355 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-12-18 19:35:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 19:35:45,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:45,355 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-12-18 19:35:45,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-18 19:35:45,355 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:45,356 INFO L85 PathProgramCache]: Analyzing trace with hash 235047385, now seen corresponding path program 1 times [2021-12-18 19:35:45,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:45,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751699866] [2021-12-18 19:35:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:45,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:45,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:45,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751699866] [2021-12-18 19:35:45,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751699866] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:45,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848576516] [2021-12-18 19:35:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:45,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:45,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:45,440 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) [2021-12-18 19:35:45,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 19:35:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:45,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 19:35:45,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:45,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:35:45,530 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 [2021-12-18 19:35:45,534 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 [2021-12-18 19:35:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:45,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:45,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848576516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:45,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:45,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2021-12-18 19:35:45,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307002527] [2021-12-18 19:35:45,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:45,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 19:35:45,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:45,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 19:35:45,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-18 19:35:45,833 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 17 states, 16 states have (on average 4.5625) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:46,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:46,017 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2021-12-18 19:35:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:35:46,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-18 19:35:46,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:46,018 INFO L225 Difference]: With dead ends: 78 [2021-12-18 19:35:46,018 INFO L226 Difference]: Without dead ends: 78 [2021-12-18 19:35:46,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-12-18 19:35:46,019 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 278 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:46,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 129 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:46,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-18 19:35:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-12-18 19:35:46,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 59 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) [2021-12-18 19:35:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-12-18 19:35:46,020 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 29 [2021-12-18 19:35:46,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:46,021 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-12-18 19:35:46,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 17 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:46,021 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-12-18 19:35:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 19:35:46,021 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:46,021 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 19:35:46,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:46,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:46,223 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:46,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:46,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1303465643, now seen corresponding path program 1 times [2021-12-18 19:35:46,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:46,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458571777] [2021-12-18 19:35:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:46,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:46,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:46,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458571777] [2021-12-18 19:35:46,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458571777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:46,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:46,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-18 19:35:46,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384401780] [2021-12-18 19:35:46,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:46,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-18 19:35:46,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-18 19:35:46,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:35:46,422 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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) [2021-12-18 19:35:46,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:46,616 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2021-12-18 19:35:46,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 19:35:46,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 30 [2021-12-18 19:35:46,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:46,617 INFO L225 Difference]: With dead ends: 74 [2021-12-18 19:35:46,617 INFO L226 Difference]: Without dead ends: 52 [2021-12-18 19:35:46,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:35:46,618 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:46,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 251 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:46,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-18 19:35:46,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-18 19:35:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 51 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) [2021-12-18 19:35:46,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-12-18 19:35:46,619 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 30 [2021-12-18 19:35:46,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:46,619 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-12-18 19:35:46,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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) [2021-12-18 19:35:46,619 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-12-18 19:35:46,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 19:35:46,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:46,619 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 19:35:46,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-18 19:35:46,620 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:46,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:46,620 INFO L85 PathProgramCache]: Analyzing trace with hash 619762391, now seen corresponding path program 1 times [2021-12-18 19:35:46,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:46,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894282682] [2021-12-18 19:35:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:46,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:46,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:46,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894282682] [2021-12-18 19:35:46,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894282682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:46,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:46,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-18 19:35:46,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041277719] [2021-12-18 19:35:46,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:46,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 19:35:46,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 19:35:46,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:35:46,790 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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) [2021-12-18 19:35:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:47,120 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2021-12-18 19:35:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 19:35:47,122 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 30 [2021-12-18 19:35:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:47,123 INFO L225 Difference]: With dead ends: 70 [2021-12-18 19:35:47,123 INFO L226 Difference]: Without dead ends: 56 [2021-12-18 19:35:47,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-12-18 19:35:47,124 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:47,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 238 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:47,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-18 19:35:47,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2021-12-18 19:35:47,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.163265306122449) internal successors, (57), 52 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:47,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2021-12-18 19:35:47,126 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 30 [2021-12-18 19:35:47,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:47,127 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2021-12-18 19:35:47,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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) [2021-12-18 19:35:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2021-12-18 19:35:47,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-18 19:35:47,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:47,127 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-18 19:35:47,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-18 19:35:47,128 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:47,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:47,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1945235956, now seen corresponding path program 1 times [2021-12-18 19:35:47,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:47,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494484883] [2021-12-18 19:35:47,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:47,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:47,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:47,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494484883] [2021-12-18 19:35:47,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494484883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:47,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060220879] [2021-12-18 19:35:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:47,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:47,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:47,245 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) [2021-12-18 19:35:47,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 19:35:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:47,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-18 19:35:47,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:47,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:47,551 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 [2021-12-18 19:35:47,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:47,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060220879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:47,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:47,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2021-12-18 19:35:47,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141676024] [2021-12-18 19:35:47,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:47,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 19:35:47,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:47,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 19:35:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-12-18 19:35:47,585 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 18 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:47,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:47,702 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-12-18 19:35:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:35:47,702 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 18 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-18 19:35:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:47,703 INFO L225 Difference]: With dead ends: 68 [2021-12-18 19:35:47,703 INFO L226 Difference]: Without dead ends: 61 [2021-12-18 19:35:47,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:35:47,704 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 234 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:47,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 131 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:47,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-18 19:35:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2021-12-18 19:35:47,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.125) internal successors, (54), 51 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) [2021-12-18 19:35:47,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-12-18 19:35:47,705 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 34 [2021-12-18 19:35:47,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:47,706 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-12-18 19:35:47,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 18 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:47,706 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-12-18 19:35:47,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-18 19:35:47,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:47,706 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-12-18 19:35:47,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:47,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:47,907 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:47,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:47,908 INFO L85 PathProgramCache]: Analyzing trace with hash -871868475, now seen corresponding path program 1 times [2021-12-18 19:35:47,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:47,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364994427] [2021-12-18 19:35:47,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:47,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:48,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:48,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364994427] [2021-12-18 19:35:48,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364994427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:48,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109980702] [2021-12-18 19:35:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:48,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:48,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:48,172 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) [2021-12-18 19:35:48,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 19:35:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:48,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-18 19:35:48,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:48,361 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 [2021-12-18 19:35:49,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:49,180 INFO L354 Elim1Store]: treesize reduction 28, result has 9.7 percent of original size [2021-12-18 19:35:49,180 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 29 treesize of output 13 [2021-12-18 19:35:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:49,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:51,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:51,083 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 91 treesize of output 91 [2021-12-18 19:35:51,094 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 36 treesize of output 32 [2021-12-18 19:35:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:51,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109980702] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:51,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:51,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 38 [2021-12-18 19:35:51,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679944390] [2021-12-18 19:35:51,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:51,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-18 19:35:51,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:51,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-18 19:35:51,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1284, Unknown=0, NotChecked=0, Total=1406 [2021-12-18 19:35:51,380 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 38 states, 38 states have (on average 2.8157894736842106) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:52,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:52,136 INFO L93 Difference]: Finished difference Result 147 states and 151 transitions. [2021-12-18 19:35:52,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-18 19:35:52,136 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8157894736842106) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 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 [2021-12-18 19:35:52,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:52,137 INFO L225 Difference]: With dead ends: 147 [2021-12-18 19:35:52,137 INFO L226 Difference]: Without dead ends: 66 [2021-12-18 19:35:52,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=349, Invalid=3311, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:35:52,138 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:52,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 591 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 222 Invalid, 0 Unknown, 298 Unchecked, 0.1s Time] [2021-12-18 19:35:52,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-18 19:35:52,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-12-18 19:35:52,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 59 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) [2021-12-18 19:35:52,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-12-18 19:35:52,139 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 43 [2021-12-18 19:35:52,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:52,139 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-12-18 19:35:52,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.8157894736842106) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:52,140 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-12-18 19:35:52,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 19:35:52,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:52,140 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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] [2021-12-18 19:35:52,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:52,351 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,SelfDestructingSolverStorable23 [2021-12-18 19:35:52,351 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:52,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:52,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1808120587, now seen corresponding path program 2 times [2021-12-18 19:35:52,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:52,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140529583] [2021-12-18 19:35:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:52,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:52,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:52,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140529583] [2021-12-18 19:35:52,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140529583] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:52,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458910488] [2021-12-18 19:35:52,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:35:52,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:52,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:52,516 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) [2021-12-18 19:35:52,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 19:35:52,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:35:52,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:52,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 19:35:52,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:52,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:35:52,597 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 [2021-12-18 19:35:52,600 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 [2021-12-18 19:35:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:52,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:53,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458910488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:53,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:53,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2021-12-18 19:35:53,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990179723] [2021-12-18 19:35:53,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:53,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-18 19:35:53,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:53,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-18 19:35:53,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-12-18 19:35:53,407 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 22 states, 21 states have (on average 6.0476190476190474) internal successors, (127), 22 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:53,793 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-12-18 19:35:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:35:53,793 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.0476190476190474) internal successors, (127), 22 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-18 19:35:53,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:53,794 INFO L225 Difference]: With dead ends: 82 [2021-12-18 19:35:53,794 INFO L226 Difference]: Without dead ends: 82 [2021-12-18 19:35:53,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-12-18 19:35:53,794 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 365 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:53,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 292 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:35:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-18 19:35:53,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2021-12-18 19:35:53,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-12-18 19:35:53,796 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 51 [2021-12-18 19:35:53,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:53,796 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-12-18 19:35:53,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.0476190476190474) internal successors, (127), 22 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:53,796 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-12-18 19:35:53,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 19:35:53,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:53,797 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2021-12-18 19:35:53,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:54,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:54,015 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:54,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:54,016 INFO L85 PathProgramCache]: Analyzing trace with hash 217163363, now seen corresponding path program 2 times [2021-12-18 19:35:54,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:54,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907102262] [2021-12-18 19:35:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:54,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:54,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:54,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907102262] [2021-12-18 19:35:54,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907102262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:54,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078433154] [2021-12-18 19:35:54,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:35:54,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:54,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:54,292 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) [2021-12-18 19:35:54,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 19:35:54,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:35:54,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:54,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 19:35:54,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:54,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:54,724 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 [2021-12-18 19:35:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:54,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078433154] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:54,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:54,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-18 19:35:54,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664614183] [2021-12-18 19:35:54,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:54,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 19:35:54,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:54,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 19:35:54,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:35:54,769 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 21 states, 20 states have (on average 5.25) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:55,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:55,005 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2021-12-18 19:35:55,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:35:55,006 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.25) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 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 [2021-12-18 19:35:55,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:55,006 INFO L225 Difference]: With dead ends: 80 [2021-12-18 19:35:55,006 INFO L226 Difference]: Without dead ends: 76 [2021-12-18 19:35:55,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-12-18 19:35:55,007 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 381 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:55,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 210 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:55,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-18 19:35:55,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2021-12-18 19:35:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 69 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) [2021-12-18 19:35:55,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-12-18 19:35:55,008 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 52 [2021-12-18 19:35:55,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:55,008 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-12-18 19:35:55,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.25) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:55,009 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-12-18 19:35:55,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 19:35:55,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:55,009 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2021-12-18 19:35:55,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:55,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:55,209 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:55,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:55,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1900752950, now seen corresponding path program 3 times [2021-12-18 19:35:55,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:55,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692482418] [2021-12-18 19:35:55,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:55,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:55,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:55,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692482418] [2021-12-18 19:35:55,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692482418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:55,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135251638] [2021-12-18 19:35:55,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:35:55,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:55,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:55,482 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) [2021-12-18 19:35:55,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 19:35:55,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:35:55,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:55,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 19:35:55,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:55,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:35:55,858 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 [2021-12-18 19:35:55,915 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 [2021-12-18 19:35:56,346 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 [2021-12-18 19:35:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:56,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:56,512 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_371 (Array Int Int)) (|v_ULTIMATE.start_cstrncmp_~s1#1.offset_32| Int)) (or (< |v_ULTIMATE.start_cstrncmp_~s1#1.offset_32| 0) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_371) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrncmp_~s1#1.offset_32| 2)) 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrncmp_~s1#1.offset_32|))) is different from false [2021-12-18 19:35:56,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:56,524 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 [2021-12-18 19:35:56,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:56,530 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 [2021-12-18 19:35:56,533 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 [2021-12-18 19:35:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:57,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135251638] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:57,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:57,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 32 [2021-12-18 19:35:57,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054181160] [2021-12-18 19:35:57,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:57,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 19:35:57,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:57,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 19:35:57,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=831, Unknown=1, NotChecked=58, Total=992 [2021-12-18 19:35:57,024 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 32 states, 32 states have (on average 4.1875) 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) [2021-12-18 19:35:57,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:57,362 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2021-12-18 19:35:57,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 19:35:57,363 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.1875) 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 61 [2021-12-18 19:35:57,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:57,363 INFO L225 Difference]: With dead ends: 121 [2021-12-18 19:35:57,363 INFO L226 Difference]: Without dead ends: 77 [2021-12-18 19:35:57,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=1348, Unknown=1, NotChecked=76, Total=1640 [2021-12-18 19:35:57,364 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 162 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:57,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 631 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 384 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2021-12-18 19:35:57,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-18 19:35:57,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-12-18 19:35:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 73 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-12-18 19:35:57,366 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 61 [2021-12-18 19:35:57,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:57,366 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-12-18 19:35:57,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.1875) 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) [2021-12-18 19:35:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-12-18 19:35:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-18 19:35:57,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:57,366 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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] [2021-12-18 19:35:57,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-18 19:35:57,569 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,SelfDestructingSolverStorable26 [2021-12-18 19:35:57,570 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:57,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1100150215, now seen corresponding path program 4 times [2021-12-18 19:35:57,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:57,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113536635] [2021-12-18 19:35:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:57,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:57,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:57,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113536635] [2021-12-18 19:35:57,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113536635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:57,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716006833] [2021-12-18 19:35:57,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:35:57,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:57,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:57,691 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) [2021-12-18 19:35:57,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 19:35:57,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:35:57,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:57,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 19:35:57,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:58,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:58,212 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 [2021-12-18 19:35:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:58,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716006833] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:58,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:58,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2021-12-18 19:35:58,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287215330] [2021-12-18 19:35:58,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:58,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 19:35:58,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:58,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 19:35:58,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-12-18 19:35:58,270 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 24 states, 23 states have (on average 5.739130434782608) internal successors, (132), 24 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:58,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:58,507 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-12-18 19:35:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:35:58,507 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.739130434782608) internal successors, (132), 24 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-18 19:35:58,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:58,508 INFO L225 Difference]: With dead ends: 96 [2021-12-18 19:35:58,508 INFO L226 Difference]: Without dead ends: 96 [2021-12-18 19:35:58,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:35:58,509 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 311 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:58,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 344 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:58,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-18 19:35:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2021-12-18 19:35:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 84 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) [2021-12-18 19:35:58,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-12-18 19:35:58,517 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 65 [2021-12-18 19:35:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:58,518 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-12-18 19:35:58,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.739130434782608) internal successors, (132), 24 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:58,519 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-12-18 19:35:58,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 19:35:58,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:58,519 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2021-12-18 19:35:58,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:58,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-18 19:35:58,745 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:35:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:58,746 INFO L85 PathProgramCache]: Analyzing trace with hash 255081717, now seen corresponding path program 3 times [2021-12-18 19:35:58,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:58,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527167522] [2021-12-18 19:35:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:58,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:59,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:59,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527167522] [2021-12-18 19:35:59,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527167522] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:59,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170557350] [2021-12-18 19:35:59,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:35:59,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:59,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:59,334 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) [2021-12-18 19:35:59,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 19:35:59,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:35:59,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:59,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-18 19:35:59,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:59,632 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 [2021-12-18 19:35:59,939 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 [2021-12-18 19:35:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:35:59,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:00,106 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 [2021-12-18 19:36:00,108 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 [2021-12-18 19:36:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:00,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170557350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:00,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:00,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 36 [2021-12-18 19:36:00,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502577312] [2021-12-18 19:36:00,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:00,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 19:36:00,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:00,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 19:36:00,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 19:36:00,444 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:01,148 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2021-12-18 19:36:01,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 19:36:01,149 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-18 19:36:01,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:01,149 INFO L225 Difference]: With dead ends: 129 [2021-12-18 19:36:01,149 INFO L226 Difference]: Without dead ends: 95 [2021-12-18 19:36:01,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=321, Invalid=2331, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 19:36:01,150 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 184 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:01,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 675 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 664 Invalid, 0 Unknown, 156 Unchecked, 0.3s Time] [2021-12-18 19:36:01,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-18 19:36:01,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2021-12-18 19:36:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-12-18 19:36:01,152 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 66 [2021-12-18 19:36:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:01,152 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-12-18 19:36:01,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-12-18 19:36:01,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-18 19:36:01,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:01,153 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:01,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:01,367 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,SelfDestructingSolverStorable28 [2021-12-18 19:36:01,367 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:36:01,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:01,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1806012818, now seen corresponding path program 4 times [2021-12-18 19:36:01,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:01,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132975152] [2021-12-18 19:36:01,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:01,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:01,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:01,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132975152] [2021-12-18 19:36:01,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132975152] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:01,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905619810] [2021-12-18 19:36:01,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:36:01,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:01,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:01,543 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) [2021-12-18 19:36:01,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 19:36:01,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:36:01,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:01,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-18 19:36:01,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:01,672 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:36:01,672 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 [2021-12-18 19:36:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:02,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:02,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905619810] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:02,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:02,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2021-12-18 19:36:02,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125915926] [2021-12-18 19:36:02,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:02,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 19:36:02,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:02,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 19:36:02,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:36:02,505 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 31 states, 30 states have (on average 5.766666666666667) internal successors, (173), 31 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) [2021-12-18 19:36:02,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:02,849 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2021-12-18 19:36:02,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 19:36:02,849 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 5.766666666666667) internal successors, (173), 31 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 70 [2021-12-18 19:36:02,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:02,850 INFO L225 Difference]: With dead ends: 98 [2021-12-18 19:36:02,850 INFO L226 Difference]: Without dead ends: 94 [2021-12-18 19:36:02,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=1052, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 19:36:02,851 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 375 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:02,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 374 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:36:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-18 19:36:02,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2021-12-18 19:36:02,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 87 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:02,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-12-18 19:36:02,853 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 70 [2021-12-18 19:36:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:02,853 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-12-18 19:36:02,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 5.766666666666667) internal successors, (173), 31 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) [2021-12-18 19:36:02,854 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-12-18 19:36:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-18 19:36:02,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:02,854 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:02,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:03,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:03,067 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:36:03,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:03,068 INFO L85 PathProgramCache]: Analyzing trace with hash 810248679, now seen corresponding path program 5 times [2021-12-18 19:36:03,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:03,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683065431] [2021-12-18 19:36:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:03,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:03,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:03,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683065431] [2021-12-18 19:36:03,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683065431] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:03,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145776260] [2021-12-18 19:36:03,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:36:03,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:03,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:03,334 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) [2021-12-18 19:36:03,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 19:36:03,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-18 19:36:03,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:03,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 19:36:03,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:03,584 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 [2021-12-18 19:36:04,229 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 [2021-12-18 19:36:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:04,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:07,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:07,489 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 91 treesize of output 91 [2021-12-18 19:36:07,526 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 36 treesize of output 32 [2021-12-18 19:36:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:07,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145776260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:07,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:07,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 39 [2021-12-18 19:36:07,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732757371] [2021-12-18 19:36:07,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:07,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 19:36:07,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:07,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 19:36:07,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1380, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 19:36:07,748 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:08,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:08,740 INFO L93 Difference]: Finished difference Result 247 states and 252 transitions. [2021-12-18 19:36:08,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-18 19:36:08,741 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 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 79 [2021-12-18 19:36:08,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:08,741 INFO L225 Difference]: With dead ends: 247 [2021-12-18 19:36:08,741 INFO L226 Difference]: Without dead ends: 102 [2021-12-18 19:36:08,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 133 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=302, Invalid=3858, Unknown=0, NotChecked=0, Total=4160 [2021-12-18 19:36:08,743 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 90 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:08,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1009 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 531 Invalid, 0 Unknown, 284 Unchecked, 0.2s Time] [2021-12-18 19:36:08,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-18 19:36:08,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-12-18 19:36:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.065217391304348) internal successors, (98), 95 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) [2021-12-18 19:36:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-12-18 19:36:08,745 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 79 [2021-12-18 19:36:08,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:08,745 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-12-18 19:36:08,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.487179487179487) internal successors, (175), 39 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:08,746 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-12-18 19:36:08,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-18 19:36:08,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:08,749 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:08,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:08,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:08,964 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:36:08,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:08,965 INFO L85 PathProgramCache]: Analyzing trace with hash 136208941, now seen corresponding path program 6 times [2021-12-18 19:36:08,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:08,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322551654] [2021-12-18 19:36:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:08,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 94 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:09,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:09,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322551654] [2021-12-18 19:36:09,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322551654] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:09,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405129759] [2021-12-18 19:36:09,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:36:09,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:09,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:09,161 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) [2021-12-18 19:36:09,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 19:36:09,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-18 19:36:09,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:09,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 19:36:09,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:09,293 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 10 treesize of output 8 [2021-12-18 19:36:09,300 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 [2021-12-18 19:36:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:10,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:10,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405129759] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:10,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:10,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2021-12-18 19:36:10,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484192817] [2021-12-18 19:36:10,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:10,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 19:36:10,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:10,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 19:36:10,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:36:10,709 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 35 states, 34 states have (on average 6.382352941176471) internal successors, (217), 35 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:11,166 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2021-12-18 19:36:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 19:36:11,167 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 6.382352941176471) internal successors, (217), 35 states have internal predecessors, (217), 0 states have call successors, (0), 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 87 [2021-12-18 19:36:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:11,167 INFO L225 Difference]: With dead ends: 118 [2021-12-18 19:36:11,168 INFO L226 Difference]: Without dead ends: 118 [2021-12-18 19:36:11,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=387, Invalid=1683, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 19:36:11,169 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 677 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:11,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 336 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:36:11,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-18 19:36:11,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 107. [2021-12-18 19:36:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 106 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2021-12-18 19:36:11,177 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 87 [2021-12-18 19:36:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:11,177 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2021-12-18 19:36:11,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 6.382352941176471) internal successors, (217), 35 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:11,177 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2021-12-18 19:36:11,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-18 19:36:11,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:11,178 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:11,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:11,391 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,SelfDestructingSolverStorable31 [2021-12-18 19:36:11,391 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:36:11,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:11,392 INFO L85 PathProgramCache]: Analyzing trace with hash -72490111, now seen corresponding path program 5 times [2021-12-18 19:36:11,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:11,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645768010] [2021-12-18 19:36:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:11,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 6 proven. 98 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:11,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:11,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645768010] [2021-12-18 19:36:11,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645768010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:11,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439967098] [2021-12-18 19:36:11,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:36:11,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:11,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:11,612 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) [2021-12-18 19:36:11,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 19:36:11,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-18 19:36:11,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:11,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-18 19:36:11,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:11,755 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:36:11,755 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 [2021-12-18 19:36:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 15 proven. 89 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:12,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 76 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:12,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439967098] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:12,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:12,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2021-12-18 19:36:12,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322782867] [2021-12-18 19:36:12,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:12,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 19:36:12,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:12,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 19:36:12,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 19:36:12,818 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 34 states, 33 states have (on average 6.333333333333333) internal successors, (209), 34 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:13,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:13,040 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2021-12-18 19:36:13,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:36:13,041 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 6.333333333333333) internal successors, (209), 34 states have internal predecessors, (209), 0 states have call successors, (0), 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 88 [2021-12-18 19:36:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:13,041 INFO L225 Difference]: With dead ends: 116 [2021-12-18 19:36:13,041 INFO L226 Difference]: Without dead ends: 112 [2021-12-18 19:36:13,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=1289, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 19:36:13,042 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 409 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:13,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 404 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:36:13,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-18 19:36:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2021-12-18 19:36:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 105 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-12-18 19:36:13,044 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 88 [2021-12-18 19:36:13,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:13,044 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-12-18 19:36:13,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 6.333333333333333) internal successors, (209), 34 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:13,044 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-12-18 19:36:13,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-18 19:36:13,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:13,044 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:13,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:13,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:13,255 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:36:13,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:13,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1990120664, now seen corresponding path program 7 times [2021-12-18 19:36:13,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:13,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221183824] [2021-12-18 19:36:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:13,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:13,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:13,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221183824] [2021-12-18 19:36:13,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221183824] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:13,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321053122] [2021-12-18 19:36:13,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:36:13,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:13,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:13,585 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) [2021-12-18 19:36:13,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 19:36:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:13,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-18 19:36:13,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:14,071 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 [2021-12-18 19:36:16,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:16,307 INFO L354 Elim1Store]: treesize reduction 28, result has 9.7 percent of original size [2021-12-18 19:36:16,307 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 29 treesize of output 13 [2021-12-18 19:36:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:16,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:18,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:18,356 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 91 treesize of output 91 [2021-12-18 19:36:18,372 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 36 treesize of output 32 [2021-12-18 19:36:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:19,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321053122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:19,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:19,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 23] total 53 [2021-12-18 19:36:19,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50272259] [2021-12-18 19:36:19,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:19,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-18 19:36:19,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:19,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-18 19:36:19,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2601, Unknown=0, NotChecked=0, Total=2756 [2021-12-18 19:36:19,093 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 53 states, 53 states have (on average 4.320754716981132) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:20,794 INFO L93 Difference]: Finished difference Result 301 states and 306 transitions. [2021-12-18 19:36:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-18 19:36:20,795 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.320754716981132) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 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 97 [2021-12-18 19:36:20,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:20,795 INFO L225 Difference]: With dead ends: 301 [2021-12-18 19:36:20,795 INFO L226 Difference]: Without dead ends: 120 [2021-12-18 19:36:20,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=497, Invalid=7693, Unknown=0, NotChecked=0, Total=8190 [2021-12-18 19:36:20,798 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 170 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 583 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:20,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1530 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 694 Invalid, 0 Unknown, 583 Unchecked, 0.3s Time] [2021-12-18 19:36:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-18 19:36:20,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2021-12-18 19:36:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.0545454545454545) internal successors, (116), 113 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2021-12-18 19:36:20,815 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 97 [2021-12-18 19:36:20,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:20,815 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2021-12-18 19:36:20,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.320754716981132) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2021-12-18 19:36:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-18 19:36:20,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:20,818 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:20,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:21,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:21,028 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:36:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:21,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2118244450, now seen corresponding path program 8 times [2021-12-18 19:36:21,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:21,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374684642] [2021-12-18 19:36:21,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:21,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 15 proven. 145 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:36:21,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:21,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374684642] [2021-12-18 19:36:21,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374684642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:21,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639458819] [2021-12-18 19:36:21,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:36:21,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:21,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:21,198 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) [2021-12-18 19:36:21,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 19:36:21,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:36:21,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:21,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-18 19:36:21,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 28 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:36:21,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:22,062 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 [2021-12-18 19:36:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 28 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:36:22,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639458819] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:22,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:22,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2021-12-18 19:36:22,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983486841] [2021-12-18 19:36:22,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:22,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-18 19:36:22,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:22,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-18 19:36:22,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2021-12-18 19:36:22,152 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 32 states, 31 states have (on average 6.064516129032258) internal successors, (188), 32 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:22,603 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2021-12-18 19:36:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 19:36:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 6.064516129032258) internal successors, (188), 32 states have internal predecessors, (188), 0 states have call successors, (0), 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 105 [2021-12-18 19:36:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:22,604 INFO L225 Difference]: With dead ends: 136 [2021-12-18 19:36:22,605 INFO L226 Difference]: Without dead ends: 136 [2021-12-18 19:36:22,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 19:36:22,605 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 673 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:22,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 518 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:36:22,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-18 19:36:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 125. [2021-12-18 19:36:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.0578512396694215) internal successors, (128), 124 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2021-12-18 19:36:22,607 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 105 [2021-12-18 19:36:22,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:22,607 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2021-12-18 19:36:22,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 6.064516129032258) internal successors, (188), 32 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:22,607 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2021-12-18 19:36:22,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-18 19:36:22,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:22,608 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:22,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:22,808 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,SelfDestructingSolverStorable34 [2021-12-18 19:36:22,808 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:36:22,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:22,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1241068496, now seen corresponding path program 6 times [2021-12-18 19:36:22,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:22,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670366446] [2021-12-18 19:36:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:22,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 15 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:36:23,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:23,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670366446] [2021-12-18 19:36:23,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670366446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:23,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013706927] [2021-12-18 19:36:23,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:36:23,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:23,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:23,036 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) [2021-12-18 19:36:23,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 19:36:23,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-18 19:36:23,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:23,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-18 19:36:23,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:23,242 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:36:23,243 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 [2021-12-18 19:36:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 28 proven. 137 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:36:23,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 45 proven. 120 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:36:24,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013706927] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:24,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:24,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2021-12-18 19:36:24,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119562814] [2021-12-18 19:36:24,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:24,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 19:36:24,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:24,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 19:36:24,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2021-12-18 19:36:24,533 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 44 states, 43 states have (on average 6.093023255813954) internal successors, (262), 44 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:24,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:24,874 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2021-12-18 19:36:24,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 19:36:24,874 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 6.093023255813954) internal successors, (262), 44 states have internal predecessors, (262), 0 states have call successors, (0), 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 106 [2021-12-18 19:36:24,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:24,875 INFO L225 Difference]: With dead ends: 134 [2021-12-18 19:36:24,875 INFO L226 Difference]: Without dead ends: 130 [2021-12-18 19:36:24,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=544, Invalid=2108, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 19:36:24,876 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 914 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:24,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 398 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:36:24,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-18 19:36:24,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2021-12-18 19:36:24,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.05) internal successors, (126), 123 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2021-12-18 19:36:24,877 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 106 [2021-12-18 19:36:24,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:24,878 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2021-12-18 19:36:24,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 6.093023255813954) internal successors, (262), 44 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2021-12-18 19:36:24,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-18 19:36:24,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:24,878 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:24,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:25,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:25,087 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:36:25,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:25,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1811890441, now seen corresponding path program 9 times [2021-12-18 19:36:25,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:25,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330948185] [2021-12-18 19:36:25,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:25,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 18 proven. 195 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:36:25,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:25,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330948185] [2021-12-18 19:36:25,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330948185] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:25,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909670826] [2021-12-18 19:36:25,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:36:25,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:25,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:25,342 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) [2021-12-18 19:36:25,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 19:36:25,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-18 19:36:25,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:25,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-18 19:36:25,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:25,600 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:36:25,600 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 [2021-12-18 19:36:25,998 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 [2021-12-18 19:36:26,060 INFO L354 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2021-12-18 19:36:26,061 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 26 treesize of output 25 [2021-12-18 19:36:26,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:26,978 INFO L354 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2021-12-18 19:36:26,978 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 10 [2021-12-18 19:36:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 18 proven. 195 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:36:27,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:27,985 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 56 treesize of output 50 [2021-12-18 19:36:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:36:29,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909670826] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:29,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:29,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 58 [2021-12-18 19:36:29,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460154421] [2021-12-18 19:36:29,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:29,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-18 19:36:29,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:29,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-18 19:36:29,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3124, Unknown=0, NotChecked=0, Total=3306 [2021-12-18 19:36:29,245 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 58 states, 58 states have (on average 4.931034482758621) internal successors, (286), 58 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:30,259 INFO L93 Difference]: Finished difference Result 217 states and 220 transitions. [2021-12-18 19:36:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:36:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.931034482758621) internal successors, (286), 58 states have internal predecessors, (286), 0 states have call successors, (0), 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 115 [2021-12-18 19:36:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:30,261 INFO L225 Difference]: With dead ends: 217 [2021-12-18 19:36:30,261 INFO L226 Difference]: Without dead ends: 131 [2021-12-18 19:36:30,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=309, Invalid=5093, Unknown=0, NotChecked=0, Total=5402 [2021-12-18 19:36:30,262 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 65 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:30,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1380 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 617 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2021-12-18 19:36:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-18 19:36:30,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2021-12-18 19:36:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 124 states have (on average 1.0483870967741935) internal successors, (130), 127 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2021-12-18 19:36:30,265 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 115 [2021-12-18 19:36:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:30,265 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2021-12-18 19:36:30,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.931034482758621) internal successors, (286), 58 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2021-12-18 19:36:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-18 19:36:30,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:30,266 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:30,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:30,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:30,475 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:36:30,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:30,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1123457740, now seen corresponding path program 10 times [2021-12-18 19:36:30,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:30,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703419243] [2021-12-18 19:36:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:30,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 28 proven. 206 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:36:30,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:30,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703419243] [2021-12-18 19:36:30,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703419243] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:30,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633469060] [2021-12-18 19:36:30,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:36:30,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:30,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:30,692 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) [2021-12-18 19:36:30,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 19:36:30,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:36:30,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:30,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 19:36:30,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:30,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,926 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 [2021-12-18 19:36:30,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:36:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 45 proven. 189 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:36:31,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 66 proven. 168 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:36:32,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633469060] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:32,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:32,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2021-12-18 19:36:32,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806671968] [2021-12-18 19:36:32,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:32,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 19:36:32,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 19:36:32,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1840, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 19:36:32,556 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 46 states, 45 states have (on average 6.555555555555555) internal successors, (295), 46 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:33,255 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2021-12-18 19:36:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:36:33,255 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 6.555555555555555) internal successors, (295), 46 states have internal predecessors, (295), 0 states have call successors, (0), 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 119 [2021-12-18 19:36:33,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:33,256 INFO L225 Difference]: With dead ends: 150 [2021-12-18 19:36:33,256 INFO L226 Difference]: Without dead ends: 150 [2021-12-18 19:36:33,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=621, Invalid=3039, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:36:33,257 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 859 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:33,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 904 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:36:33,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-18 19:36:33,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 139. [2021-12-18 19:36:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 135 states have (on average 1.0518518518518518) internal successors, (142), 138 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2021-12-18 19:36:33,261 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 119 [2021-12-18 19:36:33,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:33,261 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2021-12-18 19:36:33,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 6.555555555555555) internal successors, (295), 46 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:33,261 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2021-12-18 19:36:33,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-18 19:36:33,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:33,262 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:33,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-18 19:36:33,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:33,483 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:36:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:33,485 INFO L85 PathProgramCache]: Analyzing trace with hash 467451586, now seen corresponding path program 7 times [2021-12-18 19:36:33,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:33,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172628649] [2021-12-18 19:36:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:33,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 24 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:33,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:33,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172628649] [2021-12-18 19:36:33,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172628649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:33,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107373766] [2021-12-18 19:36:33,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:36:33,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:33,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:33,966 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) [2021-12-18 19:36:33,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 19:36:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-18 19:36:34,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:34,203 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 [2021-12-18 19:36:35,958 INFO L354 Elim1Store]: treesize reduction 10, result has 74.4 percent of original size [2021-12-18 19:36:35,958 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 29 treesize of output 38 [2021-12-18 19:36:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 28 proven. 191 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:36:36,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:37,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:37,206 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 91 treesize of output 91 [2021-12-18 19:36:37,210 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 [2021-12-18 19:36:37,221 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 36 treesize of output 32 [2021-12-18 19:36:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 28 proven. 191 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:36:37,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107373766] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:37,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:37,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 22, 22] total 66 [2021-12-18 19:36:37,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75211990] [2021-12-18 19:36:37,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:37,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-18 19:36:37,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:37,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-18 19:36:37,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=4015, Unknown=0, NotChecked=0, Total=4290 [2021-12-18 19:36:37,292 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 66 states, 66 states have (on average 4.287878787878788) internal successors, (283), 66 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:40,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:40,891 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2021-12-18 19:36:40,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-18 19:36:40,891 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.287878787878788) internal successors, (283), 66 states have internal predecessors, (283), 0 states have call successors, (0), 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 120 [2021-12-18 19:36:40,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:40,892 INFO L225 Difference]: With dead ends: 219 [2021-12-18 19:36:40,892 INFO L226 Difference]: Without dead ends: 151 [2021-12-18 19:36:40,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 227 SyntacticMatches, 7 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2100 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=651, Invalid=8469, Unknown=0, NotChecked=0, Total=9120 [2021-12-18 19:36:40,894 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 506 mSDsluCounter, 2139 mSDsCounter, 0 mSdLazyCounter, 1314 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 2203 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 754 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:40,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 2203 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1314 Invalid, 0 Unknown, 754 Unchecked, 0.4s Time] [2021-12-18 19:36:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-18 19:36:40,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 142. [2021-12-18 19:36:40,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 138 states have (on average 1.0434782608695652) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:40,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2021-12-18 19:36:40,899 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 120 [2021-12-18 19:36:40,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:40,899 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2021-12-18 19:36:40,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.287878787878788) internal successors, (283), 66 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:40,900 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2021-12-18 19:36:40,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-18 19:36:40,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:40,901 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:40,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:41,120 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,SelfDestructingSolverStorable38 [2021-12-18 19:36:41,121 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:36:41,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:41,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1689616774, now seen corresponding path program 11 times [2021-12-18 19:36:41,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:41,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646566888] [2021-12-18 19:36:41,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:41,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 21 proven. 276 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:36:41,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:41,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646566888] [2021-12-18 19:36:41,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646566888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:41,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600721492] [2021-12-18 19:36:41,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:36:41,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:41,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:41,492 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) [2021-12-18 19:36:41,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 19:36:41,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-18 19:36:41,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:41,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-18 19:36:41,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:42,001 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 [2021-12-18 19:36:42,810 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 [2021-12-18 19:36:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 21 proven. 276 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:36:42,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:43,806 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:43,806 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 91 treesize of output 91 [2021-12-18 19:36:43,857 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 36 treesize of output 32 [2021-12-18 19:36:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 21 proven. 276 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:36:44,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600721492] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:44,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:44,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 25] total 54 [2021-12-18 19:36:44,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372924931] [2021-12-18 19:36:44,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:44,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-18 19:36:44,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:44,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-18 19:36:44,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2724, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 19:36:44,073 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 54 states, 54 states have (on average 5.351851851851852) internal successors, (289), 54 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:46,134 INFO L93 Difference]: Finished difference Result 403 states and 408 transitions. [2021-12-18 19:36:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-18 19:36:46,135 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.351851851851852) internal successors, (289), 54 states have internal predecessors, (289), 0 states have call successors, (0), 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 133 [2021-12-18 19:36:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:46,135 INFO L225 Difference]: With dead ends: 403 [2021-12-18 19:36:46,135 INFO L226 Difference]: Without dead ends: 156 [2021-12-18 19:36:46,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 232 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=413, Invalid=7959, Unknown=0, NotChecked=0, Total=8372 [2021-12-18 19:36:46,136 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 119 mSDsluCounter, 2291 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 2203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:46,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 2356 Invalid, 2203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1441 Invalid, 0 Unknown, 727 Unchecked, 0.6s Time] [2021-12-18 19:36:46,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-18 19:36:46,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 150. [2021-12-18 19:36:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.0410958904109588) internal successors, (152), 149 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2021-12-18 19:36:46,138 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 133 [2021-12-18 19:36:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:46,138 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2021-12-18 19:36:46,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.351851851851852) internal successors, (289), 54 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:46,139 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2021-12-18 19:36:46,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-18 19:36:46,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:46,139 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:46,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:46,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-18 19:36:46,351 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:36:46,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:46,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1890736576, now seen corresponding path program 12 times [2021-12-18 19:36:46,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:46,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107818397] [2021-12-18 19:36:46,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:46,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 45 proven. 277 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:36:46,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:46,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107818397] [2021-12-18 19:36:46,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107818397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:46,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312653951] [2021-12-18 19:36:46,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:36:46,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:46,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:46,630 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) [2021-12-18 19:36:46,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 19:36:47,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-18 19:36:47,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:47,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-18 19:36:47,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 66 proven. 346 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:36:47,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:48,212 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 [2021-12-18 19:36:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 66 proven. 256 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:36:48,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312653951] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:48,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:48,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25, 19] total 52 [2021-12-18 19:36:48,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477068170] [2021-12-18 19:36:48,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:48,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-18 19:36:48,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:48,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-18 19:36:48,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2440, Unknown=0, NotChecked=0, Total=2756 [2021-12-18 19:36:48,489 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 53 states, 52 states have (on average 6.4423076923076925) internal successors, (335), 53 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:49,379 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2021-12-18 19:36:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:36:49,380 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 6.4423076923076925) internal successors, (335), 53 states have internal predecessors, (335), 0 states have call successors, (0), 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 141 [2021-12-18 19:36:49,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:49,380 INFO L225 Difference]: With dead ends: 172 [2021-12-18 19:36:49,380 INFO L226 Difference]: Without dead ends: 172 [2021-12-18 19:36:49,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=775, Invalid=4055, Unknown=0, NotChecked=0, Total=4830 [2021-12-18 19:36:49,381 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 929 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:49,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [929 Valid, 1040 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:36:49,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-12-18 19:36:49,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 161. [2021-12-18 19:36:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.0445859872611465) internal successors, (164), 160 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2021-12-18 19:36:49,383 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 141 [2021-12-18 19:36:49,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:49,383 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2021-12-18 19:36:49,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 6.4423076923076925) internal successors, (335), 53 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2021-12-18 19:36:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-18 19:36:49,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:49,384 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:49,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:49,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:49,584 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:36:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:49,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1516708302, now seen corresponding path program 8 times [2021-12-18 19:36:49,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:49,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132260718] [2021-12-18 19:36:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:49,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 45 proven. 284 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:36:49,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:49,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132260718] [2021-12-18 19:36:49,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132260718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:49,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484788056] [2021-12-18 19:36:49,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:36:49,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:49,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:49,916 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) [2021-12-18 19:36:49,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 19:36:50,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:36:50,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:50,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-18 19:36:50,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:50,109 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:36:50,110 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 [2021-12-18 19:36:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 66 proven. 263 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:36:50,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 91 proven. 238 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:36:51,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484788056] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:51,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:51,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2021-12-18 19:36:51,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131910147] [2021-12-18 19:36:51,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:51,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-18 19:36:51,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:51,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-18 19:36:51,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=2113, Unknown=0, NotChecked=0, Total=2450 [2021-12-18 19:36:51,973 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand has 50 states, 49 states have (on average 6.591836734693878) internal successors, (323), 50 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:52,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:52,388 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2021-12-18 19:36:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 19:36:52,388 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 6.591836734693878) internal successors, (323), 50 states have internal predecessors, (323), 0 states have call successors, (0), 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 142 [2021-12-18 19:36:52,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:52,389 INFO L225 Difference]: With dead ends: 170 [2021-12-18 19:36:52,389 INFO L226 Difference]: Without dead ends: 166 [2021-12-18 19:36:52,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 250 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=666, Invalid=2874, Unknown=0, NotChecked=0, Total=3540 [2021-12-18 19:36:52,390 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 385 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:52,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 823 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:36:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-18 19:36:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-12-18 19:36:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 156 states have (on average 1.0384615384615385) internal successors, (162), 159 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2021-12-18 19:36:52,393 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 142 [2021-12-18 19:36:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:52,393 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2021-12-18 19:36:52,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 6.591836734693878) internal successors, (323), 50 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2021-12-18 19:36:52,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-18 19:36:52,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:52,394 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:52,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:52,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:52,617 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:36:52,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:52,617 INFO L85 PathProgramCache]: Analyzing trace with hash -612213461, now seen corresponding path program 13 times [2021-12-18 19:36:52,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:52,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800213607] [2021-12-18 19:36:52,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:52,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 371 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:36:52,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:52,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800213607] [2021-12-18 19:36:52,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800213607] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:52,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652347587] [2021-12-18 19:36:52,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:36:52,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:52,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:52,934 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) [2021-12-18 19:36:52,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 19:36:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:53,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-18 19:36:53,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:53,431 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 [2021-12-18 19:36:54,693 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 [2021-12-18 19:36:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 371 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:36:54,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:55,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:55,697 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 91 treesize of output 91 [2021-12-18 19:36:55,729 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 36 treesize of output 32 [2021-12-18 19:36:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 371 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:36:55,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652347587] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:55,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:55,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 27] total 59 [2021-12-18 19:36:55,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320201040] [2021-12-18 19:36:55,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:55,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-18 19:36:55,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:55,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-18 19:36:55,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3272, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 19:36:55,954 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 59 states, 59 states have (on average 5.5423728813559325) internal successors, (327), 59 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:58,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:58,092 INFO L93 Difference]: Finished difference Result 455 states and 460 transitions. [2021-12-18 19:36:58,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-18 19:36:58,092 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 5.5423728813559325) internal successors, (327), 59 states have internal predecessors, (327), 0 states have call successors, (0), 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 151 [2021-12-18 19:36:58,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:58,093 INFO L225 Difference]: With dead ends: 455 [2021-12-18 19:36:58,093 INFO L226 Difference]: Without dead ends: 174 [2021-12-18 19:36:58,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 265 SyntacticMatches, 12 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 1969 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=459, Invalid=9843, Unknown=0, NotChecked=0, Total=10302 [2021-12-18 19:36:58,094 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 134 mSDsluCounter, 2710 mSDsCounter, 0 mSdLazyCounter, 1649 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2783 SdHoareTripleChecker+Invalid, 2617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 929 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:58,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2783 Invalid, 2617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1649 Invalid, 0 Unknown, 929 Unchecked, 0.5s Time] [2021-12-18 19:36:58,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-18 19:36:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2021-12-18 19:36:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 164 states have (on average 1.0365853658536586) internal successors, (170), 167 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2021-12-18 19:36:58,096 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 151 [2021-12-18 19:36:58,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:58,096 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2021-12-18 19:36:58,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 5.5423728813559325) internal successors, (327), 59 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:58,097 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2021-12-18 19:36:58,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-18 19:36:58,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:58,097 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:58,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:58,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:58,311 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:36:58,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:58,312 INFO L85 PathProgramCache]: Analyzing trace with hash 91029361, now seen corresponding path program 14 times [2021-12-18 19:36:58,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:58,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176913366] [2021-12-18 19:36:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:58,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 66 proven. 358 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:36:58,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:58,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176913366] [2021-12-18 19:36:58,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176913366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:58,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309702246] [2021-12-18 19:36:58,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:36:58,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:58,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:58,653 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) [2021-12-18 19:36:58,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 19:36:58,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:36:58,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:58,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-18 19:36:58,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 91 proven. 333 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:36:59,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:59,920 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 [2021-12-18 19:37:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 91 proven. 333 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:37:00,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309702246] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:00,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:00,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2021-12-18 19:37:00,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502300384] [2021-12-18 19:37:00,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:00,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 19:37:00,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:00,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 19:37:00,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2021-12-18 19:37:00,043 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand has 44 states, 43 states have (on average 6.325581395348837) internal successors, (272), 44 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:00,594 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2021-12-18 19:37:00,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 19:37:00,594 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 6.325581395348837) internal successors, (272), 44 states have internal predecessors, (272), 0 states have call successors, (0), 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 159 [2021-12-18 19:37:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:00,595 INFO L225 Difference]: With dead ends: 190 [2021-12-18 19:37:00,595 INFO L226 Difference]: Without dead ends: 190 [2021-12-18 19:37:00,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 292 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2021-12-18 19:37:00,596 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 656 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:00,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 940 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:37:00,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-18 19:37:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 179. [2021-12-18 19:37:00,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 175 states have (on average 1.04) internal successors, (182), 178 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:00,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 182 transitions. [2021-12-18 19:37:00,598 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 182 transitions. Word has length 159 [2021-12-18 19:37:00,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:00,599 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 182 transitions. [2021-12-18 19:37:00,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 6.325581395348837) internal successors, (272), 44 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 182 transitions. [2021-12-18 19:37:00,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-18 19:37:00,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:00,600 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:00,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:00,811 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,SelfDestructingSolverStorable43 [2021-12-18 19:37:00,811 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:37:00,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:00,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1473057091, now seen corresponding path program 9 times [2021-12-18 19:37:00,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:00,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100523340] [2021-12-18 19:37:00,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:00,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 66 proven. 366 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:37:01,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:01,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100523340] [2021-12-18 19:37:01,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100523340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:01,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910529922] [2021-12-18 19:37:01,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:37:01,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:01,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:01,126 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) [2021-12-18 19:37:01,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 19:37:01,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-18 19:37:01,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:01,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-18 19:37:01,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:01,915 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:37:01,916 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 [2021-12-18 19:37:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 91 proven. 341 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:37:02,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 120 proven. 312 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:37:04,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910529922] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:04,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:04,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 60 [2021-12-18 19:37:04,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471662864] [2021-12-18 19:37:04,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:04,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-18 19:37:04,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:04,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-18 19:37:04,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=3179, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:37:04,226 INFO L87 Difference]: Start difference. First operand 179 states and 182 transitions. Second operand has 61 states, 60 states have (on average 6.466666666666667) internal successors, (388), 61 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:04,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:04,945 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2021-12-18 19:37:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 19:37:04,946 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 6.466666666666667) internal successors, (388), 61 states have internal predecessors, (388), 0 states have call successors, (0), 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 160 [2021-12-18 19:37:04,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:04,946 INFO L225 Difference]: With dead ends: 188 [2021-12-18 19:37:04,947 INFO L226 Difference]: Without dead ends: 184 [2021-12-18 19:37:04,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1187, Invalid=4975, Unknown=0, NotChecked=0, Total=6162 [2021-12-18 19:37:04,947 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1045 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:04,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1045 Valid, 790 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:37:04,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-18 19:37:04,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 178. [2021-12-18 19:37:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 174 states have (on average 1.0344827586206897) internal successors, (180), 177 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2021-12-18 19:37:04,950 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 160 [2021-12-18 19:37:04,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:04,951 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2021-12-18 19:37:04,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 6.466666666666667) internal successors, (388), 61 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:04,951 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2021-12-18 19:37:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-18 19:37:04,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:04,952 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:04,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:05,167 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,SelfDestructingSolverStorable44 [2021-12-18 19:37:05,168 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:37:05,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:05,168 INFO L85 PathProgramCache]: Analyzing trace with hash 2026679580, now seen corresponding path program 15 times [2021-12-18 19:37:05,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:05,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989356177] [2021-12-18 19:37:05,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:05,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 27 proven. 480 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:37:05,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:05,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989356177] [2021-12-18 19:37:05,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989356177] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:05,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867808286] [2021-12-18 19:37:05,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:37:05,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:05,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:05,632 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) [2021-12-18 19:37:05,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 19:37:06,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-18 19:37:06,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:06,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-18 19:37:06,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:06,600 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 [2021-12-18 19:37:07,276 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 [2021-12-18 19:37:08,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:37:08,501 INFO L354 Elim1Store]: treesize reduction 27, result has 10.0 percent of original size [2021-12-18 19:37:08,502 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 13 [2021-12-18 19:37:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 27 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:08,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:12,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:37:12,110 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 91 treesize of output 91 [2021-12-18 19:37:12,126 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 36 treesize of output 32 [2021-12-18 19:37:12,876 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 27 proven. 480 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:37:12,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867808286] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:12,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:12,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 40, 29] total 85 [2021-12-18 19:37:12,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251730744] [2021-12-18 19:37:12,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:12,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-18 19:37:12,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:12,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-18 19:37:12,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=6889, Unknown=0, NotChecked=0, Total=7140 [2021-12-18 19:37:12,883 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand has 85 states, 85 states have (on average 5.070588235294117) internal successors, (431), 85 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:16,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:16,469 INFO L93 Difference]: Finished difference Result 509 states and 514 transitions. [2021-12-18 19:37:16,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-18 19:37:16,470 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 5.070588235294117) internal successors, (431), 85 states have internal predecessors, (431), 0 states have call successors, (0), 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 169 [2021-12-18 19:37:16,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:16,474 INFO L225 Difference]: With dead ends: 509 [2021-12-18 19:37:16,474 INFO L226 Difference]: Without dead ends: 192 [2021-12-18 19:37:16,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3050 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=853, Invalid=19453, Unknown=0, NotChecked=0, Total=20306 [2021-12-18 19:37:16,475 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 301 mSDsluCounter, 4861 mSDsCounter, 0 mSdLazyCounter, 2770 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 4943 SdHoareTripleChecker+Invalid, 4132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1238 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:16,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 4943 Invalid, 4132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2770 Invalid, 0 Unknown, 1238 Unchecked, 0.8s Time] [2021-12-18 19:37:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-18 19:37:16,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 186. [2021-12-18 19:37:16,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 182 states have (on average 1.032967032967033) internal successors, (188), 185 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:16,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2021-12-18 19:37:16,479 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 169 [2021-12-18 19:37:16,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:16,479 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2021-12-18 19:37:16,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 5.070588235294117) internal successors, (431), 85 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:16,480 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2021-12-18 19:37:16,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-18 19:37:16,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:16,480 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:16,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:16,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-18 19:37:16,691 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:37:16,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:16,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1674389986, now seen corresponding path program 16 times [2021-12-18 19:37:16,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:16,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948738713] [2021-12-18 19:37:16,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:16,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 91 proven. 449 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:37:16,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:16,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948738713] [2021-12-18 19:37:16,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948738713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:16,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44652790] [2021-12-18 19:37:16,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:37:16,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:16,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:16,990 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:16,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 19:37:17,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:37:17,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:17,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 19:37:17,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 120 proven. 420 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:37:17,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:18,427 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 [2021-12-18 19:37:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 120 proven. 420 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:37:18,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44652790] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:18,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:18,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 47 [2021-12-18 19:37:18,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861290075] [2021-12-18 19:37:18,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:18,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-18 19:37:18,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:18,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-18 19:37:18,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 19:37:18,554 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand has 48 states, 47 states have (on average 6.382978723404255) internal successors, (300), 48 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:19,219 INFO L93 Difference]: Finished difference Result 208 states and 210 transitions. [2021-12-18 19:37:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 19:37:19,220 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 6.382978723404255) internal successors, (300), 48 states have internal predecessors, (300), 0 states have call successors, (0), 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 177 [2021-12-18 19:37:19,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:19,221 INFO L225 Difference]: With dead ends: 208 [2021-12-18 19:37:19,221 INFO L226 Difference]: Without dead ends: 208 [2021-12-18 19:37:19,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 326 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=690, Invalid=2970, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:37:19,222 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 828 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:19,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 1170 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:37:19,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-18 19:37:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 197. [2021-12-18 19:37:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 196 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2021-12-18 19:37:19,225 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 177 [2021-12-18 19:37:19,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:19,225 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2021-12-18 19:37:19,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 6.382978723404255) internal successors, (300), 48 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:19,225 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2021-12-18 19:37:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-18 19:37:19,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:19,226 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:19,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-18 19:37:19,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:19,448 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:37:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:19,449 INFO L85 PathProgramCache]: Analyzing trace with hash 366482028, now seen corresponding path program 10 times [2021-12-18 19:37:19,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:19,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489229013] [2021-12-18 19:37:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:19,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 91 proven. 458 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:37:19,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:19,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489229013] [2021-12-18 19:37:19,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489229013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:19,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311902464] [2021-12-18 19:37:19,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:37:19,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:19,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:19,800 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:19,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-18 19:37:20,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:37:20,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:20,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 19:37:20,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 120 proven. 429 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:37:20,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:21,268 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 [2021-12-18 19:37:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 120 proven. 429 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:37:21,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311902464] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:21,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:21,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 48 [2021-12-18 19:37:21,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799860678] [2021-12-18 19:37:21,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:21,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 19:37:21,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:21,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 19:37:21,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=2058, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 19:37:21,349 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand has 49 states, 48 states have (on average 6.270833333333333) internal successors, (301), 49 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) [2021-12-18 19:37:21,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:21,883 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2021-12-18 19:37:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 19:37:21,883 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 6.270833333333333) internal successors, (301), 49 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) Word has length 178 [2021-12-18 19:37:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:21,884 INFO L225 Difference]: With dead ends: 206 [2021-12-18 19:37:21,884 INFO L226 Difference]: Without dead ends: 202 [2021-12-18 19:37:21,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 328 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=684, Invalid=2976, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:37:21,884 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 701 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:21,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 1188 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:37:21,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-18 19:37:21,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2021-12-18 19:37:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 192 states have (on average 1.03125) internal successors, (198), 195 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2021-12-18 19:37:21,887 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 178 [2021-12-18 19:37:21,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:21,887 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2021-12-18 19:37:21,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 6.270833333333333) internal successors, (301), 49 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) [2021-12-18 19:37:21,887 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2021-12-18 19:37:21,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-18 19:37:21,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:21,887 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:21,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:22,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-18 19:37:22,088 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:37:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:22,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1653391795, now seen corresponding path program 17 times [2021-12-18 19:37:22,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:22,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270909536] [2021-12-18 19:37:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:22,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 30 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:23,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:23,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270909536] [2021-12-18 19:37:23,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270909536] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:23,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83226727] [2021-12-18 19:37:23,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:37:23,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:23,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:23,100 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:23,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-18 19:37:23,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-18 19:37:23,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:23,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-18 19:37:23,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:24,273 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 [2021-12-18 19:37:24,750 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 [2021-12-18 19:37:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:37:24,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:25,099 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 [2021-12-18 19:37:25,101 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 [2021-12-18 19:37:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:37:25,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83226727] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:25,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:25,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 31, 31] total 66 [2021-12-18 19:37:25,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428666833] [2021-12-18 19:37:25,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:25,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-18 19:37:25,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:25,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-18 19:37:25,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=4100, Unknown=0, NotChecked=0, Total=4290 [2021-12-18 19:37:25,382 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 66 states, 66 states have (on average 4.075757575757576) internal successors, (269), 66 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:29,381 INFO L93 Difference]: Finished difference Result 579 states and 583 transitions. [2021-12-18 19:37:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-18 19:37:29,381 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.075757575757576) internal successors, (269), 66 states have internal predecessors, (269), 0 states have call successors, (0), 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 187 [2021-12-18 19:37:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:29,382 INFO L225 Difference]: With dead ends: 579 [2021-12-18 19:37:29,382 INFO L226 Difference]: Without dead ends: 371 [2021-12-18 19:37:29,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 348 SyntacticMatches, 6 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2951 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=956, Invalid=13806, Unknown=0, NotChecked=0, Total=14762 [2021-12-18 19:37:29,383 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1257 mSDsluCounter, 4458 mSDsCounter, 0 mSdLazyCounter, 5515 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1257 SdHoareTripleChecker+Valid, 4547 SdHoareTripleChecker+Invalid, 6085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 5515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:29,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1257 Valid, 4547 Invalid, 6085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 5515 Invalid, 0 Unknown, 410 Unchecked, 1.9s Time] [2021-12-18 19:37:29,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-18 19:37:29,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 200. [2021-12-18 19:37:29,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 196 states have (on average 1.030612244897959) internal successors, (202), 199 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2021-12-18 19:37:29,386 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 187 [2021-12-18 19:37:29,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:29,386 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2021-12-18 19:37:29,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.075757575757576) internal successors, (269), 66 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2021-12-18 19:37:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-18 19:37:29,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:29,387 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:29,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:29,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-18 19:37:29,603 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:37:29,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:29,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1742487472, now seen corresponding path program 18 times [2021-12-18 19:37:29,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:29,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123787200] [2021-12-18 19:37:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:29,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 30 proven. 793 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:30,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:30,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123787200] [2021-12-18 19:37:30,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123787200] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:30,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600882769] [2021-12-18 19:37:30,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:37:30,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:30,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:30,577 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:30,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-18 19:37:31,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-18 19:37:31,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:31,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-18 19:37:31,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:31,800 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 [2021-12-18 19:37:32,447 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 [2021-12-18 19:37:32,510 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 [2021-12-18 19:37:33,553 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 [2021-12-18 19:37:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:37:33,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:33,835 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1925 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1925) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) 0)) is different from false [2021-12-18 19:37:33,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:37:33,841 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 [2021-12-18 19:37:33,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:37:33,847 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 [2021-12-18 19:37:33,851 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 [2021-12-18 19:37:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 30 proven. 603 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:37:34,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600882769] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:34,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:34,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 27, 28] total 63 [2021-12-18 19:37:34,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813342717] [2021-12-18 19:37:34,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:34,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-18 19:37:34,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:34,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-18 19:37:34,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3584, Unknown=1, NotChecked=120, Total=3906 [2021-12-18 19:37:34,359 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand has 63 states, 63 states have (on average 5.365079365079365) internal successors, (338), 63 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:35,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:35,838 INFO L93 Difference]: Finished difference Result 356 states and 359 transitions. [2021-12-18 19:37:35,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-18 19:37:35,839 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 5.365079365079365) internal successors, (338), 63 states have internal predecessors, (338), 0 states have call successors, (0), 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 191 [2021-12-18 19:37:35,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:35,840 INFO L225 Difference]: With dead ends: 356 [2021-12-18 19:37:35,840 INFO L226 Difference]: Without dead ends: 207 [2021-12-18 19:37:35,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 353 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=389, Invalid=6924, Unknown=1, NotChecked=168, Total=7482 [2021-12-18 19:37:35,841 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 160 mSDsluCounter, 3331 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 3425 SdHoareTripleChecker+Invalid, 2850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:35,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 3425 Invalid, 2850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2348 Invalid, 0 Unknown, 459 Unchecked, 0.7s Time] [2021-12-18 19:37:35,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-18 19:37:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2021-12-18 19:37:35,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 200 states have (on average 1.03) internal successors, (206), 203 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2021-12-18 19:37:35,858 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 191 [2021-12-18 19:37:35,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:35,859 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2021-12-18 19:37:35,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 5.365079365079365) internal successors, (338), 63 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:35,859 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2021-12-18 19:37:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-18 19:37:35,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:35,860 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:35,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-18 19:37:36,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-18 19:37:36,078 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:37:36,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:36,079 INFO L85 PathProgramCache]: Analyzing trace with hash -471861869, now seen corresponding path program 19 times [2021-12-18 19:37:36,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:36,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078398278] [2021-12-18 19:37:36,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:36,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 120 proven. 550 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:37:36,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:36,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078398278] [2021-12-18 19:37:36,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078398278] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:36,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826936666] [2021-12-18 19:37:36,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:37:36,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:36,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:36,451 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:36,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-18 19:37:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:36,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-18 19:37:36,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:36,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:37:36,705 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 [2021-12-18 19:37:36,707 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 [2021-12-18 19:37:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 153 proven. 517 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:37:37,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 190 proven. 480 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:37:39,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826936666] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:39,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:39,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2021-12-18 19:37:39,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086308451] [2021-12-18 19:37:39,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:39,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-18 19:37:39,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:39,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-18 19:37:39,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=4344, Unknown=0, NotChecked=0, Total=4830 [2021-12-18 19:37:39,474 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand has 70 states, 69 states have (on average 6.7101449275362315) internal successors, (463), 70 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:40,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:40,711 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2021-12-18 19:37:40,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 19:37:40,712 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 6.7101449275362315) internal successors, (463), 70 states have internal predecessors, (463), 0 states have call successors, (0), 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 195 [2021-12-18 19:37:40,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:40,712 INFO L225 Difference]: With dead ends: 226 [2021-12-18 19:37:40,713 INFO L226 Difference]: Without dead ends: 226 [2021-12-18 19:37:40,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1383, Invalid=7173, Unknown=0, NotChecked=0, Total=8556 [2021-12-18 19:37:40,713 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1055 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:40,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1055 Valid, 1547 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:37:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-18 19:37:40,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 215. [2021-12-18 19:37:40,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 211 states have (on average 1.033175355450237) internal successors, (218), 214 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:40,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 218 transitions. [2021-12-18 19:37:40,715 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 218 transitions. Word has length 195 [2021-12-18 19:37:40,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:40,716 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 218 transitions. [2021-12-18 19:37:40,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 6.7101449275362315) internal successors, (463), 70 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:40,716 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 218 transitions. [2021-12-18 19:37:40,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-18 19:37:40,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:40,716 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:40,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:40,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:40,927 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:37:40,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:40,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1742816037, now seen corresponding path program 11 times [2021-12-18 19:37:40,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:40,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055446453] [2021-12-18 19:37:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:40,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 120 proven. 560 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:37:41,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:41,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055446453] [2021-12-18 19:37:41,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055446453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:41,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221779528] [2021-12-18 19:37:41,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:37:41,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:41,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:41,477 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:41,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-18 19:37:42,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-18 19:37:42,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:42,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-18 19:37:42,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:42,284 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:37:42,284 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 [2021-12-18 19:37:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 153 proven. 527 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:37:43,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 190 proven. 490 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:37:45,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221779528] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:45,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:45,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 69 [2021-12-18 19:37:45,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796017576] [2021-12-18 19:37:45,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:45,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-18 19:37:45,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:45,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-18 19:37:45,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=4180, Unknown=0, NotChecked=0, Total=4830 [2021-12-18 19:37:45,008 INFO L87 Difference]: Start difference. First operand 215 states and 218 transitions. Second operand has 70 states, 69 states have (on average 6.681159420289855) internal successors, (461), 70 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:45,845 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2021-12-18 19:37:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:37:45,845 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 6.681159420289855) internal successors, (461), 70 states have internal predecessors, (461), 0 states have call successors, (0), 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 196 [2021-12-18 19:37:45,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:45,846 INFO L225 Difference]: With dead ends: 224 [2021-12-18 19:37:45,846 INFO L226 Difference]: Without dead ends: 220 [2021-12-18 19:37:45,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1242, Invalid=5564, Unknown=0, NotChecked=0, Total=6806 [2021-12-18 19:37:45,847 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 985 mSDsluCounter, 1366 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:45,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [985 Valid, 1456 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:37:45,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-18 19:37:45,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 214. [2021-12-18 19:37:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 210 states have (on average 1.0285714285714285) internal successors, (216), 213 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:45,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2021-12-18 19:37:45,849 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 196 [2021-12-18 19:37:45,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:45,849 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2021-12-18 19:37:45,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 6.681159420289855) internal successors, (461), 70 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2021-12-18 19:37:45,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-18 19:37:45,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:45,850 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:45,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:46,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-12-18 19:37:46,059 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:37:46,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:46,060 INFO L85 PathProgramCache]: Analyzing trace with hash -85729090, now seen corresponding path program 20 times [2021-12-18 19:37:46,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:46,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368408130] [2021-12-18 19:37:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:46,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 33 proven. 740 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:37:46,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:46,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368408130] [2021-12-18 19:37:46,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368408130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:46,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126454751] [2021-12-18 19:37:46,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:37:46,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:46,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:46,812 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:46,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-18 19:37:47,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:37:47,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:47,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-18 19:37:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:47,604 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 [2021-12-18 19:37:49,505 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 [2021-12-18 19:37:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 33 proven. 740 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:37:49,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:52,502 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:37:52,502 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 91 treesize of output 91 [2021-12-18 19:37:52,544 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 36 treesize of output 32 [2021-12-18 19:37:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 33 proven. 740 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 19:37:52,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126454751] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:52,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:52,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 33, 33] total 74 [2021-12-18 19:37:52,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933040229] [2021-12-18 19:37:52,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:52,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-18 19:37:52,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:52,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-18 19:37:52,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=5216, Unknown=0, NotChecked=0, Total=5402 [2021-12-18 19:37:52,913 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand has 74 states, 74 states have (on average 5.95945945945946) internal successors, (441), 74 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:56,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:56,856 INFO L93 Difference]: Finished difference Result 611 states and 616 transitions. [2021-12-18 19:37:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-12-18 19:37:56,856 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 5.95945945945946) internal successors, (441), 74 states have internal predecessors, (441), 0 states have call successors, (0), 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 205 [2021-12-18 19:37:56,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:56,857 INFO L225 Difference]: With dead ends: 611 [2021-12-18 19:37:56,857 INFO L226 Difference]: Without dead ends: 228 [2021-12-18 19:37:56,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 364 SyntacticMatches, 15 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 12 DeprecatedPredicates, 3209 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=570, Invalid=15942, Unknown=0, NotChecked=0, Total=16512 [2021-12-18 19:37:56,868 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 139 mSDsluCounter, 4893 mSDsCounter, 0 mSdLazyCounter, 2943 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 4990 SdHoareTripleChecker+Invalid, 4295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1308 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:56,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 4990 Invalid, 4295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2943 Invalid, 0 Unknown, 1308 Unchecked, 1.0s Time] [2021-12-18 19:37:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-18 19:37:56,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 222. [2021-12-18 19:37:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 218 states have (on average 1.0275229357798166) internal successors, (224), 221 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2021-12-18 19:37:56,882 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 205 [2021-12-18 19:37:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:56,882 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2021-12-18 19:37:56,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 5.95945945945946) internal successors, (441), 74 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:56,883 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2021-12-18 19:37:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-18 19:37:56,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:56,884 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:56,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:57,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:57,103 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:37:57,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:57,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1278947972, now seen corresponding path program 21 times [2021-12-18 19:37:57,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:57,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372318270] [2021-12-18 19:37:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:57,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 153 proven. 661 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 19:37:57,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:57,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372318270] [2021-12-18 19:37:57,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372318270] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:57,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11414820] [2021-12-18 19:37:57,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:37:57,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:57,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:57,507 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:57,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-18 19:37:58,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-18 19:37:58,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:58,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-18 19:37:58,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:58,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:37:58,725 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 [2021-12-18 19:37:58,728 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 [2021-12-18 19:38:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 190 proven. 624 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 19:38:00,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 231 proven. 583 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 19:38:02,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11414820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:02,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:02,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 76 [2021-12-18 19:38:02,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81049851] [2021-12-18 19:38:02,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:02,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-18 19:38:02,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:02,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-18 19:38:02,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=5161, Unknown=0, NotChecked=0, Total=5852 [2021-12-18 19:38:02,011 INFO L87 Difference]: Start difference. First operand 222 states and 224 transitions. Second operand has 77 states, 76 states have (on average 6.723684210526316) internal successors, (511), 77 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:03,678 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2021-12-18 19:38:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 19:38:03,679 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 6.723684210526316) internal successors, (511), 77 states have internal predecessors, (511), 0 states have call successors, (0), 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 213 [2021-12-18 19:38:03,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:03,680 INFO L225 Difference]: With dead ends: 244 [2021-12-18 19:38:03,680 INFO L226 Difference]: Without dead ends: 244 [2021-12-18 19:38:03,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1833, Invalid=8469, Unknown=0, NotChecked=0, Total=10302 [2021-12-18 19:38:03,681 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1447 mSDsluCounter, 1292 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:03,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 1389 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:38:03,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-18 19:38:03,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 233. [2021-12-18 19:38:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 229 states have (on average 1.0305676855895196) internal successors, (236), 232 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 236 transitions. [2021-12-18 19:38:03,692 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 236 transitions. Word has length 213 [2021-12-18 19:38:03,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:03,703 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 236 transitions. [2021-12-18 19:38:03,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 6.723684210526316) internal successors, (511), 77 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 236 transitions. [2021-12-18 19:38:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-18 19:38:03,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:03,705 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:03,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-18 19:38:03,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-18 19:38:03,919 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:38:03,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:03,920 INFO L85 PathProgramCache]: Analyzing trace with hash 992681482, now seen corresponding path program 12 times [2021-12-18 19:38:03,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:03,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724380810] [2021-12-18 19:38:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:03,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 153 proven. 672 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 19:38:04,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:04,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724380810] [2021-12-18 19:38:04,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724380810] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:04,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609049959] [2021-12-18 19:38:04,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:38:04,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:04,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:04,460 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:04,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-18 19:38:06,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-18 19:38:06,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:06,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-18 19:38:06,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:06,403 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:38:06,403 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 [2021-12-18 19:38:06,739 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 [2021-12-18 19:38:07,154 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-12-18 19:38:07,154 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 30 treesize of output 38 [2021-12-18 19:38:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 50 proven. 64 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2021-12-18 19:38:07,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:10,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:38:10,549 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 87 treesize of output 87 [2021-12-18 19:38:10,562 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 30 treesize of output 28 [2021-12-18 19:38:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2021-12-18 19:38:11,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609049959] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:11,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:11,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 11, 11] total 46 [2021-12-18 19:38:11,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144753450] [2021-12-18 19:38:11,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:11,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-18 19:38:11,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-18 19:38:11,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-12-18 19:38:11,493 INFO L87 Difference]: Start difference. First operand 233 states and 236 transitions. Second operand has 47 states, 46 states have (on average 5.304347826086956) internal successors, (244), 47 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:14,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:14,805 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2021-12-18 19:38:14,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-18 19:38:14,806 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 5.304347826086956) internal successors, (244), 47 states have internal predecessors, (244), 0 states have call successors, (0), 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 214 [2021-12-18 19:38:14,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:14,807 INFO L225 Difference]: With dead ends: 231 [2021-12-18 19:38:14,807 INFO L226 Difference]: Without dead ends: 227 [2021-12-18 19:38:14,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 397 SyntacticMatches, 11 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2761 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2515, Invalid=9917, Unknown=0, NotChecked=0, Total=12432 [2021-12-18 19:38:14,809 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 1321 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1321 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:14,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1321 Valid, 1058 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1615 Invalid, 0 Unknown, 159 Unchecked, 0.8s Time] [2021-12-18 19:38:14,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-18 19:38:14,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-12-18 19:38:14,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.0177777777777777) internal successors, (229), 226 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:14,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2021-12-18 19:38:14,820 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 214 [2021-12-18 19:38:14,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:14,820 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2021-12-18 19:38:14,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 5.304347826086956) internal successors, (244), 47 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:14,821 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2021-12-18 19:38:14,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-18 19:38:14,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:14,822 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:14,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-18 19:38:15,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:15,034 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:38:15,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:15,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1297062801, now seen corresponding path program 22 times [2021-12-18 19:38:15,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:15,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792902534] [2021-12-18 19:38:15,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:15,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 36 proven. 891 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 19:38:15,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792902534] [2021-12-18 19:38:15,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792902534] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:15,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828002611] [2021-12-18 19:38:15,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:38:15,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:15,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:15,631 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:15,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-18 19:38:16,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:38:16,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:16,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-18 19:38:16,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:16,883 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 [2021-12-18 19:38:18,668 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 [2021-12-18 19:38:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 36 proven. 891 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 19:38:18,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:20,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:38:20,732 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 91 treesize of output 91 [2021-12-18 19:38:20,763 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 36 treesize of output 32 [2021-12-18 19:38:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 36 proven. 891 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 19:38:21,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828002611] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:21,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:21,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 35, 35] total 79 [2021-12-18 19:38:21,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130166506] [2021-12-18 19:38:21,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:21,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-18 19:38:21,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:21,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-18 19:38:21,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=5964, Unknown=0, NotChecked=0, Total=6162 [2021-12-18 19:38:21,068 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand has 79 states, 79 states have (on average 6.063291139240507) internal successors, (479), 79 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:25,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:25,397 INFO L93 Difference]: Finished difference Result 658 states and 663 transitions. [2021-12-18 19:38:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-12-18 19:38:25,397 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 6.063291139240507) internal successors, (479), 79 states have internal predecessors, (479), 0 states have call successors, (0), 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 223 [2021-12-18 19:38:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:25,398 INFO L225 Difference]: With dead ends: 658 [2021-12-18 19:38:25,398 INFO L226 Difference]: Without dead ends: 241 [2021-12-18 19:38:25,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 397 SyntacticMatches, 16 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 13 DeprecatedPredicates, 3616 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=598, Invalid=18034, Unknown=0, NotChecked=0, Total=18632 [2021-12-18 19:38:25,399 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 149 mSDsluCounter, 5828 mSDsCounter, 0 mSdLazyCounter, 3650 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5929 SdHoareTripleChecker+Invalid, 5260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 3650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1561 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:25,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5929 Invalid, 5260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 3650 Invalid, 0 Unknown, 1561 Unchecked, 1.2s Time] [2021-12-18 19:38:25,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-18 19:38:25,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 235. [2021-12-18 19:38:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 233 states have (on average 1.0171673819742488) internal successors, (237), 234 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2021-12-18 19:38:25,401 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 223 [2021-12-18 19:38:25,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:25,401 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2021-12-18 19:38:25,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 6.063291139240507) internal successors, (479), 79 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:25,401 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2021-12-18 19:38:25,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-12-18 19:38:25,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:25,402 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:25,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-18 19:38:25,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-18 19:38:25,602 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:38:25,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:25,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1503178933, now seen corresponding path program 23 times [2021-12-18 19:38:25,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:25,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626996646] [2021-12-18 19:38:25,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:25,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 190 proven. 782 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 19:38:26,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:26,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626996646] [2021-12-18 19:38:26,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626996646] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:26,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926235333] [2021-12-18 19:38:26,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:38:26,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:26,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:26,113 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:26,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-18 19:38:27,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-18 19:38:27,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:27,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 892 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 19:38:27,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:27,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:27,276 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 [2021-12-18 19:38:27,279 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 [2021-12-18 19:38:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 231 proven. 741 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 19:38:28,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 276 proven. 696 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 19:38:30,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926235333] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:30,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:30,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 78 [2021-12-18 19:38:30,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033296263] [2021-12-18 19:38:30,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:30,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-18 19:38:30,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:30,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-18 19:38:30,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=5470, Unknown=0, NotChecked=0, Total=6162 [2021-12-18 19:38:30,747 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand has 79 states, 78 states have (on average 6.935897435897436) internal successors, (541), 79 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:31,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:31,899 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2021-12-18 19:38:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 19:38:31,900 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 6.935897435897436) internal successors, (541), 79 states have internal predecessors, (541), 0 states have call successors, (0), 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 231 [2021-12-18 19:38:31,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:31,900 INFO L225 Difference]: With dead ends: 254 [2021-12-18 19:38:31,900 INFO L226 Difference]: Without dead ends: 252 [2021-12-18 19:38:31,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 409 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1441, Invalid=7489, Unknown=0, NotChecked=0, Total=8930 [2021-12-18 19:38:31,901 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 1254 mSDsluCounter, 1994 mSDsCounter, 0 mSdLazyCounter, 2197 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 2328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:31,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1254 Valid, 2097 Invalid, 2328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2197 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 19:38:31,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-18 19:38:31,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 245. [2021-12-18 19:38:31,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 243 states have (on average 1.0164609053497942) internal successors, (247), 244 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:31,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2021-12-18 19:38:31,908 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 231 [2021-12-18 19:38:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:31,909 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2021-12-18 19:38:31,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 6.935897435897436) internal successors, (541), 79 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:31,909 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2021-12-18 19:38:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-18 19:38:31,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:31,910 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:31,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-18 19:38:32,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-18 19:38:32,124 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:38:32,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:32,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2140051808, now seen corresponding path program 24 times [2021-12-18 19:38:32,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:32,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327943483] [2021-12-18 19:38:32,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:32,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 39 proven. 1056 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 19:38:32,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:32,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327943483] [2021-12-18 19:38:32,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327943483] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:32,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862819456] [2021-12-18 19:38:32,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:38:32,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:32,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:32,884 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:32,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-18 19:38:35,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-18 19:38:35,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:35,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-18 19:38:35,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:35,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:38:35,888 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 [2021-12-18 19:38:36,768 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 [2021-12-18 19:38:36,839 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 26 treesize of output 25 [2021-12-18 19:38:39,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:38:39,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 29 treesize of output 21 [2021-12-18 19:38:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 50 proven. 279 refuted. 0 times theorem prover too weak. 1042 trivial. 0 not checked. [2021-12-18 19:38:39,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:41,352 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 [2021-12-18 19:38:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2021-12-18 19:38:42,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862819456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:42,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:42,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 10, 9] total 50 [2021-12-18 19:38:42,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362668664] [2021-12-18 19:38:42,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:42,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-18 19:38:42,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:42,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-18 19:38:42,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2331, Unknown=0, NotChecked=0, Total=2450 [2021-12-18 19:38:42,848 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand has 50 states, 50 states have (on average 5.64) internal successors, (282), 50 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:46,747 INFO L93 Difference]: Finished difference Result 435 states and 438 transitions. [2021-12-18 19:38:46,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-18 19:38:46,748 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.64) internal successors, (282), 50 states have internal predecessors, (282), 0 states have call successors, (0), 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 241 [2021-12-18 19:38:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:46,750 INFO L225 Difference]: With dead ends: 435 [2021-12-18 19:38:46,750 INFO L226 Difference]: Without dead ends: 251 [2021-12-18 19:38:46,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 479 SyntacticMatches, 15 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3304 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=923, Invalid=14329, Unknown=0, NotChecked=0, Total=15252 [2021-12-18 19:38:46,751 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 51 mSDsluCounter, 2934 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 3022 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:46,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 3022 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1395 Invalid, 0 Unknown, 158 Unchecked, 0.4s Time] [2021-12-18 19:38:46,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-18 19:38:46,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 247. [2021-12-18 19:38:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.0121951219512195) internal successors, (249), 246 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:46,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2021-12-18 19:38:46,772 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 241 [2021-12-18 19:38:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:46,772 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2021-12-18 19:38:46,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.64) internal successors, (282), 50 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2021-12-18 19:38:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-18 19:38:46,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:46,774 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:46,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-18 19:38:46,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-18 19:38:46,991 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 19:38:46,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:46,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2091829222, now seen corresponding path program 1 times [2021-12-18 19:38:46,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:46,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29912433] [2021-12-18 19:38:46,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:46,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1420 backedges. 231 proven. 913 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 19:38:47,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:47,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29912433] [2021-12-18 19:38:47,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29912433] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:47,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984015075] [2021-12-18 19:38:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:47,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:47,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:47,342 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:47,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-18 19:38:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:47,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-18 19:38:47,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1420 backedges. 146 proven. 1 refuted. 0 times theorem prover too weak. 1273 trivial. 0 not checked. [2021-12-18 19:38:48,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1420 backedges. 146 proven. 1 refuted. 0 times theorem prover too weak. 1273 trivial. 0 not checked. [2021-12-18 19:38:48,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984015075] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:48,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:48,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7, 7] total 37 [2021-12-18 19:38:48,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958629210] [2021-12-18 19:38:48,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:48,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 19:38:48,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:48,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 19:38:48,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 19:38:48,341 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand has 37 states, 37 states have (on average 6.594594594594595) internal successors, (244), 37 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:51,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:51,302 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2021-12-18 19:38:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-18 19:38:51,302 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.594594594594595) internal successors, (244), 37 states have internal predecessors, (244), 0 states have call successors, (0), 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 246 [2021-12-18 19:38:51,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:51,303 INFO L225 Difference]: With dead ends: 262 [2021-12-18 19:38:51,303 INFO L226 Difference]: Without dead ends: 0 [2021-12-18 19:38:51,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 484 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3195 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2160, Invalid=11180, Unknown=0, NotChecked=0, Total=13340 [2021-12-18 19:38:51,304 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 1210 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 3101 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 3399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 3101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:51,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1210 Valid, 1068 Invalid, 3399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 3101 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-18 19:38:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-18 19:38:51,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-18 19:38:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-18 19:38:51,311 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 246 [2021-12-18 19:38:51,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:51,312 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-18 19:38:51,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.594594594594595) internal successors, (244), 37 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:51,312 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-18 19:38:51,312 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-18 19:38:51,314 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (18 of 19 remaining) [2021-12-18 19:38:51,314 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (17 of 19 remaining) [2021-12-18 19:38:51,314 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (16 of 19 remaining) [2021-12-18 19:38:51,314 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (15 of 19 remaining) [2021-12-18 19:38:51,315 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (14 of 19 remaining) [2021-12-18 19:38:51,315 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (13 of 19 remaining) [2021-12-18 19:38:51,315 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (12 of 19 remaining) [2021-12-18 19:38:51,315 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (11 of 19 remaining) [2021-12-18 19:38:51,315 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (10 of 19 remaining) [2021-12-18 19:38:51,315 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (9 of 19 remaining) [2021-12-18 19:38:51,315 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (8 of 19 remaining) [2021-12-18 19:38:51,315 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION (7 of 19 remaining) [2021-12-18 19:38:51,315 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATION (6 of 19 remaining) [2021-12-18 19:38:51,316 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATION (5 of 19 remaining) [2021-12-18 19:38:51,316 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATION (4 of 19 remaining) [2021-12-18 19:38:51,316 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATION (3 of 19 remaining) [2021-12-18 19:38:51,316 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATION (2 of 19 remaining) [2021-12-18 19:38:51,316 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATION (1 of 19 remaining) [2021-12-18 19:38:51,316 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2021-12-18 19:38:51,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-18 19:38:51,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-18 19:38:51,534 INFO L732 BasicCegarLoop]: Path program histogram: [24, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:51,535 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-18 19:38:51,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 07:38:51 BoogieIcfgContainer [2021-12-18 19:38:51,536 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-18 19:38:51,536 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-18 19:38:51,536 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-18 19:38:51,536 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-18 19:38:51,537 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:35:40" (3/4) ... [2021-12-18 19:38:51,538 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-18 19:38:51,550 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-12-18 19:38:51,550 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-18 19:38:51,550 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-18 19:38:51,551 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-18 19:38:51,582 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-18 19:38:51,583 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-18 19:38:51,583 INFO L158 Benchmark]: Toolchain (without parser) took 192277.06ms. Allocated memory was 111.1MB in the beginning and 314.6MB in the end (delta: 203.4MB). Free memory was 84.7MB in the beginning and 134.6MB in the end (delta: -49.9MB). Peak memory consumption was 152.3MB. Max. memory is 16.1GB. [2021-12-18 19:38:51,583 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 77.6MB. Free memory is still 41.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 19:38:51,583 INFO L158 Benchmark]: CACSL2BoogieTranslator took 399.69ms. Allocated memory is still 111.1MB. Free memory was 84.6MB in the beginning and 80.2MB in the end (delta: 4.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-18 19:38:51,583 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.93ms. Allocated memory is still 111.1MB. Free memory was 80.2MB in the beginning and 78.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 19:38:51,583 INFO L158 Benchmark]: Boogie Preprocessor took 68.29ms. Allocated memory is still 111.1MB. Free memory was 78.1MB in the beginning and 76.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-18 19:38:51,584 INFO L158 Benchmark]: RCFGBuilder took 308.32ms. Allocated memory is still 111.1MB. Free memory was 76.6MB in the beginning and 63.0MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-18 19:38:51,584 INFO L158 Benchmark]: TraceAbstraction took 191400.96ms. Allocated memory was 111.1MB in the beginning and 314.6MB in the end (delta: 203.4MB). Free memory was 62.5MB in the beginning and 137.7MB in the end (delta: -75.2MB). Peak memory consumption was 130.5MB. Max. memory is 16.1GB. [2021-12-18 19:38:51,585 INFO L158 Benchmark]: Witness Printer took 46.35ms. Allocated memory is still 314.6MB. Free memory was 137.7MB in the beginning and 134.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-18 19:38:51,586 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 77.6MB. Free memory is still 41.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 399.69ms. Allocated memory is still 111.1MB. Free memory was 84.6MB in the beginning and 80.2MB in the end (delta: 4.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.93ms. Allocated memory is still 111.1MB. Free memory was 80.2MB in the beginning and 78.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.29ms. Allocated memory is still 111.1MB. Free memory was 78.1MB in the beginning and 76.6MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 308.32ms. Allocated memory is still 111.1MB. Free memory was 76.6MB in the beginning and 63.0MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 191400.96ms. Allocated memory was 111.1MB in the beginning and 314.6MB in the end (delta: 203.4MB). Free memory was 62.5MB in the beginning and 137.7MB in the end (delta: -75.2MB). Peak memory consumption was 130.5MB. Max. memory is 16.1GB. * Witness Printer took 46.35ms. Allocated memory is still 314.6MB. Free memory was 137.7MB in the beginning and 134.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 57 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 191.3s, OverallIterations: 59, TraceHistogramMax: 14, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.1s, AutomataDifference: 55.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 22791 SdHoareTripleChecker+Valid, 18.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 22791 mSDsluCounter, 61227 SdHoareTripleChecker+Invalid, 15.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 9217 IncrementalHoareTripleChecker+Unchecked, 57900 mSDsCounter, 2802 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 49534 IncrementalHoareTripleChecker+Invalid, 61553 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2802 mSolverCounterUnsat, 3327 mSDtfsCounter, 49534 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12248 GetRequests, 9240 SyntacticMatches, 148 SemanticMatches, 2860 ConstructedPredicates, 2 IntricatePredicates, 52 DeprecatedPredicates, 51348 ImplicationChecksByTransitivity, 86.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=247occurred in iteration=58, InterpolantAutomatonStates: 1642, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 59 MinimizatonAttempts, 786 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 14.3s SatisfiabilityAnalysisTime, 107.7s InterpolantComputationTime, 10622 NumberOfCodeBlocks, 10622 NumberOfCodeBlocksAsserted, 248 NumberOfCheckSat, 15646 ConstructedInterpolants, 1774 QuantifiedInterpolants, 183132 SizeOfPredicates, 565 NumberOfNonLiveVariables, 20744 ConjunctsInSsa, 2105 ConjunctsInUnsatCore, 139 InterpolantComputations, 19 PerfectInterpolantSequences, 21963/55539 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-18 19:38:51,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE