./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 13:57:07,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 13:57:07,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 13:57:07,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 13:57:07,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 13:57:07,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 13:57:07,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 13:57:07,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 13:57:07,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 13:57:07,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 13:57:07,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 13:57:07,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 13:57:07,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 13:57:07,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 13:57:07,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 13:57:07,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 13:57:07,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 13:57:07,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 13:57:07,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 13:57:07,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 13:57:07,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 13:57:07,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 13:57:07,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 13:57:07,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 13:57:07,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 13:57:07,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 13:57:07,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 13:57:07,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 13:57:07,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 13:57:07,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 13:57:08,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 13:57:08,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 13:57:08,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 13:57:08,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 13:57:08,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 13:57:08,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 13:57:08,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 13:57:08,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 13:57:08,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 13:57:08,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 13:57:08,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 13:57:08,008 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-15 13:57:08,027 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 13:57:08,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 13:57:08,029 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 13:57:08,029 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 13:57:08,029 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 13:57:08,030 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 13:57:08,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 13:57:08,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 13:57:08,031 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 13:57:08,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 13:57:08,032 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 13:57:08,032 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 13:57:08,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 13:57:08,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 13:57:08,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 13:57:08,032 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 13:57:08,032 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 13:57:08,033 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 13:57:08,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 13:57:08,033 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 13:57:08,033 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 13:57:08,033 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 13:57:08,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 13:57:08,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 13:57:08,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 13:57:08,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:57:08,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 13:57:08,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 13:57:08,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 13:57:08,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 13:57:08,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 13:57:08,036 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8688e0efa9d37c2205606fbd307da42d83b0f0e2936dd15336b8b67e136d86b0 [2021-12-15 13:57:08,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 13:57:08,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 13:57:08,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 13:57:08,238 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 13:57:08,239 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 13:57:08,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2021-12-15 13:57:08,287 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83abd12a7/edeb9bf2ed1c437c8db4a33abd76044e/FLAGa4d983288 [2021-12-15 13:57:08,688 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 13:57:08,689 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2021-12-15 13:57:08,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83abd12a7/edeb9bf2ed1c437c8db4a33abd76044e/FLAGa4d983288 [2021-12-15 13:57:08,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83abd12a7/edeb9bf2ed1c437c8db4a33abd76044e [2021-12-15 13:57:08,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 13:57:08,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 13:57:08,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 13:57:08,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 13:57:08,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 13:57:08,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:57:08" (1/1) ... [2021-12-15 13:57:08,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@313a4bd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:08, skipping insertion in model container [2021-12-15 13:57:08,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:57:08" (1/1) ... [2021-12-15 13:57:08,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 13:57:08,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 13:57:08,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:57:08,978 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 13:57:09,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:57:09,045 INFO L208 MainTranslator]: Completed translation [2021-12-15 13:57:09,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:09 WrapperNode [2021-12-15 13:57:09,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 13:57:09,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 13:57:09,047 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 13:57:09,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 13:57:09,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:09" (1/1) ... [2021-12-15 13:57:09,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:09" (1/1) ... [2021-12-15 13:57:09,088 INFO L137 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2021-12-15 13:57:09,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 13:57:09,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 13:57:09,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 13:57:09,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 13:57:09,095 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:09" (1/1) ... [2021-12-15 13:57:09,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:09" (1/1) ... [2021-12-15 13:57:09,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:09" (1/1) ... [2021-12-15 13:57:09,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:09" (1/1) ... [2021-12-15 13:57:09,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:09" (1/1) ... [2021-12-15 13:57:09,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:09" (1/1) ... [2021-12-15 13:57:09,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:09" (1/1) ... [2021-12-15 13:57:09,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 13:57:09,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 13:57:09,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 13:57:09,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 13:57:09,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:09" (1/1) ... [2021-12-15 13:57:09,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:57:09,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:09,160 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 13:57:09,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 13:57:09,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 13:57:09,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 13:57:09,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 13:57:09,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 13:57:09,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 13:57:09,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 13:57:09,297 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 13:57:09,302 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 13:57:09,470 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 13:57:09,475 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 13:57:09,475 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-15 13:57:09,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:57:09 BoogieIcfgContainer [2021-12-15 13:57:09,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 13:57:09,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 13:57:09,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 13:57:09,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 13:57:09,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 01:57:08" (1/3) ... [2021-12-15 13:57:09,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dbec805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:57:09, skipping insertion in model container [2021-12-15 13:57:09,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:57:09" (2/3) ... [2021-12-15 13:57:09,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dbec805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:57:09, skipping insertion in model container [2021-12-15 13:57:09,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:57:09" (3/3) ... [2021-12-15 13:57:09,483 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcat-alloca-2.i [2021-12-15 13:57:09,490 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 13:57:09,490 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-12-15 13:57:09,523 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 13:57:09,527 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 13:57:09,527 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-12-15 13:57:09,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 44 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) [2021-12-15 13:57:09,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 13:57:09,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:09,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:09,541 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:09,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031099, now seen corresponding path program 1 times [2021-12-15 13:57:09,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:09,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868475978] [2021-12-15 13:57:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:09,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:09,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:09,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868475978] [2021-12-15 13:57:09,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868475978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:09,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:09,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 13:57:09,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825048826] [2021-12-15 13:57:09,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:09,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:57:09,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:09,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:57:09,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:09,745 INFO L87 Difference]: Start difference. First operand has 45 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 44 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) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:09,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:09,866 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2021-12-15 13:57:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:57:09,869 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-15 13:57:09,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:09,877 INFO L225 Difference]: With dead ends: 127 [2021-12-15 13:57:09,877 INFO L226 Difference]: Without dead ends: 121 [2021-12-15 13:57:09,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:57:09,882 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 217 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:09,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 164 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:09,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-15 13:57:09,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 46. [2021-12-15 13:57:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-15 13:57:09,909 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 7 [2021-12-15 13:57:09,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:09,909 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-15 13:57:09,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-15 13:57:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 13:57:09,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:09,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:09,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 13:57:09,910 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:09,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:09,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033021, now seen corresponding path program 1 times [2021-12-15 13:57:09,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:09,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070367878] [2021-12-15 13:57:09,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:09,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:09,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:09,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070367878] [2021-12-15 13:57:09,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070367878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:09,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:09,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:57:09,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433907909] [2021-12-15 13:57:09,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:09,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:57:09,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:09,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:57:09,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:57:09,945 INFO L87 Difference]: Start difference. First operand 46 states and 55 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) [2021-12-15 13:57:09,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:09,970 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-12-15 13:57:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:57:09,971 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 [2021-12-15 13:57:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:09,974 INFO L225 Difference]: With dead ends: 47 [2021-12-15 13:57:09,974 INFO L226 Difference]: Without dead ends: 46 [2021-12-15 13:57:09,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:57:09,979 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:09,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 73 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:09,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-15 13:57:09,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-12-15 13:57:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.75) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-12-15 13:57:09,995 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2021-12-15 13:57:09,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:09,995 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-12-15 13:57:09,995 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) [2021-12-15 13:57:09,996 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-12-15 13:57:09,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 13:57:09,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:09,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:09,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 13:57:09,997 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:09,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:10,000 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2021-12-15 13:57:10,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:10,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815984361] [2021-12-15 13:57:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:10,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:10,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815984361] [2021-12-15 13:57:10,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815984361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:10,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:10,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:57:10,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634590793] [2021-12-15 13:57:10,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:10,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:10,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:10,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:10,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:10,061 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:10,089 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-12-15 13:57:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:10,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 13:57:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:10,092 INFO L225 Difference]: With dead ends: 78 [2021-12-15 13:57:10,092 INFO L226 Difference]: Without dead ends: 78 [2021-12-15 13:57:10,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:10,094 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 37 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 124 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 [2021-12-15 13:57:10,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:10,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-15 13:57:10,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-12-15 13:57:10,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.71875) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-15 13:57:10,101 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2021-12-15 13:57:10,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:10,102 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-15 13:57:10,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-15 13:57:10,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 13:57:10,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:10,102 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:10,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 13:57:10,103 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:10,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:10,104 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2021-12-15 13:57:10,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:10,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049825785] [2021-12-15 13:57:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:10,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:10,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049825785] [2021-12-15 13:57:10,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049825785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:10,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:10,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 13:57:10,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576531354] [2021-12-15 13:57:10,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:10,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:57:10,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:10,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:57:10,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:10,160 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:10,209 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2021-12-15 13:57:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:57:10,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 13:57:10,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:10,211 INFO L225 Difference]: With dead ends: 84 [2021-12-15 13:57:10,211 INFO L226 Difference]: Without dead ends: 84 [2021-12-15 13:57:10,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:57:10,219 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 106 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:10,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 163 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-15 13:57:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 47. [2021-12-15 13:57:10,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.71875) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-15 13:57:10,224 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2021-12-15 13:57:10,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:10,224 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-15 13:57:10,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,224 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-15 13:57:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 13:57:10,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:10,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:10,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 13:57:10,225 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:10,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:10,225 INFO L85 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2021-12-15 13:57:10,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:10,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182525803] [2021-12-15 13:57:10,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:10,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:10,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182525803] [2021-12-15 13:57:10,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182525803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:10,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:10,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:57:10,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029457308] [2021-12-15 13:57:10,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:10,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:57:10,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:10,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:57:10,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:57:10,281 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:10,304 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-12-15 13:57:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:57:10,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 13:57:10,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:10,304 INFO L225 Difference]: With dead ends: 45 [2021-12-15 13:57:10,305 INFO L226 Difference]: Without dead ends: 45 [2021-12-15 13:57:10,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:57:10,305 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:10,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 37 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:10,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-15 13:57:10,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-15 13:57:10,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.65625) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-12-15 13:57:10,308 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 8 [2021-12-15 13:57:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:10,308 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-12-15 13:57:10,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-12-15 13:57:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 13:57:10,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:10,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:10,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 13:57:10,310 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:10,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:10,310 INFO L85 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2021-12-15 13:57:10,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:10,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619124535] [2021-12-15 13:57:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:10,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:10,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619124535] [2021-12-15 13:57:10,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619124535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:10,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:10,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:57:10,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401013547] [2021-12-15 13:57:10,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:10,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:10,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:10,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:10,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:10,359 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:10,413 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2021-12-15 13:57:10,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:10,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 13:57:10,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:10,414 INFO L225 Difference]: With dead ends: 79 [2021-12-15 13:57:10,415 INFO L226 Difference]: Without dead ends: 79 [2021-12-15 13:57:10,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:10,416 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 38 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:10,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 82 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-15 13:57:10,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2021-12-15 13:57:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 46 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) [2021-12-15 13:57:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-12-15 13:57:10,432 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 8 [2021-12-15 13:57:10,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:10,433 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-12-15 13:57:10,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,433 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-12-15 13:57:10,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 13:57:10,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:10,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:10,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 13:57:10,434 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:10,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:10,435 INFO L85 PathProgramCache]: Analyzing trace with hash 690580011, now seen corresponding path program 1 times [2021-12-15 13:57:10,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:10,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918251044] [2021-12-15 13:57:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:10,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:10,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918251044] [2021-12-15 13:57:10,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918251044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:10,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:10,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:57:10,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712113042] [2021-12-15 13:57:10,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:10,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:10,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:10,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:10,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:10,500 INFO L87 Difference]: Start difference. First operand 47 states and 56 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) [2021-12-15 13:57:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:10,520 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-12-15 13:57:10,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:10,521 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 [2021-12-15 13:57:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:10,521 INFO L225 Difference]: With dead ends: 46 [2021-12-15 13:57:10,522 INFO L226 Difference]: Without dead ends: 46 [2021-12-15 13:57:10,522 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 [2021-12-15 13:57:10,523 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:10,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-15 13:57:10,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-15 13:57:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-15 13:57:10,527 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2021-12-15 13:57:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:10,527 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-15 13:57:10,527 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) [2021-12-15 13:57:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-15 13:57:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 13:57:10,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:10,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:10,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 13:57:10,529 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:10,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:10,529 INFO L85 PathProgramCache]: Analyzing trace with hash 690580063, now seen corresponding path program 1 times [2021-12-15 13:57:10,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:10,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574879800] [2021-12-15 13:57:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:10,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:10,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574879800] [2021-12-15 13:57:10,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574879800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:10,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:10,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:57:10,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59281025] [2021-12-15 13:57:10,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:10,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:10,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:10,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:10,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:10,585 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 4 states, 4 states have (on average 2.5) 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) [2021-12-15 13:57:10,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:10,595 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2021-12-15 13:57:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:10,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) 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 [2021-12-15 13:57:10,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:10,596 INFO L225 Difference]: With dead ends: 80 [2021-12-15 13:57:10,596 INFO L226 Difference]: Without dead ends: 80 [2021-12-15 13:57:10,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:10,597 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:10,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 86 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:10,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-15 13:57:10,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2021-12-15 13:57:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.5333333333333334) 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) [2021-12-15 13:57:10,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-12-15 13:57:10,607 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 10 [2021-12-15 13:57:10,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:10,608 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-12-15 13:57:10,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) 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) [2021-12-15 13:57:10,608 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-12-15 13:57:10,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 13:57:10,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:10,608 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:10,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 13:57:10,609 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:10,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:10,609 INFO L85 PathProgramCache]: Analyzing trace with hash 747838365, now seen corresponding path program 1 times [2021-12-15 13:57:10,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:10,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999443968] [2021-12-15 13:57:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:10,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:10,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999443968] [2021-12-15 13:57:10,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999443968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:10,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:10,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:57:10,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215840173] [2021-12-15 13:57:10,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:10,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:57:10,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:10,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:57:10,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:57:10,627 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2021-12-15 13:57:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:10,643 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-12-15 13:57:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:57:10,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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 [2021-12-15 13:57:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:10,644 INFO L225 Difference]: With dead ends: 55 [2021-12-15 13:57:10,644 INFO L226 Difference]: Without dead ends: 55 [2021-12-15 13:57:10,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:57:10,645 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:10,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:10,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-15 13:57:10,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-12-15 13:57:10,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.488888888888889) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-12-15 13:57:10,647 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 10 [2021-12-15 13:57:10,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:10,647 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-12-15 13:57:10,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 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) [2021-12-15 13:57:10,647 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-12-15 13:57:10,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 13:57:10,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:10,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:10,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 13:57:10,648 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:10,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:10,649 INFO L85 PathProgramCache]: Analyzing trace with hash 747838366, now seen corresponding path program 1 times [2021-12-15 13:57:10,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:10,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825539217] [2021-12-15 13:57:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:10,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:10,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825539217] [2021-12-15 13:57:10,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825539217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:10,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:10,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 13:57:10,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752137228] [2021-12-15 13:57:10,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:10,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 13:57:10,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:10,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 13:57:10,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 13:57:10,685 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-12-15 13:57:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:10,736 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2021-12-15 13:57:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 13:57:10,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 [2021-12-15 13:57:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:10,738 INFO L225 Difference]: With dead ends: 107 [2021-12-15 13:57:10,738 INFO L226 Difference]: Without dead ends: 107 [2021-12-15 13:57:10,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-15 13:57:10,739 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 228 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:10,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 107 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:10,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-15 13:57:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 56. [2021-12-15 13:57:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.5) internal successors, (69), 55 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) [2021-12-15 13:57:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2021-12-15 13:57:10,741 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 10 [2021-12-15 13:57:10,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:10,742 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2021-12-15 13:57:10,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2021-12-15 13:57:10,742 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2021-12-15 13:57:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 13:57:10,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:10,743 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:10,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 13:57:10,743 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:10,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:10,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1772121568, now seen corresponding path program 1 times [2021-12-15 13:57:10,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:10,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273274978] [2021-12-15 13:57:10,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:10,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:10,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273274978] [2021-12-15 13:57:10,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273274978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:10,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:10,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 13:57:10,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728698503] [2021-12-15 13:57:10,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:10,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 13:57:10,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:10,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 13:57:10,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 13:57:10,815 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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) [2021-12-15 13:57:10,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:10,896 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2021-12-15 13:57:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 13:57:10,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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 [2021-12-15 13:57:10,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:10,897 INFO L225 Difference]: With dead ends: 81 [2021-12-15 13:57:10,897 INFO L226 Difference]: Without dead ends: 81 [2021-12-15 13:57:10,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:57:10,898 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 152 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:10,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 67 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:10,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-15 13:57:10,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2021-12-15 13:57:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.5) internal successors, (72), 57 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) [2021-12-15 13:57:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2021-12-15 13:57:10,900 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 10 [2021-12-15 13:57:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:10,900 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2021-12-15 13:57:10,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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) [2021-12-15 13:57:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2021-12-15 13:57:10,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 13:57:10,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:10,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:10,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 13:57:10,902 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:10,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:10,902 INFO L85 PathProgramCache]: Analyzing trace with hash -66856135, now seen corresponding path program 1 times [2021-12-15 13:57:10,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:10,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310255387] [2021-12-15 13:57:10,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:10,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:10,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310255387] [2021-12-15 13:57:10,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310255387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:10,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:10,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:57:10,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694482296] [2021-12-15 13:57:10,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:10,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:57:10,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:10,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:57:10,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:10,951 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:10,992 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2021-12-15 13:57:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:57:10,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 13:57:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:10,994 INFO L225 Difference]: With dead ends: 83 [2021-12-15 13:57:10,994 INFO L226 Difference]: Without dead ends: 83 [2021-12-15 13:57:10,994 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 [2021-12-15 13:57:10,994 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 123 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:10,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 89 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-15 13:57:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-12-15 13:57:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2021-12-15 13:57:10,997 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 11 [2021-12-15 13:57:10,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:10,997 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2021-12-15 13:57:10,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2021-12-15 13:57:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 13:57:10,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:10,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:10,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 13:57:10,998 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:10,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:10,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1708151227, now seen corresponding path program 1 times [2021-12-15 13:57:10,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:10,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936068033] [2021-12-15 13:57:10,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:10,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:11,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:11,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936068033] [2021-12-15 13:57:11,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936068033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:11,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:11,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:57:11,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264643895] [2021-12-15 13:57:11,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:11,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:57:11,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:11,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:57:11,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:11,048 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:11,074 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2021-12-15 13:57:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:57:11,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 13:57:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:11,075 INFO L225 Difference]: With dead ends: 63 [2021-12-15 13:57:11,075 INFO L226 Difference]: Without dead ends: 63 [2021-12-15 13:57:11,075 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 [2021-12-15 13:57:11,076 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:11,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 33 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-15 13:57:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-12-15 13:57:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 56 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:11,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-12-15 13:57:11,078 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 11 [2021-12-15 13:57:11,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:11,078 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-12-15 13:57:11,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:11,078 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-12-15 13:57:11,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-15 13:57:11,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:11,079 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:11,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 13:57:11,079 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:11,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1736941833, now seen corresponding path program 1 times [2021-12-15 13:57:11,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:11,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834474372] [2021-12-15 13:57:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:11,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:11,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:11,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834474372] [2021-12-15 13:57:11,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834474372] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:11,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264318269] [2021-12-15 13:57:11,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:11,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:11,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:11,172 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:11,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 13:57:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:11,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 13:57:11,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:11,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:11,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:57:11,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:57:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:11,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:11,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264318269] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:11,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:11,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-15 13:57:11,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980950563] [2021-12-15 13:57:11,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:11,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 13:57:11,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:11,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 13:57:11,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:57:11,635 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:11,762 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2021-12-15 13:57:11,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 13:57:11,762 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-15 13:57:11,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:11,763 INFO L225 Difference]: With dead ends: 122 [2021-12-15 13:57:11,763 INFO L226 Difference]: Without dead ends: 122 [2021-12-15 13:57:11,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-15 13:57:11,764 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 266 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:11,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 184 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:11,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-15 13:57:11,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 52. [2021-12-15 13:57:11,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-12-15 13:57:11,767 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 12 [2021-12-15 13:57:11,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:11,767 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-12-15 13:57:11,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:11,767 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-12-15 13:57:11,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 13:57:11,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:11,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:11,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:11,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 13:57:11,984 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:11,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:11,984 INFO L85 PathProgramCache]: Analyzing trace with hash 175763932, now seen corresponding path program 1 times [2021-12-15 13:57:11,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:11,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960734491] [2021-12-15 13:57:11,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:11,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:12,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:12,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960734491] [2021-12-15 13:57:12,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960734491] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:12,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:12,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:57:12,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220104121] [2021-12-15 13:57:12,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:12,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:12,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:12,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:12,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:12,013 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:12,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:12,036 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-12-15 13:57:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:12,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 13:57:12,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:12,038 INFO L225 Difference]: With dead ends: 51 [2021-12-15 13:57:12,038 INFO L226 Difference]: Without dead ends: 51 [2021-12-15 13:57:12,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:12,038 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 40 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:12,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 47 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:12,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-15 13:57:12,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-15 13:57:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 50 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) [2021-12-15 13:57:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-12-15 13:57:12,040 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 13 [2021-12-15 13:57:12,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:12,040 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-12-15 13:57:12,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:12,040 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-12-15 13:57:12,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 13:57:12,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:12,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:12,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 13:57:12,041 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:12,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:12,041 INFO L85 PathProgramCache]: Analyzing trace with hash 175763933, now seen corresponding path program 1 times [2021-12-15 13:57:12,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:12,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68067460] [2021-12-15 13:57:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:12,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:12,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:12,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68067460] [2021-12-15 13:57:12,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68067460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:12,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:12,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 13:57:12,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504195860] [2021-12-15 13:57:12,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:12,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 13:57:12,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:12,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 13:57:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 13:57:12,083 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:12,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:12,118 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-12-15 13:57:12,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:57:12,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 13:57:12,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:12,119 INFO L225 Difference]: With dead ends: 55 [2021-12-15 13:57:12,119 INFO L226 Difference]: Without dead ends: 55 [2021-12-15 13:57:12,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 13:57:12,120 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:12,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 65 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-15 13:57:12,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-12-15 13:57:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.4) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-12-15 13:57:12,131 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 13 [2021-12-15 13:57:12,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:12,132 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-12-15 13:57:12,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:12,132 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-12-15 13:57:12,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-15 13:57:12,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:12,134 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:12,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 13:57:12,134 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:12,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:12,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1510420451, now seen corresponding path program 1 times [2021-12-15 13:57:12,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:12,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211230855] [2021-12-15 13:57:12,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:12,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:12,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:12,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211230855] [2021-12-15 13:57:12,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211230855] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:12,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066447652] [2021-12-15 13:57:12,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:12,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:12,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:12,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:12,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 13:57:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 13:57:12,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:12,266 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:12,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:12,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:12,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066447652] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:12,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:12,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-12-15 13:57:12,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647898085] [2021-12-15 13:57:12,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:12,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 13:57:12,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:12,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 13:57:12,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-12-15 13:57:12,453 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:12,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:12,606 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2021-12-15 13:57:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:57:12,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-15 13:57:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:12,607 INFO L225 Difference]: With dead ends: 95 [2021-12-15 13:57:12,607 INFO L226 Difference]: Without dead ends: 95 [2021-12-15 13:57:12,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-12-15 13:57:12,608 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 156 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:12,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 164 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:12,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-15 13:57:12,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 49. [2021-12-15 13:57:12,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.372093023255814) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:12,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-12-15 13:57:12,611 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 14 [2021-12-15 13:57:12,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:12,611 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-12-15 13:57:12,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:12,611 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-12-15 13:57:12,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 13:57:12,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:12,612 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:12,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:12,827 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,SelfDestructingSolverStorable16 [2021-12-15 13:57:12,827 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:12,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:12,828 INFO L85 PathProgramCache]: Analyzing trace with hash 618210419, now seen corresponding path program 1 times [2021-12-15 13:57:12,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:12,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004651589] [2021-12-15 13:57:12,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:12,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:12,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:12,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004651589] [2021-12-15 13:57:12,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004651589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:12,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:12,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 13:57:12,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36103500] [2021-12-15 13:57:12,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:12,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 13:57:12,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:12,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 13:57:12,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:12,852 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2021-12-15 13:57:12,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:12,879 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-12-15 13:57:12,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 13:57:12,880 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 [2021-12-15 13:57:12,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:12,880 INFO L225 Difference]: With dead ends: 48 [2021-12-15 13:57:12,880 INFO L226 Difference]: Without dead ends: 48 [2021-12-15 13:57:12,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:57:12,881 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:12,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 68 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-15 13:57:12,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-12-15 13:57:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 47 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) [2021-12-15 13:57:12,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-12-15 13:57:12,882 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 16 [2021-12-15 13:57:12,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:12,883 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-12-15 13:57:12,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2021-12-15 13:57:12,883 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-12-15 13:57:12,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 13:57:12,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:12,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:12,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 13:57:12,884 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:12,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash 618210420, now seen corresponding path program 1 times [2021-12-15 13:57:12,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:12,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408097608] [2021-12-15 13:57:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:12,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:12,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:12,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408097608] [2021-12-15 13:57:12,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408097608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:12,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:12,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 13:57:12,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698222778] [2021-12-15 13:57:12,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:12,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 13:57:12,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 13:57:12,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:57:12,933 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-12-15 13:57:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:12,974 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-12-15 13:57:12,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 13:57:12,975 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-12-15 13:57:12,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:12,975 INFO L225 Difference]: With dead ends: 54 [2021-12-15 13:57:12,975 INFO L226 Difference]: Without dead ends: 54 [2021-12-15 13:57:12,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:57:12,976 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:12,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 80 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:12,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-15 13:57:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-12-15 13:57:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:12,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-12-15 13:57:12,978 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 16 [2021-12-15 13:57:12,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:12,978 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-12-15 13:57:12,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-12-15 13:57:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-12-15 13:57:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 13:57:12,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:12,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:12,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 13:57:12,979 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:12,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:12,979 INFO L85 PathProgramCache]: Analyzing trace with hash 618212108, now seen corresponding path program 1 times [2021-12-15 13:57:12,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:12,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793904885] [2021-12-15 13:57:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:12,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:13,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:13,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793904885] [2021-12-15 13:57:13,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793904885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:13,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521263689] [2021-12-15 13:57:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:13,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:13,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:13,018 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:13,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 13:57:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:13,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-15 13:57:13,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:13,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 13:57:13,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:57:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:13,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:57:13,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521263689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:13,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 13:57:13,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2021-12-15 13:57:13,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132118189] [2021-12-15 13:57:13,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:13,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 13:57:13,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:13,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 13:57:13,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-15 13:57:13,132 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-12-15 13:57:13,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:13,190 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2021-12-15 13:57:13,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 13:57:13,190 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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 [2021-12-15 13:57:13,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:13,191 INFO L225 Difference]: With dead ends: 75 [2021-12-15 13:57:13,191 INFO L226 Difference]: Without dead ends: 75 [2021-12-15 13:57:13,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-15 13:57:13,192 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:13,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 178 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:13,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-15 13:57:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2021-12-15 13:57:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 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) [2021-12-15 13:57:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-12-15 13:57:13,193 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 16 [2021-12-15 13:57:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:13,194 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-12-15 13:57:13,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 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) [2021-12-15 13:57:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-12-15 13:57:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-15 13:57:13,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:13,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:13,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:13,413 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 [2021-12-15 13:57:13,413 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:13,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:13,414 INFO L85 PathProgramCache]: Analyzing trace with hash 876377546, now seen corresponding path program 1 times [2021-12-15 13:57:13,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:13,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769501460] [2021-12-15 13:57:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:13,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:13,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:13,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769501460] [2021-12-15 13:57:13,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769501460] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:13,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52895567] [2021-12-15 13:57:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:13,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:13,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:13,448 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:13,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 13:57:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:13,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-15 13:57:13,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:13,519 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:13,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:13,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:13,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52895567] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:13,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:13,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2021-12-15 13:57:13,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227494748] [2021-12-15 13:57:13,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:13,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 13:57:13,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:13,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 13:57:13,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-15 13:57:13,668 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:13,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:13,743 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-12-15 13:57:13,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 13:57:13,744 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-15 13:57:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:13,744 INFO L225 Difference]: With dead ends: 76 [2021-12-15 13:57:13,744 INFO L226 Difference]: Without dead ends: 76 [2021-12-15 13:57:13,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-15 13:57:13,745 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:13,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 121 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:13,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-15 13:57:13,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2021-12-15 13:57:13,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.280701754385965) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:13,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-12-15 13:57:13,747 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 16 [2021-12-15 13:57:13,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:13,747 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-12-15 13:57:13,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:13,748 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-12-15 13:57:13,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 13:57:13,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:13,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:13,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 13:57:13,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:13,964 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:13,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:13,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1984653866, now seen corresponding path program 1 times [2021-12-15 13:57:13,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:13,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322128805] [2021-12-15 13:57:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:13,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:13,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:13,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322128805] [2021-12-15 13:57:13,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322128805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:13,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:13,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:57:13,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451078621] [2021-12-15 13:57:13,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:13,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:13,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:13,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:13,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:13,989 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:14,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:14,010 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-12-15 13:57:14,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:14,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-15 13:57:14,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:14,013 INFO L225 Difference]: With dead ends: 61 [2021-12-15 13:57:14,013 INFO L226 Difference]: Without dead ends: 61 [2021-12-15 13:57:14,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 13:57:14,014 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:14,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 64 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:14,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-15 13:57:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-15 13:57:14,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.263157894736842) internal successors, (72), 60 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) [2021-12-15 13:57:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-12-15 13:57:14,016 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 17 [2021-12-15 13:57:14,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:14,016 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-12-15 13:57:14,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-12-15 13:57:14,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 13:57:14,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:14,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:14,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 13:57:14,017 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:14,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1984653867, now seen corresponding path program 1 times [2021-12-15 13:57:14,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:14,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575981288] [2021-12-15 13:57:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:14,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:14,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:14,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575981288] [2021-12-15 13:57:14,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575981288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:14,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:14,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 13:57:14,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164279585] [2021-12-15 13:57:14,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:14,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 13:57:14,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:14,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 13:57:14,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 13:57:14,094 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:14,139 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-12-15 13:57:14,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 13:57:14,139 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-15 13:57:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:14,140 INFO L225 Difference]: With dead ends: 65 [2021-12-15 13:57:14,140 INFO L226 Difference]: Without dead ends: 65 [2021-12-15 13:57:14,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:57:14,141 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:14,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 80 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:14,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-15 13:57:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-12-15 13:57:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.25) internal successors, (75), 63 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2021-12-15 13:57:14,143 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 17 [2021-12-15 13:57:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:14,145 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2021-12-15 13:57:14,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:14,145 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2021-12-15 13:57:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 13:57:14,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:14,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:14,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 13:57:14,146 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:14,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:14,147 INFO L85 PathProgramCache]: Analyzing trace with hash -942701569, now seen corresponding path program 2 times [2021-12-15 13:57:14,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:14,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242780149] [2021-12-15 13:57:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:14,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:14,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:14,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242780149] [2021-12-15 13:57:14,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242780149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:14,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:14,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-15 13:57:14,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129382144] [2021-12-15 13:57:14,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:14,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 13:57:14,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:14,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 13:57:14,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:57:14,245 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:14,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:14,355 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2021-12-15 13:57:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 13:57:14,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-15 13:57:14,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:14,356 INFO L225 Difference]: With dead ends: 91 [2021-12-15 13:57:14,357 INFO L226 Difference]: Without dead ends: 91 [2021-12-15 13:57:14,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-15 13:57:14,357 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 109 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:14,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 160 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:14,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-15 13:57:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2021-12-15 13:57:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-12-15 13:57:14,360 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 19 [2021-12-15 13:57:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:14,360 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-12-15 13:57:14,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-12-15 13:57:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 13:57:14,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:14,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:14,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-15 13:57:14,362 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:14,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:14,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1963769923, now seen corresponding path program 1 times [2021-12-15 13:57:14,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:14,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731619163] [2021-12-15 13:57:14,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:14,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:14,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:14,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731619163] [2021-12-15 13:57:14,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731619163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:14,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:14,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-15 13:57:14,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164231292] [2021-12-15 13:57:14,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:14,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 13:57:14,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:14,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 13:57:14,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:57:14,464 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:14,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:14,542 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2021-12-15 13:57:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 13:57:14,542 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-15 13:57:14,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:14,543 INFO L225 Difference]: With dead ends: 82 [2021-12-15 13:57:14,543 INFO L226 Difference]: Without dead ends: 82 [2021-12-15 13:57:14,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-12-15 13:57:14,543 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 114 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:14,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 149 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:14,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-15 13:57:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 61. [2021-12-15 13:57:14,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.280701754385965) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-12-15 13:57:14,545 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 19 [2021-12-15 13:57:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:14,545 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-12-15 13:57:14,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-12-15 13:57:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 13:57:14,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:14,545 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:14,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-15 13:57:14,545 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:14,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:14,546 INFO L85 PathProgramCache]: Analyzing trace with hash 303592444, now seen corresponding path program 1 times [2021-12-15 13:57:14,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:14,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856128059] [2021-12-15 13:57:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:14,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:14,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:14,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856128059] [2021-12-15 13:57:14,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856128059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:14,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:14,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-15 13:57:14,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726675644] [2021-12-15 13:57:14,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:14,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 13:57:14,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:14,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 13:57:14,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-15 13:57:14,686 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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) [2021-12-15 13:57:14,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:14,863 INFO L93 Difference]: Finished difference Result 110 states and 126 transitions. [2021-12-15 13:57:14,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 13:57:14,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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 [2021-12-15 13:57:14,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:14,864 INFO L225 Difference]: With dead ends: 110 [2021-12-15 13:57:14,864 INFO L226 Difference]: Without dead ends: 110 [2021-12-15 13:57:14,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-12-15 13:57:14,865 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:14,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 249 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:14,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-15 13:57:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 86. [2021-12-15 13:57:14,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 85 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2021-12-15 13:57:14,867 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 20 [2021-12-15 13:57:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:14,867 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2021-12-15 13:57:14,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 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) [2021-12-15 13:57:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2021-12-15 13:57:14,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 13:57:14,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:14,868 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:14,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-15 13:57:14,868 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:14,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1690552262, now seen corresponding path program 1 times [2021-12-15 13:57:14,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:14,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057156734] [2021-12-15 13:57:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:14,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:15,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:15,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057156734] [2021-12-15 13:57:15,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057156734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:15,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:15,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-15 13:57:15,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609838971] [2021-12-15 13:57:15,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:15,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-15 13:57:15,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:15,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-15 13:57:15,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-15 13:57:15,045 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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) [2021-12-15 13:57:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:15,306 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2021-12-15 13:57:15,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 13:57:15,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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 [2021-12-15 13:57:15,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:15,307 INFO L225 Difference]: With dead ends: 114 [2021-12-15 13:57:15,307 INFO L226 Difference]: Without dead ends: 114 [2021-12-15 13:57:15,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-12-15 13:57:15,308 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 73 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:15,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 221 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-15 13:57:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 83. [2021-12-15 13:57:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.240506329113924) internal successors, (98), 82 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) [2021-12-15 13:57:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2021-12-15 13:57:15,310 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 20 [2021-12-15 13:57:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:15,310 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2021-12-15 13:57:15,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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) [2021-12-15 13:57:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2021-12-15 13:57:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 13:57:15,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:15,310 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:15,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-15 13:57:15,311 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:15,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:15,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1016067132, now seen corresponding path program 1 times [2021-12-15 13:57:15,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:15,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58658114] [2021-12-15 13:57:15,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:15,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:15,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:15,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58658114] [2021-12-15 13:57:15,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58658114] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:15,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:15,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-15 13:57:15,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371494229] [2021-12-15 13:57:15,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:15,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 13:57:15,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:15,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 13:57:15,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-15 13:57:15,442 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-12-15 13:57:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:15,721 INFO L93 Difference]: Finished difference Result 137 states and 157 transitions. [2021-12-15 13:57:15,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 13:57:15,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 [2021-12-15 13:57:15,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:15,727 INFO L225 Difference]: With dead ends: 137 [2021-12-15 13:57:15,727 INFO L226 Difference]: Without dead ends: 137 [2021-12-15 13:57:15,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-12-15 13:57:15,727 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 112 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:15,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 174 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:15,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-15 13:57:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2021-12-15 13:57:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 81 states have (on average 1.2592592592592593) internal successors, (102), 84 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2021-12-15 13:57:15,730 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 20 [2021-12-15 13:57:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:15,730 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2021-12-15 13:57:15,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) [2021-12-15 13:57:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2021-12-15 13:57:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 13:57:15,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:15,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:15,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-15 13:57:15,731 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:15,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:15,731 INFO L85 PathProgramCache]: Analyzing trace with hash 821386545, now seen corresponding path program 1 times [2021-12-15 13:57:15,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:15,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26911588] [2021-12-15 13:57:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:15,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:15,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:15,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26911588] [2021-12-15 13:57:15,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26911588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:15,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:15,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:57:15,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074628307] [2021-12-15 13:57:15,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:15,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:57:15,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:15,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:57:15,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:15,772 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:15,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:15,793 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2021-12-15 13:57:15,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:57:15,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-15 13:57:15,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:15,794 INFO L225 Difference]: With dead ends: 84 [2021-12-15 13:57:15,794 INFO L226 Difference]: Without dead ends: 67 [2021-12-15 13:57:15,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 13:57:15,794 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:15,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 54 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:15,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-15 13:57:15,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-15 13:57:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.203125) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-12-15 13:57:15,796 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 21 [2021-12-15 13:57:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:15,797 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-12-15 13:57:15,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-12-15 13:57:15,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 13:57:15,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:15,797 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] [2021-12-15 13:57:15,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-15 13:57:15,798 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:15,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:15,798 INFO L85 PathProgramCache]: Analyzing trace with hash 293432666, now seen corresponding path program 1 times [2021-12-15 13:57:15,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:15,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894027623] [2021-12-15 13:57:15,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:15,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:15,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:15,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894027623] [2021-12-15 13:57:15,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894027623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:15,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380732648] [2021-12-15 13:57:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:15,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:15,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:15,890 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:15,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 13:57:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:15,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 13:57:15,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:16,004 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:16,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:16,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:16,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380732648] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:16,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:16,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-15 13:57:16,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463073141] [2021-12-15 13:57:16,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:16,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 13:57:16,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:16,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 13:57:16,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-12-15 13:57:16,263 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 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) [2021-12-15 13:57:16,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:16,552 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2021-12-15 13:57:16,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 13:57:16,553 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-15 13:57:16,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:16,553 INFO L225 Difference]: With dead ends: 98 [2021-12-15 13:57:16,553 INFO L226 Difference]: Without dead ends: 98 [2021-12-15 13:57:16,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 13:57:16,554 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 319 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:16,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 150 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:16,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-15 13:57:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2021-12-15 13:57:16,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 67 states have (on average 1.208955223880597) internal successors, (81), 69 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2021-12-15 13:57:16,557 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 23 [2021-12-15 13:57:16,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:16,557 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2021-12-15 13:57:16,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 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) [2021-12-15 13:57:16,557 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2021-12-15 13:57:16,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 13:57:16,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:16,558 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:16,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:16,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:16,765 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:16,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:16,765 INFO L85 PathProgramCache]: Analyzing trace with hash 506425757, now seen corresponding path program 1 times [2021-12-15 13:57:16,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:16,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643187055] [2021-12-15 13:57:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:16,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:16,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:16,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643187055] [2021-12-15 13:57:16,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643187055] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:16,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126379536] [2021-12-15 13:57:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:16,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:16,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:16,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:16,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 13:57:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:16,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 13:57:16,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:16,948 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:16,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:17,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:17,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126379536] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:17,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:17,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2021-12-15 13:57:17,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709560264] [2021-12-15 13:57:17,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:17,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-15 13:57:17,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:17,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-15 13:57:17,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-12-15 13:57:17,288 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:17,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:17,780 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2021-12-15 13:57:17,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 13:57:17,780 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-15 13:57:17,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:17,781 INFO L225 Difference]: With dead ends: 102 [2021-12-15 13:57:17,781 INFO L226 Difference]: Without dead ends: 102 [2021-12-15 13:57:17,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=1212, Unknown=0, NotChecked=0, Total=1560 [2021-12-15 13:57:17,782 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 325 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:17,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 159 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:57:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-15 13:57:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-12-15 13:57:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 79 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2021-12-15 13:57:17,784 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 24 [2021-12-15 13:57:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:17,784 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2021-12-15 13:57:17,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:17,784 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2021-12-15 13:57:17,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 13:57:17,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:17,784 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:17,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:18,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:18,003 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:18,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:18,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1809160449, now seen corresponding path program 1 times [2021-12-15 13:57:18,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:18,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234404255] [2021-12-15 13:57:18,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:18,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:18,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:18,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234404255] [2021-12-15 13:57:18,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234404255] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:18,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923995843] [2021-12-15 13:57:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:18,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:18,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:18,100 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:18,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 13:57:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:18,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-15 13:57:18,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:18,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:18,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:57:18,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:57:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:18,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:18,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923995843] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:18,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:18,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2021-12-15 13:57:18,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188987647] [2021-12-15 13:57:18,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:18,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-15 13:57:18,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:18,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-15 13:57:18,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-15 13:57:18,559 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 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) [2021-12-15 13:57:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:18,905 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2021-12-15 13:57:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 13:57:18,905 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-15 13:57:18,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:18,906 INFO L225 Difference]: With dead ends: 122 [2021-12-15 13:57:18,906 INFO L226 Difference]: Without dead ends: 122 [2021-12-15 13:57:18,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-12-15 13:57:18,907 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 165 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:18,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 310 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:57:18,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-15 13:57:18,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 96. [2021-12-15 13:57:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 95 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:18,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2021-12-15 13:57:18,911 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 24 [2021-12-15 13:57:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:18,911 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2021-12-15 13:57:18,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 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) [2021-12-15 13:57:18,912 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2021-12-15 13:57:18,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-15 13:57:18,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:18,912 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:18,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:19,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:19,120 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:19,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:19,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1394123375, now seen corresponding path program 2 times [2021-12-15 13:57:19,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:19,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352088501] [2021-12-15 13:57:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:19,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:19,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:19,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352088501] [2021-12-15 13:57:19,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352088501] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:19,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511772654] [2021-12-15 13:57:19,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:57:19,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:19,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:19,356 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:19,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 13:57:19,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:57:19,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:19,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-15 13:57:19,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:19,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:19,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:57:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:19,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:19,736 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 [2021-12-15 13:57:19,738 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 [2021-12-15 13:57:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:19,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511772654] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:19,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:19,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2021-12-15 13:57:19,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592942957] [2021-12-15 13:57:19,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:19,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 13:57:19,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:19,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 13:57:19,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-12-15 13:57:19,862 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:20,331 INFO L93 Difference]: Finished difference Result 193 states and 216 transitions. [2021-12-15 13:57:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 13:57:20,331 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-15 13:57:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:20,332 INFO L225 Difference]: With dead ends: 193 [2021-12-15 13:57:20,332 INFO L226 Difference]: Without dead ends: 193 [2021-12-15 13:57:20,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 13:57:20,333 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 165 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:20,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 413 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 478 Invalid, 0 Unknown, 1 Unchecked, 0.2s Time] [2021-12-15 13:57:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-12-15 13:57:20,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 118. [2021-12-15 13:57:20,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 115 states have (on average 1.182608695652174) internal successors, (136), 117 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 136 transitions. [2021-12-15 13:57:20,335 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 136 transitions. Word has length 26 [2021-12-15 13:57:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:20,335 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 136 transitions. [2021-12-15 13:57:20,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 136 transitions. [2021-12-15 13:57:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 13:57:20,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:20,335 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] [2021-12-15 13:57:20,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:20,547 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,SelfDestructingSolverStorable32 [2021-12-15 13:57:20,547 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:20,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1290346678, now seen corresponding path program 1 times [2021-12-15 13:57:20,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:20,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271270591] [2021-12-15 13:57:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:20,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 13:57:20,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:20,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271270591] [2021-12-15 13:57:20,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271270591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:20,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:20,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 13:57:20,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469887977] [2021-12-15 13:57:20,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:20,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 13:57:20,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:20,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 13:57:20,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-15 13:57:20,627 INFO L87 Difference]: Start difference. First operand 118 states and 136 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:20,701 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2021-12-15 13:57:20,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 13:57:20,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-15 13:57:20,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:20,702 INFO L225 Difference]: With dead ends: 158 [2021-12-15 13:57:20,702 INFO L226 Difference]: Without dead ends: 142 [2021-12-15 13:57:20,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-15 13:57:20,703 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:20,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 164 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:57:20,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-15 13:57:20,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-12-15 13:57:20,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 140 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 161 transitions. [2021-12-15 13:57:20,706 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 161 transitions. Word has length 27 [2021-12-15 13:57:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:20,706 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 161 transitions. [2021-12-15 13:57:20,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 161 transitions. [2021-12-15 13:57:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 13:57:20,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:20,707 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] [2021-12-15 13:57:20,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-15 13:57:20,707 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:20,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1149798068, now seen corresponding path program 1 times [2021-12-15 13:57:20,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:20,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946915108] [2021-12-15 13:57:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:20,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 13:57:20,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:20,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946915108] [2021-12-15 13:57:20,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946915108] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:57:20,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:57:20,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-15 13:57:20,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920038492] [2021-12-15 13:57:20,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:57:20,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 13:57:20,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:20,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 13:57:20,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:57:20,839 INFO L87 Difference]: Start difference. First operand 141 states and 161 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:20,929 INFO L93 Difference]: Finished difference Result 156 states and 173 transitions. [2021-12-15 13:57:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 13:57:20,929 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-15 13:57:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:20,930 INFO L225 Difference]: With dead ends: 156 [2021-12-15 13:57:20,930 INFO L226 Difference]: Without dead ends: 140 [2021-12-15 13:57:20,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-15 13:57:20,930 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 62 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:20,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 137 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:57:20,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-15 13:57:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2021-12-15 13:57:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 109 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2021-12-15 13:57:20,933 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 27 [2021-12-15 13:57:20,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:20,933 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2021-12-15 13:57:20,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:20,933 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2021-12-15 13:57:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-15 13:57:20,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:20,934 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:20,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-15 13:57:20,934 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:20,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:20,934 INFO L85 PathProgramCache]: Analyzing trace with hash 446658823, now seen corresponding path program 2 times [2021-12-15 13:57:20,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:20,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864780453] [2021-12-15 13:57:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:20,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:21,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:21,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864780453] [2021-12-15 13:57:21,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864780453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:21,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995239744] [2021-12-15 13:57:21,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:57:21,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:21,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:21,242 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:21,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 13:57:21,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:57:21,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:21,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-15 13:57:21,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:21,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:57:21,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:21,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:57:21,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:57:21,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:57:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:21,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:21,656 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_414 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_414) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-15 13:57:21,676 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_414 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_414) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-15 13:57:21,685 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_414 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_414) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2021-12-15 13:57:21,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:21,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-15 13:57:21,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:21,697 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 37 treesize of output 37 [2021-12-15 13:57:21,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 13:57:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-15 13:57:21,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995239744] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:21,837 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:21,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 28 [2021-12-15 13:57:21,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701573883] [2021-12-15 13:57:21,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:21,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-15 13:57:21,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:21,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-15 13:57:21,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=533, Unknown=3, NotChecked=144, Total=756 [2021-12-15 13:57:21,838 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 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) [2021-12-15 13:57:22,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:22,218 INFO L93 Difference]: Finished difference Result 170 states and 189 transitions. [2021-12-15 13:57:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 13:57:22,218 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-15 13:57:22,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:22,219 INFO L225 Difference]: With dead ends: 170 [2021-12-15 13:57:22,219 INFO L226 Difference]: Without dead ends: 147 [2021-12-15 13:57:22,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=983, Unknown=4, NotChecked=198, Total=1332 [2021-12-15 13:57:22,220 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 85 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:22,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 418 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 207 Invalid, 0 Unknown, 157 Unchecked, 0.1s Time] [2021-12-15 13:57:22,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-15 13:57:22,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 138. [2021-12-15 13:57:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 135 states have (on average 1.1555555555555554) internal successors, (156), 137 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 156 transitions. [2021-12-15 13:57:22,222 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 156 transitions. Word has length 28 [2021-12-15 13:57:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:22,222 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 156 transitions. [2021-12-15 13:57:22,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 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) [2021-12-15 13:57:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 156 transitions. [2021-12-15 13:57:22,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 13:57:22,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:22,222 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:22,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:22,440 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,SelfDestructingSolverStorable35 [2021-12-15 13:57:22,441 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:22,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:22,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2025170382, now seen corresponding path program 3 times [2021-12-15 13:57:22,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:22,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494388022] [2021-12-15 13:57:22,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:22,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:22,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:22,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494388022] [2021-12-15 13:57:22,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494388022] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:22,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618886681] [2021-12-15 13:57:22,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:57:22,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:22,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:22,533 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:22,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 13:57:22,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 13:57:22,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:22,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-15 13:57:22,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:22,622 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:22,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:22,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:23,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618886681] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:23,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:23,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2021-12-15 13:57:23,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698229083] [2021-12-15 13:57:23,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:23,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 13:57:23,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 13:57:23,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-12-15 13:57:23,072 INFO L87 Difference]: Start difference. First operand 138 states and 156 transitions. Second operand has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:23,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:23,589 INFO L93 Difference]: Finished difference Result 195 states and 215 transitions. [2021-12-15 13:57:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 13:57:23,590 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 29 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) Word has length 30 [2021-12-15 13:57:23,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:23,591 INFO L225 Difference]: With dead ends: 195 [2021-12-15 13:57:23,591 INFO L226 Difference]: Without dead ends: 195 [2021-12-15 13:57:23,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=345, Invalid=1377, Unknown=0, NotChecked=0, Total=1722 [2021-12-15 13:57:23,592 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 264 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:23,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 236 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:57:23,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-15 13:57:23,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 144. [2021-12-15 13:57:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 143 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:23,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 163 transitions. [2021-12-15 13:57:23,595 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 163 transitions. Word has length 30 [2021-12-15 13:57:23,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:23,595 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 163 transitions. [2021-12-15 13:57:23,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.857142857142857) internal successors, (80), 29 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:23,595 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 163 transitions. [2021-12-15 13:57:23,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-15 13:57:23,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:23,596 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:23,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:23,807 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,SelfDestructingSolverStorable36 [2021-12-15 13:57:23,807 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:23,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:23,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1580697398, now seen corresponding path program 3 times [2021-12-15 13:57:23,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:23,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998021404] [2021-12-15 13:57:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:23,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:23,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:23,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998021404] [2021-12-15 13:57:23,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998021404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:23,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985473818] [2021-12-15 13:57:23,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:57:23,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:23,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:23,930 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:23,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 13:57:24,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 13:57:24,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:24,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-15 13:57:24,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:24,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:24,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:57:24,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:57:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:24,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:24,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985473818] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:24,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:24,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2021-12-15 13:57:24,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311797003] [2021-12-15 13:57:24,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:24,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 13:57:24,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:24,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 13:57:24,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-12-15 13:57:24,498 INFO L87 Difference]: Start difference. First operand 144 states and 163 transitions. Second operand has 27 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 27 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:24,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:24,978 INFO L93 Difference]: Finished difference Result 188 states and 208 transitions. [2021-12-15 13:57:24,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 13:57:24,978 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 27 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-15 13:57:24,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:24,979 INFO L225 Difference]: With dead ends: 188 [2021-12-15 13:57:24,979 INFO L226 Difference]: Without dead ends: 188 [2021-12-15 13:57:24,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=1213, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 13:57:24,980 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 301 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:24,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 403 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:57:24,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-15 13:57:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 163. [2021-12-15 13:57:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 160 states have (on average 1.1625) internal successors, (186), 162 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 186 transitions. [2021-12-15 13:57:24,983 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 186 transitions. Word has length 32 [2021-12-15 13:57:24,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:24,983 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 186 transitions. [2021-12-15 13:57:24,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 27 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:24,984 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 186 transitions. [2021-12-15 13:57:24,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-15 13:57:24,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:24,984 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:25,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:25,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-15 13:57:25,191 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:25,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:25,192 INFO L85 PathProgramCache]: Analyzing trace with hash -445225321, now seen corresponding path program 4 times [2021-12-15 13:57:25,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:25,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191376400] [2021-12-15 13:57:25,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:25,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:25,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:25,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191376400] [2021-12-15 13:57:25,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191376400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:25,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386316916] [2021-12-15 13:57:25,320 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:57:25,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:25,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:25,321 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:25,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 13:57:25,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:57:25,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:25,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-15 13:57:25,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:25,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:25,880 INFO L354 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2021-12-15 13:57:25,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 31 [2021-12-15 13:57:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:25,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:26,073 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 44 treesize of output 38 [2021-12-15 13:57:26,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:57:26,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:57:26,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:57:26,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 60 [2021-12-15 13:57:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:26,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386316916] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:26,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:26,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 38 [2021-12-15 13:57:26,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434814705] [2021-12-15 13:57:26,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:26,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-15 13:57:26,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:26,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-15 13:57:26,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 13:57:26,362 INFO L87 Difference]: Start difference. First operand 163 states and 186 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:26,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:26,805 INFO L93 Difference]: Finished difference Result 219 states and 247 transitions. [2021-12-15 13:57:26,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-15 13:57:26,806 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-15 13:57:26,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:26,808 INFO L225 Difference]: With dead ends: 219 [2021-12-15 13:57:26,808 INFO L226 Difference]: Without dead ends: 208 [2021-12-15 13:57:26,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=432, Invalid=2430, Unknown=0, NotChecked=0, Total=2862 [2021-12-15 13:57:26,809 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 142 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:26,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 314 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 251 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2021-12-15 13:57:26,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-15 13:57:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 197. [2021-12-15 13:57:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 194 states have (on average 1.1597938144329898) internal successors, (225), 196 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 225 transitions. [2021-12-15 13:57:26,813 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 225 transitions. Word has length 33 [2021-12-15 13:57:26,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:26,814 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 225 transitions. [2021-12-15 13:57:26,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:26,814 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 225 transitions. [2021-12-15 13:57:26,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-15 13:57:26,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:26,814 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:26,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:27,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-15 13:57:27,027 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:27,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1756979051, now seen corresponding path program 1 times [2021-12-15 13:57:27,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:27,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111061835] [2021-12-15 13:57:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:27,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:27,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:27,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111061835] [2021-12-15 13:57:27,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111061835] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:27,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213808593] [2021-12-15 13:57:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:27,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:27,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:27,133 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:27,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 13:57:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:27,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-15 13:57:27,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:27,231 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:27,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:27,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:27,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213808593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:27,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:27,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2021-12-15 13:57:27,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970111354] [2021-12-15 13:57:27,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:27,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-15 13:57:27,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:27,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-15 13:57:27,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-12-15 13:57:27,716 INFO L87 Difference]: Start difference. First operand 197 states and 225 transitions. Second operand has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 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) [2021-12-15 13:57:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:28,419 INFO L93 Difference]: Finished difference Result 246 states and 272 transitions. [2021-12-15 13:57:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-15 13:57:28,419 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 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) Word has length 33 [2021-12-15 13:57:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:28,420 INFO L225 Difference]: With dead ends: 246 [2021-12-15 13:57:28,420 INFO L226 Difference]: Without dead ends: 246 [2021-12-15 13:57:28,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=412, Invalid=1658, Unknown=0, NotChecked=0, Total=2070 [2021-12-15 13:57:28,421 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 391 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:28,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 242 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:57:28,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-15 13:57:28,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 213. [2021-12-15 13:57:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 210 states have (on average 1.1523809523809523) internal successors, (242), 212 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 242 transitions. [2021-12-15 13:57:28,425 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 242 transitions. Word has length 33 [2021-12-15 13:57:28,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:28,425 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 242 transitions. [2021-12-15 13:57:28,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 28 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) [2021-12-15 13:57:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 242 transitions. [2021-12-15 13:57:28,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 13:57:28,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:28,426 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:28,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:28,635 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,SelfDestructingSolverStorable39 [2021-12-15 13:57:28,636 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:28,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1218138417, now seen corresponding path program 1 times [2021-12-15 13:57:28,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:28,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237460319] [2021-12-15 13:57:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:28,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 13:57:28,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:28,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237460319] [2021-12-15 13:57:28,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237460319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:28,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633131795] [2021-12-15 13:57:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:28,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:28,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:28,829 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:28,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 13:57:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:28,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-15 13:57:28,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:28,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:57:29,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 13:57:29,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 13:57:29,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 13:57:29,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:57:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 13:57:29,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:29,204 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_583 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_583) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-15 13:57:29,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:29,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-15 13:57:29,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:29,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-15 13:57:29,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 13:57:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2021-12-15 13:57:29,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633131795] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:29,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:29,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2021-12-15 13:57:29,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833306021] [2021-12-15 13:57:29,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:29,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 13:57:29,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:29,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 13:57:29,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=560, Unknown=1, NotChecked=48, Total=702 [2021-12-15 13:57:29,451 INFO L87 Difference]: Start difference. First operand 213 states and 242 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:29,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:29,778 INFO L93 Difference]: Finished difference Result 237 states and 263 transitions. [2021-12-15 13:57:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 13:57:29,779 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-15 13:57:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:29,779 INFO L225 Difference]: With dead ends: 237 [2021-12-15 13:57:29,779 INFO L226 Difference]: Without dead ends: 221 [2021-12-15 13:57:29,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=920, Unknown=1, NotChecked=64, Total=1190 [2021-12-15 13:57:29,780 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 138 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:29,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 411 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 265 Invalid, 0 Unknown, 157 Unchecked, 0.1s Time] [2021-12-15 13:57:29,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-15 13:57:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 212. [2021-12-15 13:57:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 209 states have (on average 1.138755980861244) internal successors, (238), 211 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 238 transitions. [2021-12-15 13:57:29,783 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 238 transitions. Word has length 35 [2021-12-15 13:57:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:29,783 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 238 transitions. [2021-12-15 13:57:29,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 238 transitions. [2021-12-15 13:57:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 13:57:29,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:29,783 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:29,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:29,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:29,994 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:29,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:29,995 INFO L85 PathProgramCache]: Analyzing trace with hash 603565394, now seen corresponding path program 4 times [2021-12-15 13:57:29,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:29,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789274268] [2021-12-15 13:57:29,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:29,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:30,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:30,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789274268] [2021-12-15 13:57:30,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789274268] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:30,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521870220] [2021-12-15 13:57:30,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 13:57:30,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:30,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:30,213 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:30,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-15 13:57:30,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 13:57:30,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:30,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-15 13:57:30,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:30,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:57:30,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:57:30,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:30,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:57:32,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:57:32,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:57:32,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:57:32,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-12-15 13:57:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:33,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:33,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:33,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-15 13:57:33,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:33,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-15 13:57:33,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-15 13:57:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:33,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521870220] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:33,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:33,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 39 [2021-12-15 13:57:33,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838713469] [2021-12-15 13:57:33,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:33,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 13:57:33,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:33,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 13:57:33,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1341, Unknown=17, NotChecked=0, Total=1482 [2021-12-15 13:57:33,730 INFO L87 Difference]: Start difference. First operand 212 states and 238 transitions. Second operand has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 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) [2021-12-15 13:57:43,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:43,317 INFO L93 Difference]: Finished difference Result 277 states and 311 transitions. [2021-12-15 13:57:43,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-15 13:57:43,317 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 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) Word has length 36 [2021-12-15 13:57:43,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:43,318 INFO L225 Difference]: With dead ends: 277 [2021-12-15 13:57:43,318 INFO L226 Difference]: Without dead ends: 258 [2021-12-15 13:57:43,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=376, Invalid=3265, Unknown=19, NotChecked=0, Total=3660 [2021-12-15 13:57:43,319 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 148 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:43,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 710 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 328 Invalid, 0 Unknown, 145 Unchecked, 0.1s Time] [2021-12-15 13:57:43,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-15 13:57:43,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 249. [2021-12-15 13:57:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 246 states have (on average 1.1341463414634145) internal successors, (279), 248 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:43,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 279 transitions. [2021-12-15 13:57:43,323 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 279 transitions. Word has length 36 [2021-12-15 13:57:43,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:43,323 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 279 transitions. [2021-12-15 13:57:43,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 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) [2021-12-15 13:57:43,323 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 279 transitions. [2021-12-15 13:57:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 13:57:43,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:43,324 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:43,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:43,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:43,541 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:43,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:43,541 INFO L85 PathProgramCache]: Analyzing trace with hash -541196940, now seen corresponding path program 5 times [2021-12-15 13:57:43,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:43,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492486180] [2021-12-15 13:57:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:43,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:43,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:43,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492486180] [2021-12-15 13:57:43,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492486180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:43,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599812395] [2021-12-15 13:57:43,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:57:43,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:43,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:43,720 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:43,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-15 13:57:43,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-15 13:57:43,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:43,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-15 13:57:43,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:43,844 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:43,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:44,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:44,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599812395] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:44,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:44,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2021-12-15 13:57:44,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221614199] [2021-12-15 13:57:44,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:44,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-15 13:57:44,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:44,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-15 13:57:44,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-12-15 13:57:44,420 INFO L87 Difference]: Start difference. First operand 249 states and 279 transitions. Second operand has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 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) [2021-12-15 13:57:45,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:45,202 INFO L93 Difference]: Finished difference Result 389 states and 424 transitions. [2021-12-15 13:57:45,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 13:57:45,202 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 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) Word has length 37 [2021-12-15 13:57:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:45,203 INFO L225 Difference]: With dead ends: 389 [2021-12-15 13:57:45,204 INFO L226 Difference]: Without dead ends: 389 [2021-12-15 13:57:45,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=442, Invalid=1720, Unknown=0, NotChecked=0, Total=2162 [2021-12-15 13:57:45,205 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 314 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:45,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 448 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 13:57:45,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-12-15 13:57:45,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 258. [2021-12-15 13:57:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 255 states have (on average 1.1372549019607843) internal successors, (290), 257 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:45,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 290 transitions. [2021-12-15 13:57:45,211 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 290 transitions. Word has length 37 [2021-12-15 13:57:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:45,211 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 290 transitions. [2021-12-15 13:57:45,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.103448275862069) internal successors, (90), 30 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) [2021-12-15 13:57:45,211 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 290 transitions. [2021-12-15 13:57:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 13:57:45,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:45,212 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 13:57:45,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:45,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:45,423 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:45,423 INFO L85 PathProgramCache]: Analyzing trace with hash -916383204, now seen corresponding path program 1 times [2021-12-15 13:57:45,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:45,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693812110] [2021-12-15 13:57:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:45,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:45,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:45,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693812110] [2021-12-15 13:57:45,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693812110] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:45,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146269319] [2021-12-15 13:57:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:45,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:45,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:45,574 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:45,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-15 13:57:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:45,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-15 13:57:45,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:45,683 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:45,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:45,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:46,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146269319] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:46,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:46,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2021-12-15 13:57:46,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088604146] [2021-12-15 13:57:46,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:46,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-15 13:57:46,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:46,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-15 13:57:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 13:57:46,333 INFO L87 Difference]: Start difference. First operand 258 states and 290 transitions. Second operand has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:47,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:47,695 INFO L93 Difference]: Finished difference Result 342 states and 371 transitions. [2021-12-15 13:57:47,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-15 13:57:47,695 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-15 13:57:47,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:47,696 INFO L225 Difference]: With dead ends: 342 [2021-12-15 13:57:47,696 INFO L226 Difference]: Without dead ends: 317 [2021-12-15 13:57:47,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=706, Invalid=3076, Unknown=0, NotChecked=0, Total=3782 [2021-12-15 13:57:47,698 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 388 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:47,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 382 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 13:57:47,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-12-15 13:57:47,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 256. [2021-12-15 13:57:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 253 states have (on average 1.1264822134387351) internal successors, (285), 255 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 285 transitions. [2021-12-15 13:57:47,703 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 285 transitions. Word has length 39 [2021-12-15 13:57:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:47,703 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 285 transitions. [2021-12-15 13:57:47,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.212121212121212) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:47,704 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 285 transitions. [2021-12-15 13:57:47,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 13:57:47,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:47,704 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:47,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:47,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:47,911 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:47,912 INFO L85 PathProgramCache]: Analyzing trace with hash 509207573, now seen corresponding path program 6 times [2021-12-15 13:57:47,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:47,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891479427] [2021-12-15 13:57:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:47,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:48,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:48,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891479427] [2021-12-15 13:57:48,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891479427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:48,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431575989] [2021-12-15 13:57:48,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 13:57:48,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:48,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:48,040 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:48,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-15 13:57:48,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-15 13:57:48,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:48,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-15 13:57:48,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:48,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:48,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:57:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:48,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:48,386 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 [2021-12-15 13:57:48,388 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 [2021-12-15 13:57:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:48,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431575989] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:48,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:48,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2021-12-15 13:57:48,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355294017] [2021-12-15 13:57:48,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:48,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 13:57:48,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:48,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 13:57:48,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-12-15 13:57:48,516 INFO L87 Difference]: Start difference. First operand 256 states and 285 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:48,921 INFO L93 Difference]: Finished difference Result 488 states and 529 transitions. [2021-12-15 13:57:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-15 13:57:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-15 13:57:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:48,922 INFO L225 Difference]: With dead ends: 488 [2021-12-15 13:57:48,923 INFO L226 Difference]: Without dead ends: 460 [2021-12-15 13:57:48,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=1179, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 13:57:48,923 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 253 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:48,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 554 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:57:48,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-15 13:57:48,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 291. [2021-12-15 13:57:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 288 states have (on average 1.1284722222222223) internal successors, (325), 290 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:48,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 325 transitions. [2021-12-15 13:57:48,928 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 325 transitions. Word has length 40 [2021-12-15 13:57:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:48,928 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 325 transitions. [2021-12-15 13:57:48,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 325 transitions. [2021-12-15 13:57:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 13:57:48,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:48,929 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:48,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:49,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:49,139 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:49,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:49,140 INFO L85 PathProgramCache]: Analyzing trace with hash 500447765, now seen corresponding path program 5 times [2021-12-15 13:57:49,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:49,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137701436] [2021-12-15 13:57:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:49,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:49,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:49,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137701436] [2021-12-15 13:57:49,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137701436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:49,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277334301] [2021-12-15 13:57:49,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 13:57:49,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:49,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:49,268 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:49,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-15 13:57:49,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 13:57:49,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:49,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-15 13:57:49,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:49,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:57:49,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:57:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:49,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:49,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277334301] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:49,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:49,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2021-12-15 13:57:49,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449169458] [2021-12-15 13:57:49,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:49,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 13:57:49,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:49,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 13:57:49,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-12-15 13:57:49,995 INFO L87 Difference]: Start difference. First operand 291 states and 325 transitions. Second operand has 31 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 31 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) [2021-12-15 13:57:50,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:50,595 INFO L93 Difference]: Finished difference Result 387 states and 425 transitions. [2021-12-15 13:57:50,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 13:57:50,595 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 31 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) Word has length 40 [2021-12-15 13:57:50,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:50,596 INFO L225 Difference]: With dead ends: 387 [2021-12-15 13:57:50,596 INFO L226 Difference]: Without dead ends: 387 [2021-12-15 13:57:50,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=1692, Unknown=0, NotChecked=0, Total=2070 [2021-12-15 13:57:50,597 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 301 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:50,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 480 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 13:57:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-15 13:57:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 329. [2021-12-15 13:57:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 326 states have (on average 1.138036809815951) internal successors, (371), 328 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:50,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 371 transitions. [2021-12-15 13:57:50,601 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 371 transitions. Word has length 40 [2021-12-15 13:57:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:50,601 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 371 transitions. [2021-12-15 13:57:50,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 31 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) [2021-12-15 13:57:50,602 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 371 transitions. [2021-12-15 13:57:50,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 13:57:50,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:50,602 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:50,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:50,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:50,815 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:50,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:50,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2139029910, now seen corresponding path program 2 times [2021-12-15 13:57:50,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:50,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897956882] [2021-12-15 13:57:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:50,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 13:57:51,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:51,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897956882] [2021-12-15 13:57:51,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897956882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:51,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262888717] [2021-12-15 13:57:51,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:57:51,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:51,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:51,098 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:51,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-15 13:57:51,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:57:51,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:51,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-15 13:57:51,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:51,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:57:51,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:51,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:57:51,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:57:51,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 13:57:51,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:57:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 13:57:51,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:51,666 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_825 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_825) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-15 13:57:51,672 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_825 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_825) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-15 13:57:51,678 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_825 (Array Int Int)) (v_ArrVal_824 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_824) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_825) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-15 13:57:51,686 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_825 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_825) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 2)) 0)) is different from false [2021-12-15 13:57:51,701 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_825 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_825) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)) is different from false [2021-12-15 13:57:51,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:51,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-15 13:57:51,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:51,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-15 13:57:51,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 13:57:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 11 not checked. [2021-12-15 13:57:51,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262888717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:51,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:51,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 33 [2021-12-15 13:57:51,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274386833] [2021-12-15 13:57:51,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:51,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 13:57:51,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:51,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 13:57:51,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=675, Unknown=5, NotChecked=280, Total=1056 [2021-12-15 13:57:51,881 INFO L87 Difference]: Start difference. First operand 329 states and 371 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 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) [2021-12-15 13:57:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:52,307 INFO L93 Difference]: Finished difference Result 384 states and 420 transitions. [2021-12-15 13:57:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 13:57:52,308 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 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) Word has length 43 [2021-12-15 13:57:52,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:52,309 INFO L225 Difference]: With dead ends: 384 [2021-12-15 13:57:52,309 INFO L226 Difference]: Without dead ends: 343 [2021-12-15 13:57:52,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 70 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=1058, Unknown=5, NotChecked=350, Total=1560 [2021-12-15 13:57:52,309 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 92 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 465 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:52,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 806 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 654 Invalid, 0 Unknown, 465 Unchecked, 0.2s Time] [2021-12-15 13:57:52,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-15 13:57:52,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 324. [2021-12-15 13:57:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 321 states have (on average 1.1214953271028036) internal successors, (360), 323 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:52,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 360 transitions. [2021-12-15 13:57:52,313 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 360 transitions. Word has length 43 [2021-12-15 13:57:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:52,313 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 360 transitions. [2021-12-15 13:57:52,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 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) [2021-12-15 13:57:52,313 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 360 transitions. [2021-12-15 13:57:52,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 13:57:52,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:52,314 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:52,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:52,527 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,SelfDestructingSolverStorable46 [2021-12-15 13:57:52,527 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:52,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:52,527 INFO L85 PathProgramCache]: Analyzing trace with hash -203339112, now seen corresponding path program 7 times [2021-12-15 13:57:52,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:52,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122793444] [2021-12-15 13:57:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:52,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:52,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:52,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122793444] [2021-12-15 13:57:52,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122793444] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:52,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840885196] [2021-12-15 13:57:52,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 13:57:52,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:52,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:52,664 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:52,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-15 13:57:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:52,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-15 13:57:52,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:52,763 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:57:52,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:57:53,074 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:53,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:53,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840885196] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:53,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:53,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2021-12-15 13:57:53,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856390132] [2021-12-15 13:57:53,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:53,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-15 13:57:53,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:53,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-15 13:57:53,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560 [2021-12-15 13:57:53,499 INFO L87 Difference]: Start difference. First operand 324 states and 360 transitions. Second operand has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:54,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:54,573 INFO L93 Difference]: Finished difference Result 558 states and 603 transitions. [2021-12-15 13:57:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 13:57:54,573 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-15 13:57:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:54,575 INFO L225 Difference]: With dead ends: 558 [2021-12-15 13:57:54,575 INFO L226 Difference]: Without dead ends: 558 [2021-12-15 13:57:54,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=686, Invalid=2974, Unknown=0, NotChecked=0, Total=3660 [2021-12-15 13:57:54,576 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 442 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:54,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 578 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 13:57:54,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-12-15 13:57:54,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 336. [2021-12-15 13:57:54,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 333 states have (on average 1.1261261261261262) internal successors, (375), 335 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:54,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 375 transitions. [2021-12-15 13:57:54,585 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 375 transitions. Word has length 44 [2021-12-15 13:57:54,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:54,586 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 375 transitions. [2021-12-15 13:57:54,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:54,586 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 375 transitions. [2021-12-15 13:57:54,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-15 13:57:54,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:54,588 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:54,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:54,803 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,SelfDestructingSolverStorable47 [2021-12-15 13:57:54,803 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:54,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:54,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1180553501, now seen corresponding path program 6 times [2021-12-15 13:57:54,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:54,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956761783] [2021-12-15 13:57:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:54,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:55,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:55,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956761783] [2021-12-15 13:57:55,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956761783] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:55,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782767965] [2021-12-15 13:57:55,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 13:57:55,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:55,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:55,247 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:55,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-15 13:57:55,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-15 13:57:55,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:55,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-15 13:57:55,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:55,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:57:55,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:55,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:57:55,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:55,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:55,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:57:55,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:55,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:57:56,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:56,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:57:56,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:57:56,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:57:56,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:57:56,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-12-15 13:57:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:56,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:56,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:56,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-15 13:57:56,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:57:56,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-15 13:57:56,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 13:57:57,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 13:57:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:57:57,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782767965] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:57,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:57,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 18] total 55 [2021-12-15 13:57:57,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126973512] [2021-12-15 13:57:57,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:57,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-15 13:57:57,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:57,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-15 13:57:57,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2759, Unknown=4, NotChecked=0, Total=2970 [2021-12-15 13:57:57,137 INFO L87 Difference]: Start difference. First operand 336 states and 375 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:58,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:57:58,577 INFO L93 Difference]: Finished difference Result 431 states and 479 transitions. [2021-12-15 13:57:58,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-15 13:57:58,577 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-15 13:57:58,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:57:58,578 INFO L225 Difference]: With dead ends: 431 [2021-12-15 13:57:58,578 INFO L226 Difference]: Without dead ends: 392 [2021-12-15 13:57:58,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=478, Invalid=5826, Unknown=16, NotChecked=0, Total=6320 [2021-12-15 13:57:58,580 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 289 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 13:57:58,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 789 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 624 Invalid, 0 Unknown, 294 Unchecked, 0.3s Time] [2021-12-15 13:57:58,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-12-15 13:57:58,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 382. [2021-12-15 13:57:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 379 states have (on average 1.1240105540897098) internal successors, (426), 381 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 426 transitions. [2021-12-15 13:57:58,584 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 426 transitions. Word has length 44 [2021-12-15 13:57:58,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:57:58,584 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 426 transitions. [2021-12-15 13:57:58,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:57:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 426 transitions. [2021-12-15 13:57:58,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 13:57:58,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:57:58,585 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:57:58,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-15 13:57:58,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-15 13:57:58,802 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:57:58,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:57:58,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1771580303, now seen corresponding path program 8 times [2021-12-15 13:57:58,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:57:58,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649799290] [2021-12-15 13:57:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:57:58,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:57:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:57:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:58,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:57:58,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649799290] [2021-12-15 13:57:58,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649799290] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:57:58,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836525402] [2021-12-15 13:57:58,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:57:58,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:57:58,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:57:58,959 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:57:58,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-15 13:57:59,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:57:59,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:57:59,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-15 13:57:59,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:57:59,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:57:59,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:57:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:59,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:57:59,519 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 [2021-12-15 13:57:59,522 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 [2021-12-15 13:57:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:57:59,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836525402] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:57:59,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:57:59,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 41 [2021-12-15 13:57:59,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450169190] [2021-12-15 13:57:59,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:57:59,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-15 13:57:59,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:57:59,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-15 13:57:59,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-12-15 13:57:59,842 INFO L87 Difference]: Start difference. First operand 382 states and 426 transitions. Second operand has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 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) [2021-12-15 13:58:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:58:00,534 INFO L93 Difference]: Finished difference Result 771 states and 832 transitions. [2021-12-15 13:58:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-15 13:58:00,535 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 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 47 [2021-12-15 13:58:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:58:00,536 INFO L225 Difference]: With dead ends: 771 [2021-12-15 13:58:00,536 INFO L226 Difference]: Without dead ends: 754 [2021-12-15 13:58:00,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=350, Invalid=2512, Unknown=0, NotChecked=0, Total=2862 [2021-12-15 13:58:00,537 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 445 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:58:00,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 952 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1108 Invalid, 0 Unknown, 138 Unchecked, 0.4s Time] [2021-12-15 13:58:00,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-12-15 13:58:00,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 458. [2021-12-15 13:58:00,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 455 states have (on average 1.123076923076923) internal successors, (511), 457 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) [2021-12-15 13:58:00,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 511 transitions. [2021-12-15 13:58:00,543 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 511 transitions. Word has length 47 [2021-12-15 13:58:00,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:58:00,543 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 511 transitions. [2021-12-15 13:58:00,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 41 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) [2021-12-15 13:58:00,544 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 511 transitions. [2021-12-15 13:58:00,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-15 13:58:00,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:58:00,544 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:58:00,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-15 13:58:00,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:00,755 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:58:00,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:58:00,756 INFO L85 PathProgramCache]: Analyzing trace with hash 588049120, now seen corresponding path program 7 times [2021-12-15 13:58:00,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:58:00,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902067324] [2021-12-15 13:58:00,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:58:00,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:58:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:00,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:58:00,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902067324] [2021-12-15 13:58:00,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902067324] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:58:00,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694241016] [2021-12-15 13:58:00,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 13:58:00,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:00,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:58:00,896 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:58:00,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-15 13:58:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:00,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-15 13:58:00,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:58:01,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 13:58:01,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-15 13:58:01,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:58:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:01,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:58:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:01,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694241016] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:58:01,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:58:01,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2021-12-15 13:58:01,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181157959] [2021-12-15 13:58:01,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:58:01,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 13:58:01,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:58:01,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 13:58:01,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 13:58:01,817 INFO L87 Difference]: Start difference. First operand 458 states and 511 transitions. Second operand has 39 states, 38 states have (on average 3.526315789473684) internal successors, (134), 39 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) [2021-12-15 13:58:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:58:02,828 INFO L93 Difference]: Finished difference Result 579 states and 637 transitions. [2021-12-15 13:58:02,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 13:58:02,829 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.526315789473684) internal successors, (134), 39 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 48 [2021-12-15 13:58:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:58:02,831 INFO L225 Difference]: With dead ends: 579 [2021-12-15 13:58:02,831 INFO L226 Difference]: Without dead ends: 579 [2021-12-15 13:58:02,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=642, Invalid=3018, Unknown=0, NotChecked=0, Total=3660 [2021-12-15 13:58:02,831 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 510 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:58:02,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 679 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 13:58:02,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-12-15 13:58:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 507. [2021-12-15 13:58:02,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 504 states have (on average 1.1349206349206349) internal successors, (572), 506 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:02,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 572 transitions. [2021-12-15 13:58:02,837 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 572 transitions. Word has length 48 [2021-12-15 13:58:02,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:58:02,838 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 572 transitions. [2021-12-15 13:58:02,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.526315789473684) internal successors, (134), 39 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) [2021-12-15 13:58:02,838 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 572 transitions. [2021-12-15 13:58:02,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-15 13:58:02,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:58:02,839 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:58:02,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-15 13:58:03,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:03,050 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:58:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:58:03,050 INFO L85 PathProgramCache]: Analyzing trace with hash 615332876, now seen corresponding path program 2 times [2021-12-15 13:58:03,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:58:03,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038658745] [2021-12-15 13:58:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:58:03,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:58:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:03,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:58:03,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038658745] [2021-12-15 13:58:03,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038658745] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:58:03,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432541525] [2021-12-15 13:58:03,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:58:03,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:03,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:58:03,264 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:58:03,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-15 13:58:03,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:58:03,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:58:03,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-15 13:58:03,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:58:03,418 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:58:03,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-15 13:58:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:03,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:58:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:04,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432541525] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:58:04,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:58:04,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2021-12-15 13:58:04,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424136967] [2021-12-15 13:58:04,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:58:04,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-15 13:58:04,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:58:04,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-15 13:58:04,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-12-15 13:58:04,334 INFO L87 Difference]: Start difference. First operand 507 states and 572 transitions. Second operand has 40 states, 39 states have (on average 3.41025641025641) internal successors, (133), 40 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:58:06,576 INFO L93 Difference]: Finished difference Result 612 states and 673 transitions. [2021-12-15 13:58:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-15 13:58:06,576 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.41025641025641) internal successors, (133), 40 states have internal predecessors, (133), 0 states have call successors, (0), 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 48 [2021-12-15 13:58:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:58:06,578 INFO L225 Difference]: With dead ends: 612 [2021-12-15 13:58:06,578 INFO L226 Difference]: Without dead ends: 612 [2021-12-15 13:58:06,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1442, Invalid=5698, Unknown=0, NotChecked=0, Total=7140 [2021-12-15 13:58:06,579 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 867 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 13:58:06,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 508 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 13:58:06,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-12-15 13:58:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 535. [2021-12-15 13:58:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 532 states have (on average 1.131578947368421) internal successors, (602), 534 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:06,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 602 transitions. [2021-12-15 13:58:06,584 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 602 transitions. Word has length 48 [2021-12-15 13:58:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:58:06,584 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 602 transitions. [2021-12-15 13:58:06,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.41025641025641) internal successors, (133), 40 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:06,585 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 602 transitions. [2021-12-15 13:58:06,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 13:58:06,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:58:06,585 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:58:06,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-15 13:58:06,799 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,SelfDestructingSolverStorable51 [2021-12-15 13:58:06,799 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:58:06,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:58:06,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1424251762, now seen corresponding path program 9 times [2021-12-15 13:58:06,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:58:06,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969315892] [2021-12-15 13:58:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:58:06,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:58:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:06,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:58:06,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969315892] [2021-12-15 13:58:06,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969315892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:58:06,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859940638] [2021-12-15 13:58:06,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:58:06,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:06,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:58:06,995 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:58:07,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-15 13:58:07,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-15 13:58:07,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:58:07,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-15 13:58:07,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:58:07,146 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-15 13:58:07,146 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 [2021-12-15 13:58:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:07,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:58:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 45 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:08,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859940638] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:58:08,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:58:08,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 46 [2021-12-15 13:58:08,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427640302] [2021-12-15 13:58:08,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:58:08,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-15 13:58:08,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:58:08,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-15 13:58:08,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1879, Unknown=0, NotChecked=0, Total=2162 [2021-12-15 13:58:08,125 INFO L87 Difference]: Start difference. First operand 535 states and 602 transitions. Second operand has 47 states, 46 states have (on average 3.108695652173913) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:09,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:58:09,478 INFO L93 Difference]: Finished difference Result 956 states and 1038 transitions. [2021-12-15 13:58:09,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-15 13:58:09,479 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.108695652173913) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 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 [2021-12-15 13:58:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:58:09,481 INFO L225 Difference]: With dead ends: 956 [2021-12-15 13:58:09,481 INFO L226 Difference]: Without dead ends: 956 [2021-12-15 13:58:09,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=996, Invalid=4116, Unknown=0, NotChecked=0, Total=5112 [2021-12-15 13:58:09,482 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 662 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 13:58:09,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 559 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 13:58:09,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-12-15 13:58:09,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 550. [2021-12-15 13:58:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 547 states have (on average 1.1352833638025595) internal successors, (621), 549 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 621 transitions. [2021-12-15 13:58:09,491 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 621 transitions. Word has length 51 [2021-12-15 13:58:09,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:58:09,491 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 621 transitions. [2021-12-15 13:58:09,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.108695652173913) internal successors, (143), 47 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:09,492 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 621 transitions. [2021-12-15 13:58:09,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 13:58:09,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:58:09,493 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:58:09,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-15 13:58:09,743 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,SelfDestructingSolverStorable52 [2021-12-15 13:58:09,743 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:58:09,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:58:09,744 INFO L85 PathProgramCache]: Analyzing trace with hash 461326971, now seen corresponding path program 3 times [2021-12-15 13:58:09,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:58:09,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815841766] [2021-12-15 13:58:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:58:09,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:58:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 13:58:10,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:58:10,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815841766] [2021-12-15 13:58:10,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815841766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:58:10,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486495032] [2021-12-15 13:58:10,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 13:58:10,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:10,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:58:10,092 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:58:10,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-15 13:58:10,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-15 13:58:10,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:58:10,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-15 13:58:10,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:58:10,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:58:10,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:58:10,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:58:10,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:58:10,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 13:58:10,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 13:58:10,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:58:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 13:58:10,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:58:10,754 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1152 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1152) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-15 13:58:10,760 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1152 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1152) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-15 13:58:10,766 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1152 (Array Int Int)) (v_ArrVal_1151 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1151) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1152) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-15 13:58:10,773 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1152 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1152) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 2)) 0)) is different from false [2021-12-15 13:58:10,779 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1152 (Array Int Int)) (v_ArrVal_1150 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1150) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1152) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 2)) 0)) is different from false [2021-12-15 13:58:10,786 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1152 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1152) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 3)) 0)) is different from false [2021-12-15 13:58:10,801 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1152 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1152) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0)) is different from false [2021-12-15 13:58:10,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:58:10,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-15 13:58:10,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:58:10,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-15 13:58:10,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 13:58:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 23 not checked. [2021-12-15 13:58:11,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486495032] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:58:11,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:58:11,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 40 [2021-12-15 13:58:11,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924928385] [2021-12-15 13:58:11,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:58:11,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-15 13:58:11,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:58:11,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-15 13:58:11,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=965, Unknown=7, NotChecked=476, Total=1560 [2021-12-15 13:58:11,028 INFO L87 Difference]: Start difference. First operand 550 states and 621 transitions. Second operand has 40 states, 40 states have (on average 2.7) internal successors, (108), 40 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) [2021-12-15 13:58:11,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:58:11,760 INFO L93 Difference]: Finished difference Result 637 states and 700 transitions. [2021-12-15 13:58:11,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 13:58:11,760 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.7) internal successors, (108), 40 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) Word has length 51 [2021-12-15 13:58:11,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:58:11,761 INFO L225 Difference]: With dead ends: 637 [2021-12-15 13:58:11,761 INFO L226 Difference]: Without dead ends: 586 [2021-12-15 13:58:11,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 80 SyntacticMatches, 12 SemanticMatches, 48 ConstructedPredicates, 7 IntricatePredicates, 1 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=1647, Unknown=7, NotChecked=616, Total=2450 [2021-12-15 13:58:11,762 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 168 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 904 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 13:58:11,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1175 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 969 Invalid, 0 Unknown, 904 Unchecked, 0.4s Time] [2021-12-15 13:58:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-12-15 13:58:11,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 546. [2021-12-15 13:58:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 543 states have (on average 1.1215469613259668) internal successors, (609), 545 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:58:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 609 transitions. [2021-12-15 13:58:11,768 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 609 transitions. Word has length 51 [2021-12-15 13:58:11,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:58:11,768 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 609 transitions. [2021-12-15 13:58:11,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.7) internal successors, (108), 40 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) [2021-12-15 13:58:11,768 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 609 transitions. [2021-12-15 13:58:11,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-15 13:58:11,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:58:11,769 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:58:11,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-15 13:58:11,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:11,986 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-15 13:58:11,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:58:11,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1427430296, now seen corresponding path program 8 times [2021-12-15 13:58:11,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:58:11,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369316403] [2021-12-15 13:58:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:58:11,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:58:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:58:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:12,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:58:12,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369316403] [2021-12-15 13:58:12,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369316403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:58:12,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134107135] [2021-12-15 13:58:12,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:58:12,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:58:12,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:58:12,619 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:58:12,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-15 13:58:12,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 13:58:12,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:58:12,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-15 13:58:12,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:58:12,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 13:58:13,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-15 13:58:13,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:58:13,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-15 13:58:13,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 13:58:13,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-15 13:58:13,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 13:58:13,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 13:58:13,348 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:58:13,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:58:13,377 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1215 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1215) |c_ULTIMATE.start_cstrcat_~append#1.base|) |c_ULTIMATE.start_cstrcat_~append#1.offset|) 0)) is different from false [2021-12-15 13:58:13,382 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1215 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1215) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-15 13:58:13,388 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1215 (Array Int Int)) (v_ArrVal_1214 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1214) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1215) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 1)) 0)) is different from false [2021-12-15 13:58:13,394 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1215 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1215) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 2)) 0)) is different from false [2021-12-15 13:58:13,399 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1215 (Array Int Int)) (v_ArrVal_1213 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1213) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1215) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 2)) 0)) is different from false [2021-12-15 13:58:13,405 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1215 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1215) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 3)) 0)) is different from false [2021-12-15 13:58:13,410 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1215 (Array Int Int)) (v_ArrVal_1212 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1212) |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1215) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 3)) 0)) is different from false [2021-12-15 13:58:13,416 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1215 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s#1.base| v_ArrVal_1215) |c_ULTIMATE.start_cstrcat_~append#1.base|) (+ |c_ULTIMATE.start_cstrcat_~append#1.offset| 4)) 0)) is different from false [2021-12-15 13:58:13,424 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1215 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1215) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0)) is different from false [2021-12-15 13:58:13,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:58:13,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-15 13:58:13,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 13:58:13,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-15 13:58:13,436 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