./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/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 bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 19:35:23,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 19:35:23,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 19:35:23,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 19:35:23,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 19:35:23,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 19:35:23,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 19:35:23,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 19:35:23,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 19:35:23,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 19:35:23,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 19:35:23,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 19:35:23,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 19:35:23,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 19:35:23,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 19:35:23,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 19:35:23,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 19:35:23,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 19:35:23,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 19:35:23,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 19:35:23,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 19:35:23,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 19:35:23,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 19:35:23,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 19:35:23,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 19:35:23,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 19:35:23,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 19:35:23,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 19:35:23,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 19:35:23,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 19:35:23,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 19:35:23,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 19:35:23,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 19:35:23,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 19:35:23,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 19:35:23,258 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 19:35:23,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 19:35:23,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 19:35:23,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 19:35:23,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 19:35:23,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 19:35:23,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 19:35:23,295 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 19:35:23,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 19:35:23,296 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 19:35:23,296 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 19:35:23,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 19:35:23,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 19:35:23,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 19:35:23,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 19:35:23,298 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 19:35:23,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 19:35:23,299 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 19:35:23,299 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 19:35:23,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 19:35:23,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 19:35:23,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 19:35:23,300 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 19:35:23,300 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 19:35:23,300 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 19:35:23,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 19:35:23,301 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 19:35:23,301 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 19:35:23,301 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 19:35:23,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 19:35:23,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 19:35:23,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 19:35:23,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:35:23,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 19:35:23,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 19:35:23,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 19:35:23,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 19:35:23,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 19:35:23,303 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e [2021-12-18 19:35:23,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 19:35:23,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 19:35:23,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 19:35:23,579 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 19:35:23,580 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 19:35:23,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2021-12-18 19:35:23,642 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46d23c7dc/971457c877024c09a05c4d459eb3268d/FLAGa06eaa0de [2021-12-18 19:35:24,111 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 19:35:24,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2021-12-18 19:35:24,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46d23c7dc/971457c877024c09a05c4d459eb3268d/FLAGa06eaa0de [2021-12-18 19:35:24,612 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46d23c7dc/971457c877024c09a05c4d459eb3268d [2021-12-18 19:35:24,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 19:35:24,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 19:35:24,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 19:35:24,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 19:35:24,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 19:35:24,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c508a88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24, skipping insertion in model container [2021-12-18 19:35:24,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 19:35:24,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 19:35:24,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:35:24,910 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 19:35:24,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 19:35:24,974 INFO L208 MainTranslator]: Completed translation [2021-12-18 19:35:24,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24 WrapperNode [2021-12-18 19:35:24,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 19:35:24,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 19:35:24,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 19:35:24,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 19:35:24,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:24,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:25,021 INFO L137 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2021-12-18 19:35:25,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 19:35:25,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 19:35:25,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 19:35:25,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 19:35:25,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:25,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:25,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:25,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:25,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:25,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:25,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:25,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 19:35:25,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 19:35:25,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 19:35:25,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 19:35:25,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (1/1) ... [2021-12-18 19:35:25,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 19:35:25,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:25,105 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 19:35:25,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 19:35:25,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 19:35:25,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 19:35:25,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 19:35:25,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 19:35:25,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 19:35:25,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 19:35:25,311 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 19:35:25,313 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 19:35:25,548 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 19:35:25,553 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 19:35:25,553 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-18 19:35:25,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:35:25 BoogieIcfgContainer [2021-12-18 19:35:25,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 19:35:25,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 19:35:25,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 19:35:25,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 19:35:25,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 07:35:24" (1/3) ... [2021-12-18 19:35:25,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ecd0aa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:35:25, skipping insertion in model container [2021-12-18 19:35:25,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 07:35:24" (2/3) ... [2021-12-18 19:35:25,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ecd0aa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 07:35:25, skipping insertion in model container [2021-12-18 19:35:25,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 07:35:25" (3/3) ... [2021-12-18 19:35:25,569 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcat-alloca-2.i [2021-12-18 19:35:25,573 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 19:35:25,574 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-12-18 19:35:25,613 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 19:35:25,620 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 19:35:25,620 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-12-18 19:35:25,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 43 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) [2021-12-18 19:35:25,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:35:25,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:25,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:25,638 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)] === [2021-12-18 19:35:25,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:25,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031098, now seen corresponding path program 1 times [2021-12-18 19:35:25,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:25,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259209863] [2021-12-18 19:35:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:25,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:25,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:25,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259209863] [2021-12-18 19:35:25,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259209863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:25,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:25,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:35:25,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882948179] [2021-12-18 19:35:25,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:25,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:25,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:25,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:25,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:25,850 INFO L87 Difference]: Start difference. First operand has 44 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 43 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) 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) [2021-12-18 19:35:25,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:25,998 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2021-12-18 19:35:26,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:26,001 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 [2021-12-18 19:35:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:26,007 INFO L225 Difference]: With dead ends: 124 [2021-12-18 19:35:26,008 INFO L226 Difference]: Without dead ends: 118 [2021-12-18 19:35:26,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:35:26,013 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 212 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:26,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 158 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:26,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-18 19:35:26,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 45. [2021-12-18 19:35:26,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.8) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:26,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-12-18 19:35:26,043 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 7 [2021-12-18 19:35:26,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:26,043 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-12-18 19:35:26,043 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) [2021-12-18 19:35:26,043 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-12-18 19:35:26,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 19:35:26,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:26,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:26,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 19:35:26,045 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)] === [2021-12-18 19:35:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:26,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033020, now seen corresponding path program 1 times [2021-12-18 19:35:26,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:26,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246124640] [2021-12-18 19:35:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:26,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246124640] [2021-12-18 19:35:26,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246124640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:26,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:26,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:35:26,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133438931] [2021-12-18 19:35:26,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:26,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:35:26,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:26,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:35:26,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:26,072 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:26,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:26,093 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-12-18 19:35:26,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:35:26,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 19:35:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:26,095 INFO L225 Difference]: With dead ends: 46 [2021-12-18 19:35:26,095 INFO L226 Difference]: Without dead ends: 45 [2021-12-18 19:35:26,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:26,097 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 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 [2021-12-18 19:35:26,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:26,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-18 19:35:26,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-12-18 19:35:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:26,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-18 19:35:26,103 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2021-12-18 19:35:26,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:26,104 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-18 19:35:26,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:26,104 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-18 19:35:26,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 19:35:26,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:26,105 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:26,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 19:35:26,106 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:26,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:26,108 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2021-12-18 19:35:26,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:26,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429976069] [2021-12-18 19:35:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:26,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429976069] [2021-12-18 19:35:26,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429976069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:26,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:26,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:26,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993352477] [2021-12-18 19:35:26,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:26,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:26,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:26,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:26,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:26,175 INFO L87 Difference]: Start difference. First operand 42 states and 48 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) [2021-12-18 19:35:26,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:26,209 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-12-18 19:35:26,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:26,212 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 [2021-12-18 19:35:26,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:26,213 INFO L225 Difference]: With dead ends: 76 [2021-12-18 19:35:26,213 INFO L226 Difference]: Without dead ends: 76 [2021-12-18 19:35:26,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:26,215 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:26,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-18 19:35:26,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 46. [2021-12-18 19:35:26,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:26,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-12-18 19:35:26,220 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 8 [2021-12-18 19:35:26,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:26,221 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-12-18 19:35:26,221 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) [2021-12-18 19:35:26,221 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-12-18 19:35:26,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 19:35:26,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:26,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:26,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 19:35:26,222 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:26,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:26,223 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2021-12-18 19:35:26,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:26,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804884646] [2021-12-18 19:35:26,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:26,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804884646] [2021-12-18 19:35:26,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804884646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:26,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:26,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 19:35:26,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206441154] [2021-12-18 19:35:26,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:26,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:26,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:26,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:26,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:26,294 INFO L87 Difference]: Start difference. First operand 46 states and 54 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) [2021-12-18 19:35:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:26,361 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2021-12-18 19:35:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:26,361 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 [2021-12-18 19:35:26,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:26,365 INFO L225 Difference]: With dead ends: 82 [2021-12-18 19:35:26,365 INFO L226 Difference]: Without dead ends: 82 [2021-12-18 19:35:26,365 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 [2021-12-18 19:35:26,368 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 103 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:26,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 157 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-18 19:35:26,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 46. [2021-12-18 19:35:26,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-12-18 19:35:26,373 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 8 [2021-12-18 19:35:26,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:26,374 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-12-18 19:35:26,374 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) [2021-12-18 19:35:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-12-18 19:35:26,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 19:35:26,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:26,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:26,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 19:35:26,375 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:26,376 INFO L85 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2021-12-18 19:35:26,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:26,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177558002] [2021-12-18 19:35:26,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:26,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177558002] [2021-12-18 19:35:26,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177558002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:26,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:26,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:35:26,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194042094] [2021-12-18 19:35:26,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:26,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:35:26,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:26,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:35:26,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:26,432 INFO L87 Difference]: Start difference. First operand 46 states and 54 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) [2021-12-18 19:35:26,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:26,452 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2021-12-18 19:35:26,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:35:26,453 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 [2021-12-18 19:35:26,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:26,453 INFO L225 Difference]: With dead ends: 44 [2021-12-18 19:35:26,453 INFO L226 Difference]: Without dead ends: 44 [2021-12-18 19:35:26,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:26,455 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 36 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 [2021-12-18 19:35:26,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 36 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-18 19:35:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-18 19:35:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-18 19:35:26,458 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 8 [2021-12-18 19:35:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:26,459 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-18 19:35:26,459 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) [2021-12-18 19:35:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-18 19:35:26,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-18 19:35:26,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:26,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:26,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 19:35:26,460 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:26,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:26,461 INFO L85 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2021-12-18 19:35:26,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:26,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966458384] [2021-12-18 19:35:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:26,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966458384] [2021-12-18 19:35:26,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966458384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:26,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:26,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:26,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19397757] [2021-12-18 19:35:26,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:26,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:26,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:26,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:26,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:26,534 INFO L87 Difference]: Start difference. First operand 44 states and 52 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) [2021-12-18 19:35:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:26,599 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-12-18 19:35:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:26,600 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 [2021-12-18 19:35:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:26,601 INFO L225 Difference]: With dead ends: 77 [2021-12-18 19:35:26,601 INFO L226 Difference]: Without dead ends: 77 [2021-12-18 19:35:26,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:26,604 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:26,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-18 19:35:26,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 46. [2021-12-18 19:35:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.6666666666666667) 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) [2021-12-18 19:35:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-18 19:35:26,610 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 8 [2021-12-18 19:35:26,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:26,610 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-18 19:35:26,610 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) [2021-12-18 19:35:26,611 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-18 19:35:26,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:35:26,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:26,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:26,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 19:35:26,611 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:26,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:26,612 INFO L85 PathProgramCache]: Analyzing trace with hash 690580011, now seen corresponding path program 1 times [2021-12-18 19:35:26,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:26,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337530944] [2021-12-18 19:35:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:26,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:26,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337530944] [2021-12-18 19:35:26,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337530944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:26,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:26,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:26,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688917107] [2021-12-18 19:35:26,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:26,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:26,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:26,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:26,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:26,655 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) [2021-12-18 19:35:26,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:26,677 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-12-18 19:35:26,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:26,677 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 [2021-12-18 19:35:26,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:26,678 INFO L225 Difference]: With dead ends: 52 [2021-12-18 19:35:26,678 INFO L226 Difference]: Without dead ends: 52 [2021-12-18 19:35:26,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:26,679 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 47 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:26,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 76 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-18 19:35:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-12-18 19:35:26,682 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) [2021-12-18 19:35:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-12-18 19:35:26,685 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 10 [2021-12-18 19:35:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:26,685 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-12-18 19:35:26,686 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) [2021-12-18 19:35:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-12-18 19:35:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:35:26,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:26,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:26,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 19:35:26,687 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:26,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:26,689 INFO L85 PathProgramCache]: Analyzing trace with hash 690580063, now seen corresponding path program 1 times [2021-12-18 19:35:26,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:26,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143974589] [2021-12-18 19:35:26,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:26,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143974589] [2021-12-18 19:35:26,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143974589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:26,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:26,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 19:35:26,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818548067] [2021-12-18 19:35:26,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:26,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 19:35:26,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:26,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 19:35:26,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:26,719 INFO L87 Difference]: Start difference. First operand 47 states and 56 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) [2021-12-18 19:35:26,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:26,736 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-12-18 19:35:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 19:35:26,736 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 [2021-12-18 19:35:26,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:26,737 INFO L225 Difference]: With dead ends: 45 [2021-12-18 19:35:26,737 INFO L226 Difference]: Without dead ends: 45 [2021-12-18 19:35:26,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 19:35:26,738 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 [2021-12-18 19:35:26,738 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] [2021-12-18 19:35:26,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-18 19:35:26,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-18 19:35:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.588235294117647) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:26,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-12-18 19:35:26,743 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 10 [2021-12-18 19:35:26,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:26,744 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-12-18 19:35:26,744 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) [2021-12-18 19:35:26,744 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-12-18 19:35:26,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 19:35:26,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:26,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:26,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 19:35:26,745 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:26,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:26,748 INFO L85 PathProgramCache]: Analyzing trace with hash 690580064, now seen corresponding path program 1 times [2021-12-18 19:35:26,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:26,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915883089] [2021-12-18 19:35:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:26,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915883089] [2021-12-18 19:35:26,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915883089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:26,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:26,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:26,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058103160] [2021-12-18 19:35:26,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:26,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:26,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:26,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:26,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:26,809 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:26,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:26,861 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2021-12-18 19:35:26,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:26,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-18 19:35:26,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:26,863 INFO L225 Difference]: With dead ends: 48 [2021-12-18 19:35:26,863 INFO L226 Difference]: Without dead ends: 48 [2021-12-18 19:35:26,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:35:26,865 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:26,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 58 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:26,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-18 19:35:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-12-18 19:35:26,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.5714285714285714) 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) [2021-12-18 19:35:26,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-18 19:35:26,881 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2021-12-18 19:35:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:26,882 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-18 19:35:26,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:26,882 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-18 19:35:26,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 19:35:26,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:26,883 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:26,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-18 19:35:26,883 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:26,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1736941833, now seen corresponding path program 1 times [2021-12-18 19:35:26,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:26,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904644759] [2021-12-18 19:35:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:26,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:26,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904644759] [2021-12-18 19:35:26,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904644759] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:26,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570891253] [2021-12-18 19:35:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:26,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:26,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:26,991 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:27,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 19:35:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:27,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 19:35:27,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:27,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:35:27,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:35:27,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:35:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:27,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:27,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570891253] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:27,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:27,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-18 19:35:27,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395379809] [2021-12-18 19:35:27,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:27,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:35:27,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:27,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:35:27,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:35:27,438 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:27,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:27,587 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2021-12-18 19:35:27,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:35:27,588 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-18 19:35:27,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:27,588 INFO L225 Difference]: With dead ends: 106 [2021-12-18 19:35:27,589 INFO L226 Difference]: Without dead ends: 106 [2021-12-18 19:35:27,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-18 19:35:27,590 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 185 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:27,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 168 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:27,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-18 19:35:27,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 43. [2021-12-18 19:35:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-18 19:35:27,598 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 12 [2021-12-18 19:35:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:27,598 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-18 19:35:27,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:27,599 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-18 19:35:27,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 19:35:27,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:27,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:27,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:27,815 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,SelfDestructingSolverStorable9 [2021-12-18 19:35:27,816 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:27,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:27,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1202382830, now seen corresponding path program 1 times [2021-12-18 19:35:27,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:27,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606610857] [2021-12-18 19:35:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:27,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:27,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:27,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606610857] [2021-12-18 19:35:27,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606610857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:27,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:27,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:27,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384629546] [2021-12-18 19:35:27,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:27,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:27,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:27,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:27,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:27,883 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:27,902 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2021-12-18 19:35:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:27,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-18 19:35:27,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:27,903 INFO L225 Difference]: With dead ends: 42 [2021-12-18 19:35:27,903 INFO L226 Difference]: Without dead ends: 42 [2021-12-18 19:35:27,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:27,904 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:27,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 31 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:27,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-18 19:35:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-18 19:35:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:27,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-12-18 19:35:27,907 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 14 [2021-12-18 19:35:27,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:27,907 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-12-18 19:35:27,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:27,907 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-12-18 19:35:27,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 19:35:27,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:27,908 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:27,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 19:35:27,908 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:27,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:27,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1202382883, now seen corresponding path program 1 times [2021-12-18 19:35:27,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:27,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740505860] [2021-12-18 19:35:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:27,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:27,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:27,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740505860] [2021-12-18 19:35:27,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740505860] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:27,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717482706] [2021-12-18 19:35:27,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:27,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:27,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:27,953 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:27,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 19:35:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:27,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 19:35:27,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:28,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:28,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717482706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:28,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:35:28,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-18 19:35:28,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178415891] [2021-12-18 19:35:28,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:28,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:28,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:28,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:28,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:35:28,055 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:28,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:28,078 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-12-18 19:35:28,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:28,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-18 19:35:28,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:28,079 INFO L225 Difference]: With dead ends: 71 [2021-12-18 19:35:28,079 INFO L226 Difference]: Without dead ends: 71 [2021-12-18 19:35:28,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:35:28,080 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 49 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:28,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 106 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:28,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-18 19:35:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2021-12-18 19:35:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 50 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) [2021-12-18 19:35:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2021-12-18 19:35:28,090 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 14 [2021-12-18 19:35:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:28,090 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2021-12-18 19:35:28,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:28,091 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2021-12-18 19:35:28,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 19:35:28,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:28,092 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:28,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:28,306 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,SelfDestructingSolverStorable11 [2021-12-18 19:35:28,306 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:28,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:28,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1903447461, now seen corresponding path program 1 times [2021-12-18 19:35:28,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:28,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47111216] [2021-12-18 19:35:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:28,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:28,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:28,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47111216] [2021-12-18 19:35:28,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47111216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:28,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645738982] [2021-12-18 19:35:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:28,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:28,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:28,376 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:28,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 19:35:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:28,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 19:35:28,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:28,454 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:35:28,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:35:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:28,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:28,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645738982] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:28,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:28,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-18 19:35:28,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156998976] [2021-12-18 19:35:28,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:28,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 19:35:28,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:28,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 19:35:28,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:35:28,709 INFO L87 Difference]: Start difference. First operand 51 states and 60 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) [2021-12-18 19:35:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:28,818 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-12-18 19:35:28,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:35:28,818 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 [2021-12-18 19:35:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:28,819 INFO L225 Difference]: With dead ends: 73 [2021-12-18 19:35:28,819 INFO L226 Difference]: Without dead ends: 73 [2021-12-18 19:35:28,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:35:28,821 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 116 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:28,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 123 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:28,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-18 19:35:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2021-12-18 19:35:28,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2021-12-18 19:35:28,824 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 14 [2021-12-18 19:35:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:28,824 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2021-12-18 19:35:28,825 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) [2021-12-18 19:35:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2021-12-18 19:35:28,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 19:35:28,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:28,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:28,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:29,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:29,056 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1380837930, now seen corresponding path program 1 times [2021-12-18 19:35:29,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:29,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56954467] [2021-12-18 19:35:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:29,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:29,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:29,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56954467] [2021-12-18 19:35:29,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56954467] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:29,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895735304] [2021-12-18 19:35:29,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:29,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:29,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:29,134 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:29,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 19:35:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:29,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 19:35:29,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:29,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:29,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-18 19:35:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:29,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895735304] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:29,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:29,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2021-12-18 19:35:29,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687715173] [2021-12-18 19:35:29,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:29,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 19:35:29,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:29,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 19:35:29,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:35:29,413 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:29,532 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2021-12-18 19:35:29,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:35:29,533 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-18 19:35:29,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:29,535 INFO L225 Difference]: With dead ends: 92 [2021-12-18 19:35:29,535 INFO L226 Difference]: Without dead ends: 92 [2021-12-18 19:35:29,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:35:29,536 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 157 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:29,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 228 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:29,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-18 19:35:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2021-12-18 19:35:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.296875) internal successors, (83), 71 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2021-12-18 19:35:29,539 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 15 [2021-12-18 19:35:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:29,540 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2021-12-18 19:35:29,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2021-12-18 19:35:29,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-18 19:35:29,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:29,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:29,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:29,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:29,759 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:29,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:29,759 INFO L85 PathProgramCache]: Analyzing trace with hash -679773352, now seen corresponding path program 1 times [2021-12-18 19:35:29,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:29,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763115070] [2021-12-18 19:35:29,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:29,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:29,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:29,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:29,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763115070] [2021-12-18 19:35:29,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763115070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:29,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973692603] [2021-12-18 19:35:29,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:29,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:29,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:29,862 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:29,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 19:35:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:29,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-18 19:35:29,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:29,951 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:35:29,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:35:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:30,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:30,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973692603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:30,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:35:30,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-18 19:35:30,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419545676] [2021-12-18 19:35:30,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:30,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:30,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:30,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:30,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:35:30,015 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:30,030 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2021-12-18 19:35:30,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:30,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-18 19:35:30,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:30,031 INFO L225 Difference]: With dead ends: 71 [2021-12-18 19:35:30,032 INFO L226 Difference]: Without dead ends: 71 [2021-12-18 19:35:30,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:35:30,034 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:30,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 38 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:30,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-18 19:35:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2021-12-18 19:35:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-12-18 19:35:30,036 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 15 [2021-12-18 19:35:30,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:30,037 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-12-18 19:35:30,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-12-18 19:35:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 19:35:30,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:30,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:30,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:30,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-18 19:35:30,260 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:30,260 INFO L85 PathProgramCache]: Analyzing trace with hash 159643962, now seen corresponding path program 1 times [2021-12-18 19:35:30,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:30,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117473372] [2021-12-18 19:35:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:30,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:30,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:30,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117473372] [2021-12-18 19:35:30,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117473372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:30,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:30,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:30,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081969905] [2021-12-18 19:35:30,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:30,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:30,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:30,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:30,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:30,295 INFO L87 Difference]: Start difference. First operand 48 states and 57 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) [2021-12-18 19:35:30,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:30,319 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2021-12-18 19:35:30,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:30,320 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 [2021-12-18 19:35:30,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:30,320 INFO L225 Difference]: With dead ends: 47 [2021-12-18 19:35:30,320 INFO L226 Difference]: Without dead ends: 47 [2021-12-18 19:35:30,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:30,321 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:30,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 46 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:30,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-18 19:35:30,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-18 19:35:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.3658536585365855) 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) [2021-12-18 19:35:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-12-18 19:35:30,323 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 17 [2021-12-18 19:35:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:30,323 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-12-18 19:35:30,324 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) [2021-12-18 19:35:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-12-18 19:35:30,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-18 19:35:30,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:30,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:30,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-18 19:35:30,325 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:30,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:30,325 INFO L85 PathProgramCache]: Analyzing trace with hash 159643963, now seen corresponding path program 1 times [2021-12-18 19:35:30,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:30,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907901456] [2021-12-18 19:35:30,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:30,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:30,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:30,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907901456] [2021-12-18 19:35:30,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907901456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:30,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:30,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:30,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351752025] [2021-12-18 19:35:30,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:30,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:30,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:30,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:30,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:30,372 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:30,406 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2021-12-18 19:35:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:30,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-18 19:35:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:30,407 INFO L225 Difference]: With dead ends: 50 [2021-12-18 19:35:30,407 INFO L226 Difference]: Without dead ends: 50 [2021-12-18 19:35:30,407 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 [2021-12-18 19:35:30,407 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 59 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:30,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 56 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-18 19:35:30,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-12-18 19:35:30,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-12-18 19:35:30,410 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 17 [2021-12-18 19:35:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:30,410 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-12-18 19:35:30,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-12-18 19:35:30,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 19:35:30,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:30,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:30,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-18 19:35:30,411 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:30,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:30,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1200973612, now seen corresponding path program 1 times [2021-12-18 19:35:30,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:30,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134319238] [2021-12-18 19:35:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:30,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:30,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:30,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134319238] [2021-12-18 19:35:30,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134319238] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:30,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927513912] [2021-12-18 19:35:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:30,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:30,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:30,472 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:30,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 19:35:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:30,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 19:35:30,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:30,585 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 [2021-12-18 19:35:30,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:35:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:30,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 19:35:30,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927513912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:30,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 19:35:30,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2021-12-18 19:35:30,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728278361] [2021-12-18 19:35:30,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:30,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:35:30,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:30,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:35:30,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-18 19:35:30,625 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:30,678 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2021-12-18 19:35:30,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:35:30,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2021-12-18 19:35:30,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:30,679 INFO L225 Difference]: With dead ends: 93 [2021-12-18 19:35:30,679 INFO L226 Difference]: Without dead ends: 93 [2021-12-18 19:35:30,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:35:30,680 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 65 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:30,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 154 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-18 19:35:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2021-12-18 19:35:30,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.25) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2021-12-18 19:35:30,683 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 19 [2021-12-18 19:35:30,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:30,683 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2021-12-18 19:35:30,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:30,683 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2021-12-18 19:35:30,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-18 19:35:30,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:30,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:30,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:30,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-18 19:35:30,903 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:30,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:30,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1814130006, now seen corresponding path program 1 times [2021-12-18 19:35:30,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:30,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952242045] [2021-12-18 19:35:30,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:30,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:30,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:30,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952242045] [2021-12-18 19:35:30,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952242045] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:30,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788121389] [2021-12-18 19:35:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:30,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:30,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:30,976 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:31,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 19:35:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:31,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-18 19:35:31,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:31,076 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:35:31,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:35:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:31,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:31,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788121389] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:31,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:31,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2021-12-18 19:35:31,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395442228] [2021-12-18 19:35:31,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:31,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 19:35:31,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:31,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 19:35:31,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:35:31,293 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:31,399 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2021-12-18 19:35:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 19:35:31,399 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 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 [2021-12-18 19:35:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:31,400 INFO L225 Difference]: With dead ends: 91 [2021-12-18 19:35:31,400 INFO L226 Difference]: Without dead ends: 91 [2021-12-18 19:35:31,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-18 19:35:31,401 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 82 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:31,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 160 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-18 19:35:31,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-12-18 19:35:31,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2021-12-18 19:35:31,404 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 19 [2021-12-18 19:35:31,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:31,404 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2021-12-18 19:35:31,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,405 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2021-12-18 19:35:31,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 19:35:31,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:31,405 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] [2021-12-18 19:35:31,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:31,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:31,632 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:31,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1424522230, now seen corresponding path program 1 times [2021-12-18 19:35:31,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:31,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884015396] [2021-12-18 19:35:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:31,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:31,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:31,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884015396] [2021-12-18 19:35:31,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884015396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:31,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:31,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:31,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328137177] [2021-12-18 19:35:31,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:31,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:31,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:31,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:31,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:31,660 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:31,691 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2021-12-18 19:35:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:31,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-18 19:35:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:31,693 INFO L225 Difference]: With dead ends: 75 [2021-12-18 19:35:31,693 INFO L226 Difference]: Without dead ends: 75 [2021-12-18 19:35:31,693 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 [2021-12-18 19:35:31,694 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 66 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 [2021-12-18 19:35:31,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 66 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-18 19:35:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-18 19:35:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 74 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2021-12-18 19:35:31,697 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 20 [2021-12-18 19:35:31,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:31,697 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2021-12-18 19:35:31,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,697 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2021-12-18 19:35:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 19:35:31,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:31,698 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] [2021-12-18 19:35:31,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-18 19:35:31,698 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:31,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:31,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1424522231, now seen corresponding path program 1 times [2021-12-18 19:35:31,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:31,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542015745] [2021-12-18 19:35:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:31,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:31,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:31,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542015745] [2021-12-18 19:35:31,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542015745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:31,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:31,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 19:35:31,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65491208] [2021-12-18 19:35:31,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:31,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:35:31,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:31,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:35:31,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:35:31,752 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:31,812 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-12-18 19:35:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:35:31,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-18 19:35:31,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:31,813 INFO L225 Difference]: With dead ends: 81 [2021-12-18 19:35:31,813 INFO L226 Difference]: Without dead ends: 81 [2021-12-18 19:35:31,814 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 [2021-12-18 19:35:31,814 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 78 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 [2021-12-18 19:35:31,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 78 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:31,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-18 19:35:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2021-12-18 19:35:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 76 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2021-12-18 19:35:31,820 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 20 [2021-12-18 19:35:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:31,821 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2021-12-18 19:35:31,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,821 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2021-12-18 19:35:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 19:35:31,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:31,821 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] [2021-12-18 19:35:31,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-18 19:35:31,822 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:31,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:31,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1210516230, now seen corresponding path program 1 times [2021-12-18 19:35:31,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:31,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714744292] [2021-12-18 19:35:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:31,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:31,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:31,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714744292] [2021-12-18 19:35:31,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714744292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:31,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:31,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 19:35:31,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589925268] [2021-12-18 19:35:31,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:31,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 19:35:31,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:31,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 19:35:31,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 19:35:31,850 INFO L87 Difference]: Start difference. First operand 77 states and 89 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) [2021-12-18 19:35:31,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:31,876 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-12-18 19:35:31,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 19:35:31,877 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 [2021-12-18 19:35:31,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:31,877 INFO L225 Difference]: With dead ends: 76 [2021-12-18 19:35:31,877 INFO L226 Difference]: Without dead ends: 76 [2021-12-18 19:35:31,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:31,878 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 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 [2021-12-18 19:35:31,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:31,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-18 19:35:31,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-12-18 19:35:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2021-12-18 19:35:31,880 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 21 [2021-12-18 19:35:31,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:31,881 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2021-12-18 19:35:31,881 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) [2021-12-18 19:35:31,881 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2021-12-18 19:35:31,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 19:35:31,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:31,881 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] [2021-12-18 19:35:31,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-18 19:35:31,882 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:31,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:31,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1210516231, now seen corresponding path program 1 times [2021-12-18 19:35:31,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:31,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823852975] [2021-12-18 19:35:31,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:31,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:31,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:31,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823852975] [2021-12-18 19:35:31,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823852975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:31,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:31,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 19:35:31,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650146453] [2021-12-18 19:35:31,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:31,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 19:35:31,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:31,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 19:35:31,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-18 19:35:31,950 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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) [2021-12-18 19:35:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:32,002 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-12-18 19:35:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 19:35:32,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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 [2021-12-18 19:35:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:32,003 INFO L225 Difference]: With dead ends: 80 [2021-12-18 19:35:32,003 INFO L226 Difference]: Without dead ends: 80 [2021-12-18 19:35:32,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:35:32,004 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 68 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:32,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 71 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:32,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-18 19:35:32,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-12-18 19:35:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 78 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2021-12-18 19:35:32,016 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 21 [2021-12-18 19:35:32,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:32,016 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2021-12-18 19:35:32,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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) [2021-12-18 19:35:32,016 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2021-12-18 19:35:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 19:35:32,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:32,019 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:32,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-18 19:35:32,019 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:32,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash -377785809, now seen corresponding path program 2 times [2021-12-18 19:35:32,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:32,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163120383] [2021-12-18 19:35:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:32,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:35:32,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:32,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163120383] [2021-12-18 19:35:32,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163120383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:32,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:32,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 19:35:32,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560776546] [2021-12-18 19:35:32,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:32,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:35:32,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:32,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:35:32,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:35:32,118 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2021-12-18 19:35:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:32,234 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2021-12-18 19:35:32,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:35:32,235 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 [2021-12-18 19:35:32,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:32,235 INFO L225 Difference]: With dead ends: 102 [2021-12-18 19:35:32,235 INFO L226 Difference]: Without dead ends: 102 [2021-12-18 19:35:32,235 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 [2021-12-18 19:35:32,236 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 120 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:32,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 148 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:32,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-18 19:35:32,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2021-12-18 19:35:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 70 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2021-12-18 19:35:32,238 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 21 [2021-12-18 19:35:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:32,238 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2021-12-18 19:35:32,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2021-12-18 19:35:32,238 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2021-12-18 19:35:32,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 19:35:32,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:32,239 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:32,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-18 19:35:32,239 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:32,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:32,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1923036781, now seen corresponding path program 1 times [2021-12-18 19:35:32,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:32,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382450641] [2021-12-18 19:35:32,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:32,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:32,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:32,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382450641] [2021-12-18 19:35:32,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382450641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:32,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016307107] [2021-12-18 19:35:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:32,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:32,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:32,410 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:32,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 19:35:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:32,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-18 19:35:32,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:32,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:35:32,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:35:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:32,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:32,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-18 19:35:32,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 19:35:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:32,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016307107] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:32,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:32,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-12-18 19:35:32,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513018399] [2021-12-18 19:35:32,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:32,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 19:35:32,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:32,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 19:35:32,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-12-18 19:35:32,828 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:33,187 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2021-12-18 19:35:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:35:33,188 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-18 19:35:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:33,189 INFO L225 Difference]: With dead ends: 129 [2021-12-18 19:35:33,189 INFO L226 Difference]: Without dead ends: 129 [2021-12-18 19:35:33,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=344, Invalid=846, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:35:33,190 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 418 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:33,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 186 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:33,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-18 19:35:33,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 75. [2021-12-18 19:35:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 74 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2021-12-18 19:35:33,192 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 21 [2021-12-18 19:35:33,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:33,192 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2021-12-18 19:35:33,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:33,192 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2021-12-18 19:35:33,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-18 19:35:33,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:33,193 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] [2021-12-18 19:35:33,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:33,403 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,SelfDestructingSolverStorable24 [2021-12-18 19:35:33,404 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:33,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:33,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1943656895, now seen corresponding path program 1 times [2021-12-18 19:35:33,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:33,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596003532] [2021-12-18 19:35:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:33,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:33,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:33,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596003532] [2021-12-18 19:35:33,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596003532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:33,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:33,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 19:35:33,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111257622] [2021-12-18 19:35:33,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:33,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 19:35:33,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:33,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 19:35:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-18 19:35:33,494 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:33,571 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2021-12-18 19:35:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 19:35:33,572 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-18 19:35:33,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:33,573 INFO L225 Difference]: With dead ends: 126 [2021-12-18 19:35:33,573 INFO L226 Difference]: Without dead ends: 126 [2021-12-18 19:35:33,573 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 [2021-12-18 19:35:33,574 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:33,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 183 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-18 19:35:33,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2021-12-18 19:35:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.2155172413793103) internal successors, (141), 119 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:33,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2021-12-18 19:35:33,582 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 24 [2021-12-18 19:35:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:33,582 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2021-12-18 19:35:33,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:33,582 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2021-12-18 19:35:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-18 19:35:33,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:33,584 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] [2021-12-18 19:35:33,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-18 19:35:33,584 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:33,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2132455683, now seen corresponding path program 1 times [2021-12-18 19:35:33,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:33,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788857620] [2021-12-18 19:35:33,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:33,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:33,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:33,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788857620] [2021-12-18 19:35:33,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788857620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:33,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:33,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-18 19:35:33,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893315048] [2021-12-18 19:35:33,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:33,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-18 19:35:33,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:33,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-18 19:35:33,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-18 19:35:33,709 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:33,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:33,882 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2021-12-18 19:35:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:35:33,883 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-18 19:35:33,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:33,884 INFO L225 Difference]: With dead ends: 142 [2021-12-18 19:35:33,884 INFO L226 Difference]: Without dead ends: 142 [2021-12-18 19:35:33,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-12-18 19:35:33,884 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:33,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 185 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:33,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-18 19:35:33,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2021-12-18 19:35:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 107 states have (on average 1.2242990654205608) internal successors, (131), 110 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2021-12-18 19:35:33,887 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 24 [2021-12-18 19:35:33,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:33,887 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2021-12-18 19:35:33,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:33,887 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2021-12-18 19:35:33,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-18 19:35:33,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:33,887 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] [2021-12-18 19:35:33,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-18 19:35:33,888 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:33,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:33,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1709753857, now seen corresponding path program 1 times [2021-12-18 19:35:33,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:33,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296075977] [2021-12-18 19:35:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:33,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:34,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:34,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296075977] [2021-12-18 19:35:34,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296075977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:34,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:34,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 19:35:34,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015726078] [2021-12-18 19:35:34,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:34,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 19:35:34,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:34,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 19:35:34,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-18 19:35:34,006 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:34,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:34,169 INFO L93 Difference]: Finished difference Result 161 states and 187 transitions. [2021-12-18 19:35:34,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 19:35:34,169 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-18 19:35:34,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:34,170 INFO L225 Difference]: With dead ends: 161 [2021-12-18 19:35:34,170 INFO L226 Difference]: Without dead ends: 161 [2021-12-18 19:35:34,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-12-18 19:35:34,170 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 99 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:34,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 162 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:34,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-18 19:35:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 113. [2021-12-18 19:35:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.238532110091743) internal successors, (135), 112 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2021-12-18 19:35:34,173 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 24 [2021-12-18 19:35:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:34,173 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2021-12-18 19:35:34,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2021-12-18 19:35:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 19:35:34,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:34,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:34,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-18 19:35:34,175 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)] === [2021-12-18 19:35:34,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:34,175 INFO L85 PathProgramCache]: Analyzing trace with hash 123776973, now seen corresponding path program 1 times [2021-12-18 19:35:34,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:34,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627281953] [2021-12-18 19:35:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:34,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:34,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:34,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627281953] [2021-12-18 19:35:34,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627281953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 19:35:34,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 19:35:34,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 19:35:34,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310804364] [2021-12-18 19:35:34,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 19:35:34,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 19:35:34,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:34,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 19:35:34,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:34,240 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:34,263 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2021-12-18 19:35:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 19:35:34,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-18 19:35:34,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:34,264 INFO L225 Difference]: With dead ends: 114 [2021-12-18 19:35:34,264 INFO L226 Difference]: Without dead ends: 83 [2021-12-18 19:35:34,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 19:35:34,265 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:34,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 73 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 19:35:34,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-18 19:35:34,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-18 19:35:34,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 80 states have (on average 1.2) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2021-12-18 19:35:34,267 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 25 [2021-12-18 19:35:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:34,267 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2021-12-18 19:35:34,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2021-12-18 19:35:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 19:35:34,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:34,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:34,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-18 19:35:34,268 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:34,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2136240330, now seen corresponding path program 2 times [2021-12-18 19:35:34,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:34,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353913569] [2021-12-18 19:35:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:34,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:34,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:34,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353913569] [2021-12-18 19:35:34,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353913569] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:34,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138654050] [2021-12-18 19:35:34,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:35:34,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:34,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:34,351 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:34,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 19:35:34,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:35:34,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:34,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 19:35:34,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:34,455 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:35:34,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:35:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:34,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:34,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138654050] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:34,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:34,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2021-12-18 19:35:34,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055023554] [2021-12-18 19:35:34,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:34,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 19:35:34,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:34,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 19:35:34,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-12-18 19:35:34,856 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:35,185 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2021-12-18 19:35:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 19:35:35,185 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-18 19:35:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:35,186 INFO L225 Difference]: With dead ends: 122 [2021-12-18 19:35:35,186 INFO L226 Difference]: Without dead ends: 122 [2021-12-18 19:35:35,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:35:35,187 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 208 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:35,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 190 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:35:35,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-18 19:35:35,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2021-12-18 19:35:35,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 86 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) [2021-12-18 19:35:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2021-12-18 19:35:35,189 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 25 [2021-12-18 19:35:35,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:35,189 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2021-12-18 19:35:35,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:35,189 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2021-12-18 19:35:35,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 19:35:35,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:35,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:35,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:35,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:35,398 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:35,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:35,398 INFO L85 PathProgramCache]: Analyzing trace with hash -67455619, now seen corresponding path program 1 times [2021-12-18 19:35:35,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:35,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215350963] [2021-12-18 19:35:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:35,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:35,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:35,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215350963] [2021-12-18 19:35:35,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215350963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:35,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105448185] [2021-12-18 19:35:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:35,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:35,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:35,507 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:35,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 19:35:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:35,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-18 19:35:35,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:35,602 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:35:35,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:35:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:35,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:36,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105448185] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:36,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:36,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2021-12-18 19:35:36,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781328616] [2021-12-18 19:35:36,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:36,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 19:35:36,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:36,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 19:35:36,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-12-18 19:35:36,059 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 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) [2021-12-18 19:35:36,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:36,557 INFO L93 Difference]: Finished difference Result 125 states and 139 transitions. [2021-12-18 19:35:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:35:36,557 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 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 27 [2021-12-18 19:35:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:36,558 INFO L225 Difference]: With dead ends: 125 [2021-12-18 19:35:36,558 INFO L226 Difference]: Without dead ends: 119 [2021-12-18 19:35:36,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=319, Invalid=1013, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 19:35:36,559 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 233 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:36,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 175 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:35:36,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-18 19:35:36,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 103. [2021-12-18 19:35:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 100 states have (on average 1.19) internal successors, (119), 102 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2021-12-18 19:35:36,562 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 27 [2021-12-18 19:35:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:36,562 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2021-12-18 19:35:36,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 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) [2021-12-18 19:35:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2021-12-18 19:35:36,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-18 19:35:36,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:36,563 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:36,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-18 19:35:36,787 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,SelfDestructingSolverStorable30 [2021-12-18 19:35:36,787 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:36,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:36,787 INFO L85 PathProgramCache]: Analyzing trace with hash -67409757, now seen corresponding path program 3 times [2021-12-18 19:35:36,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:36,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037565332] [2021-12-18 19:35:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:36,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:37,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:37,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037565332] [2021-12-18 19:35:37,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037565332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:37,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291283120] [2021-12-18 19:35:37,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:35:37,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:37,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:37,154 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:37,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 19:35:37,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:35:37,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:37,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-18 19:35:37,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:37,341 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:35:37,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:35:37,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:35:37,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:35:37,797 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-12-18 19:35:37,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 18 [2021-12-18 19:35:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:37,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:37,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-18 19:35:37,967 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-18 19:35:37,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 39 [2021-12-18 19:35:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:38,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291283120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:38,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:38,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2021-12-18 19:35:38,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197837638] [2021-12-18 19:35:38,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:38,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 19:35:38,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:38,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 19:35:38,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 19:35:38,289 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 37 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:39,221 INFO L93 Difference]: Finished difference Result 166 states and 187 transitions. [2021-12-18 19:35:39,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 19:35:39,221 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 37 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-18 19:35:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:39,222 INFO L225 Difference]: With dead ends: 166 [2021-12-18 19:35:39,222 INFO L226 Difference]: Without dead ends: 156 [2021-12-18 19:35:39,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=475, Invalid=2387, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 19:35:39,225 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 247 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:39,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 264 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 248 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2021-12-18 19:35:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-18 19:35:39,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 116. [2021-12-18 19:35:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 115 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:39,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2021-12-18 19:35:39,232 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 27 [2021-12-18 19:35:39,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:39,232 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2021-12-18 19:35:39,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 37 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2021-12-18 19:35:39,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-18 19:35:39,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:39,233 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:39,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:39,456 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,SelfDestructingSolverStorable31 [2021-12-18 19:35:39,457 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:39,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:39,457 INFO L85 PathProgramCache]: Analyzing trace with hash -438004926, now seen corresponding path program 1 times [2021-12-18 19:35:39,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:39,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820515138] [2021-12-18 19:35:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:39,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:35:39,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:39,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820515138] [2021-12-18 19:35:39,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820515138] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:39,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683590999] [2021-12-18 19:35:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:39,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:39,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:39,519 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:39,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 19:35:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:39,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-18 19:35:39,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:35:39,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-18 19:35:39,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683590999] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:39,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:39,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2021-12-18 19:35:39,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226030991] [2021-12-18 19:35:39,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:39,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 19:35:39,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:39,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 19:35:39,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-18 19:35:39,822 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:39,947 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2021-12-18 19:35:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 19:35:39,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2021-12-18 19:35:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:39,948 INFO L225 Difference]: With dead ends: 123 [2021-12-18 19:35:39,948 INFO L226 Difference]: Without dead ends: 123 [2021-12-18 19:35:39,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:35:39,949 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 142 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:39,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 114 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:39,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-18 19:35:39,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 113. [2021-12-18 19:35:39,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 112 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:39,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2021-12-18 19:35:39,952 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 28 [2021-12-18 19:35:39,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:39,952 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2021-12-18 19:35:39,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:39,952 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2021-12-18 19:35:39,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 19:35:39,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:39,953 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:39,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:40,167 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,SelfDestructingSolverStorable32 [2021-12-18 19:35:40,167 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:40,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:40,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666176, now seen corresponding path program 4 times [2021-12-18 19:35:40,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:40,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870817546] [2021-12-18 19:35:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:40,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:40,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:40,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870817546] [2021-12-18 19:35:40,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870817546] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:40,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920478690] [2021-12-18 19:35:40,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:35:40,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:40,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:40,329 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:40,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 19:35:40,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:35:40,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:40,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-18 19:35:40,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:40,475 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:35:40,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:35:40,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:35:40,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:35:40,831 INFO L354 Elim1Store]: treesize reduction 6, result has 76.0 percent of original size [2021-12-18 19:35:40,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2021-12-18 19:35:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:35:41,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:41,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-18 19:35:41,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:41,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2021-12-18 19:35:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:35:41,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920478690] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:41,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:41,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2021-12-18 19:35:41,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381319120] [2021-12-18 19:35:41,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:41,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 19:35:41,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:41,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 19:35:41,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:35:41,705 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 31 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 31 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) [2021-12-18 19:35:42,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:42,534 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2021-12-18 19:35:42,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 19:35:42,535 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 31 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 31 [2021-12-18 19:35:42,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:42,535 INFO L225 Difference]: With dead ends: 153 [2021-12-18 19:35:42,535 INFO L226 Difference]: Without dead ends: 153 [2021-12-18 19:35:42,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 19:35:42,536 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 123 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:42,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 333 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 616 Invalid, 0 Unknown, 129 Unchecked, 0.3s Time] [2021-12-18 19:35:42,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-18 19:35:42,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2021-12-18 19:35:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 120 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 139 transitions. [2021-12-18 19:35:42,539 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 139 transitions. Word has length 31 [2021-12-18 19:35:42,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:42,540 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 139 transitions. [2021-12-18 19:35:42,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 31 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) [2021-12-18 19:35:42,540 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 139 transitions. [2021-12-18 19:35:42,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-18 19:35:42,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:42,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:42,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:42,741 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,SelfDestructingSolverStorable33 [2021-12-18 19:35:42,741 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:42,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:42,741 INFO L85 PathProgramCache]: Analyzing trace with hash -992295355, now seen corresponding path program 2 times [2021-12-18 19:35:42,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:42,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933641111] [2021-12-18 19:35:42,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:42,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:42,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:42,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933641111] [2021-12-18 19:35:42,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933641111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:42,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925891567] [2021-12-18 19:35:42,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:35:42,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:42,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:42,854 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:42,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 19:35:42,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:35:42,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:42,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-18 19:35:42,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:43,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:43,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:35:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:43,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925891567] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:43,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:43,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2021-12-18 19:35:43,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176551667] [2021-12-18 19:35:43,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:43,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 19:35:43,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:43,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 19:35:43,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-18 19:35:43,232 INFO L87 Difference]: Start difference. First operand 121 states and 139 transitions. Second operand has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:43,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:43,473 INFO L93 Difference]: Finished difference Result 140 states and 156 transitions. [2021-12-18 19:35:43,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 19:35:43,474 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 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 32 [2021-12-18 19:35:43,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:43,474 INFO L225 Difference]: With dead ends: 140 [2021-12-18 19:35:43,474 INFO L226 Difference]: Without dead ends: 140 [2021-12-18 19:35:43,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-12-18 19:35:43,475 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 143 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:43,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 214 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 19:35:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-18 19:35:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 129. [2021-12-18 19:35:43,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 128 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:43,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2021-12-18 19:35:43,477 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 32 [2021-12-18 19:35:43,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:43,478 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2021-12-18 19:35:43,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:43,478 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2021-12-18 19:35:43,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-18 19:35:43,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:43,479 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:43,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:43,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:43,691 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:43,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:43,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1626154062, now seen corresponding path program 5 times [2021-12-18 19:35:43,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:43,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157845913] [2021-12-18 19:35:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:43,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:43,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:43,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157845913] [2021-12-18 19:35:43,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157845913] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:43,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160187034] [2021-12-18 19:35:43,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:35:43,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:43,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:43,848 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:43,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 19:35:43,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-18 19:35:43,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:43,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 19:35:43,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:43,949 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:35:43,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:35:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:44,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:44,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160187034] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:44,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:44,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2021-12-18 19:35:44,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275490870] [2021-12-18 19:35:44,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:44,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 19:35:44,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:44,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 19:35:44,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:35:44,393 INFO L87 Difference]: Start difference. First operand 129 states and 146 transitions. Second operand has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:44,789 INFO L93 Difference]: Finished difference Result 251 states and 274 transitions. [2021-12-18 19:35:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 19:35:44,790 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-18 19:35:44,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:44,790 INFO L225 Difference]: With dead ends: 251 [2021-12-18 19:35:44,790 INFO L226 Difference]: Without dead ends: 238 [2021-12-18 19:35:44,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=488, Invalid=1404, Unknown=0, NotChecked=0, Total=1892 [2021-12-18 19:35:44,791 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 197 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:44,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 254 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:35:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-18 19:35:44,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 148. [2021-12-18 19:35:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.1655172413793105) internal successors, (169), 147 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2021-12-18 19:35:44,795 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 35 [2021-12-18 19:35:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:44,795 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2021-12-18 19:35:44,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2021-12-18 19:35:44,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 19:35:44,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:44,796 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, 1, 1, 1, 1] [2021-12-18 19:35:44,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-18 19:35:44,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:44,999 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:45,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:45,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1310569203, now seen corresponding path program 3 times [2021-12-18 19:35:45,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:45,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562202826] [2021-12-18 19:35:45,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:45,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:45,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:45,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562202826] [2021-12-18 19:35:45,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562202826] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:45,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324736950] [2021-12-18 19:35:45,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:35:45,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:45,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:45,341 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:45,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 19:35:45,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 19:35:45,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:45,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-18 19:35:45,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:45,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:35:45,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:35:45,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-18 19:35:45,895 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-18 19:35:45,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 40 [2021-12-18 19:35:45,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:35:45,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 19:35:46,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:35:46,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:46,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:46,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2021-12-18 19:35:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:46,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:46,099 WARN L838 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_cstrcat_#t~mem6#1| 0) (forall ((v_ArrVal_590 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_590) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0))) is different from false [2021-12-18 19:35:46,328 INFO L354 Elim1Store]: treesize reduction 23, result has 46.5 percent of original size [2021-12-18 19:35:46,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 73 [2021-12-18 19:35:46,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:46,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:46,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:46,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2021-12-18 19:35:46,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:35:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2021-12-18 19:35:46,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324736950] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:46,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:46,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2021-12-18 19:35:46,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941795862] [2021-12-18 19:35:46,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:46,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-18 19:35:46,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:46,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-18 19:35:46,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1188, Unknown=8, NotChecked=70, Total=1406 [2021-12-18 19:35:46,691 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:47,131 INFO L93 Difference]: Finished difference Result 224 states and 253 transitions. [2021-12-18 19:35:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 19:35:47,131 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-18 19:35:47,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:47,132 INFO L225 Difference]: With dead ends: 224 [2021-12-18 19:35:47,132 INFO L226 Difference]: Without dead ends: 195 [2021-12-18 19:35:47,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=219, Invalid=1757, Unknown=8, NotChecked=86, Total=2070 [2021-12-18 19:35:47,133 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:47,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 344 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 190 Invalid, 0 Unknown, 120 Unchecked, 0.1s Time] [2021-12-18 19:35:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-18 19:35:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 189. [2021-12-18 19:35:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 186 states have (on average 1.1505376344086022) internal successors, (214), 188 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 214 transitions. [2021-12-18 19:35:47,137 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 214 transitions. Word has length 36 [2021-12-18 19:35:47,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:47,137 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 214 transitions. [2021-12-18 19:35:47,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 214 transitions. [2021-12-18 19:35:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-18 19:35:47,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:47,138 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] [2021-12-18 19:35:47,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:47,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-18 19:35:47,360 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:47,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:47,360 INFO L85 PathProgramCache]: Analyzing trace with hash -361405806, now seen corresponding path program 1 times [2021-12-18 19:35:47,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:47,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907708286] [2021-12-18 19:35:47,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:47,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:35:47,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:47,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907708286] [2021-12-18 19:35:47,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907708286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:47,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888898346] [2021-12-18 19:35:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:47,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:47,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:47,602 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:47,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 19:35:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:47,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-18 19:35:47,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:47,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:35:48,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:48,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:48,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 19:35:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:35:48,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:48,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-18 19:35:48,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 19:35:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:35:48,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888898346] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:48,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:48,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2021-12-18 19:35:48,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184511946] [2021-12-18 19:35:48,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:48,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 19:35:48,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:48,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 19:35:48,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-12-18 19:35:48,491 INFO L87 Difference]: Start difference. First operand 189 states and 214 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:49,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:49,468 INFO L93 Difference]: Finished difference Result 238 states and 266 transitions. [2021-12-18 19:35:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 19:35:49,469 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 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 38 [2021-12-18 19:35:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:49,470 INFO L225 Difference]: With dead ends: 238 [2021-12-18 19:35:49,470 INFO L226 Difference]: Without dead ends: 225 [2021-12-18 19:35:49,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=431, Invalid=2431, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 19:35:49,471 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 159 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:49,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 376 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 584 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2021-12-18 19:35:49,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-12-18 19:35:49,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 199. [2021-12-18 19:35:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 196 states have (on average 1.1581632653061225) internal successors, (227), 198 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 227 transitions. [2021-12-18 19:35:49,476 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 227 transitions. Word has length 38 [2021-12-18 19:35:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:49,477 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 227 transitions. [2021-12-18 19:35:49,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 227 transitions. [2021-12-18 19:35:49,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-18 19:35:49,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:49,478 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:49,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:49,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-18 19:35:49,680 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:49,681 INFO L85 PathProgramCache]: Analyzing trace with hash 634400591, now seen corresponding path program 6 times [2021-12-18 19:35:49,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:49,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358028801] [2021-12-18 19:35:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:49,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:50,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:50,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358028801] [2021-12-18 19:35:50,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358028801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:50,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947297593] [2021-12-18 19:35:50,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:35:50,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:50,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:50,251 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:50,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 19:35:50,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-18 19:35:50,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:50,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-18 19:35:50,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:50,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:35:50,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:50,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 19 [2021-12-18 19:35:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:50,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:51,078 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 59 treesize of output 51 [2021-12-18 19:35:51,082 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-12-18 19:35:51,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 81 [2021-12-18 19:35:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:51,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947297593] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:51,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:51,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 44 [2021-12-18 19:35:51,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730134479] [2021-12-18 19:35:51,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:51,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 19:35:51,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:51,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 19:35:51,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1662, Unknown=0, NotChecked=0, Total=1892 [2021-12-18 19:35:51,610 INFO L87 Difference]: Start difference. First operand 199 states and 227 transitions. Second operand has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:55,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:55,341 INFO L93 Difference]: Finished difference Result 393 states and 434 transitions. [2021-12-18 19:35:55,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-18 19:35:55,341 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-18 19:35:55,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:55,342 INFO L225 Difference]: With dead ends: 393 [2021-12-18 19:35:55,342 INFO L226 Difference]: Without dead ends: 382 [2021-12-18 19:35:55,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1867 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1650, Invalid=6540, Unknown=0, NotChecked=0, Total=8190 [2021-12-18 19:35:55,344 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 524 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:55,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 381 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:35:55,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-18 19:35:55,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 211. [2021-12-18 19:35:55,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 208 states have (on average 1.1586538461538463) internal successors, (241), 210 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 241 transitions. [2021-12-18 19:35:55,351 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 241 transitions. Word has length 39 [2021-12-18 19:35:55,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:55,351 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 241 transitions. [2021-12-18 19:35:55,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:55,351 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 241 transitions. [2021-12-18 19:35:55,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-18 19:35:55,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:55,352 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:55,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:55,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-18 19:35:55,563 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:55,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:55,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1413686832, now seen corresponding path program 4 times [2021-12-18 19:35:55,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:55,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682593401] [2021-12-18 19:35:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:55,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 19:35:55,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:55,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682593401] [2021-12-18 19:35:55,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682593401] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:55,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542119424] [2021-12-18 19:35:55,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:35:55,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:55,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:55,639 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:55,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 19:35:55,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:35:55,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:35:55,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 19:35:55,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:55,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:35:55,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:35:56,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:35:56,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:35:56,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:35:56,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:56,512 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 [2021-12-18 19:35:56,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:56,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:56,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:56,772 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 [2021-12-18 19:35:56,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:35:56,779 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 [2021-12-18 19:35:56,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-18 19:35:57,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:35:57,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:35:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:35:57,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542119424] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:57,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:57,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 30 [2021-12-18 19:35:57,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407468267] [2021-12-18 19:35:57,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:57,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 19:35:57,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:57,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 19:35:57,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=763, Unknown=1, NotChecked=0, Total=870 [2021-12-18 19:35:57,344 INFO L87 Difference]: Start difference. First operand 211 states and 241 transitions. Second operand has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:58,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:58,108 INFO L93 Difference]: Finished difference Result 221 states and 247 transitions. [2021-12-18 19:35:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 19:35:58,108 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-18 19:35:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:58,109 INFO L225 Difference]: With dead ends: 221 [2021-12-18 19:35:58,109 INFO L226 Difference]: Without dead ends: 221 [2021-12-18 19:35:58,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=446, Invalid=2309, Unknown=1, NotChecked=0, Total=2756 [2021-12-18 19:35:58,111 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 273 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:58,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 316 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 452 Invalid, 0 Unknown, 191 Unchecked, 0.2s Time] [2021-12-18 19:35:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-18 19:35:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 215. [2021-12-18 19:35:58,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 212 states have (on average 1.150943396226415) internal successors, (244), 214 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:58,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 244 transitions. [2021-12-18 19:35:58,115 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 244 transitions. Word has length 40 [2021-12-18 19:35:58,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:58,115 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 244 transitions. [2021-12-18 19:35:58,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:58,115 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 244 transitions. [2021-12-18 19:35:58,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-18 19:35:58,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:58,116 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:58,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:58,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-18 19:35:58,331 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:58,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:58,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2078988342, now seen corresponding path program 1 times [2021-12-18 19:35:58,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:58,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583275840] [2021-12-18 19:35:58,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:58,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:58,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583275840] [2021-12-18 19:35:58,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583275840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589704310] [2021-12-18 19:35:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:58,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:58,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:58,462 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:58,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 19:35:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:58,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-18 19:35:58,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:35:58,565 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:35:58,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:35:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:58,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:35:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:35:59,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589704310] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:35:59,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:35:59,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2021-12-18 19:35:59,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007152239] [2021-12-18 19:35:59,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:35:59,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 19:35:59,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:35:59,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 19:35:59,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 19:35:59,165 INFO L87 Difference]: Start difference. First operand 215 states and 244 transitions. Second operand has 34 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 34 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:59,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:35:59,521 INFO L93 Difference]: Finished difference Result 243 states and 270 transitions. [2021-12-18 19:35:59,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 19:35:59,521 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 34 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-18 19:35:59,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:35:59,522 INFO L225 Difference]: With dead ends: 243 [2021-12-18 19:35:59,522 INFO L226 Difference]: Without dead ends: 236 [2021-12-18 19:35:59,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1572, Unknown=0, NotChecked=0, Total=1980 [2021-12-18 19:35:59,523 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 259 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:35:59,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 280 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:35:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-18 19:35:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 225. [2021-12-18 19:35:59,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 222 states have (on average 1.1396396396396395) internal successors, (253), 224 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 253 transitions. [2021-12-18 19:35:59,527 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 253 transitions. Word has length 41 [2021-12-18 19:35:59,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:35:59,528 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 253 transitions. [2021-12-18 19:35:59,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 34 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:35:59,528 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 253 transitions. [2021-12-18 19:35:59,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-18 19:35:59,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:35:59,529 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:35:59,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 19:35:59,739 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,SelfDestructingSolverStorable40 [2021-12-18 19:35:59,739 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:35:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:35:59,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1605342100, now seen corresponding path program 7 times [2021-12-18 19:35:59,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:35:59,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633185367] [2021-12-18 19:35:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:35:59,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:35:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:35:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:35:59,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:35:59,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633185367] [2021-12-18 19:35:59,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633185367] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:35:59,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233954077] [2021-12-18 19:35:59,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:35:59,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:35:59,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:35:59,911 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:35:59,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 19:36:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:00,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 19:36:00,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:00,032 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:36:00,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:36:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:00,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 45 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:01,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233954077] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:01,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:01,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 41 [2021-12-18 19:36:01,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641348293] [2021-12-18 19:36:01,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:01,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-18 19:36:01,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:01,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-18 19:36:01,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2021-12-18 19:36:01,122 INFO L87 Difference]: Start difference. First operand 225 states and 253 transitions. Second operand has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 42 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:02,307 INFO L93 Difference]: Finished difference Result 401 states and 440 transitions. [2021-12-18 19:36:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-18 19:36:02,307 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 42 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-18 19:36:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:02,309 INFO L225 Difference]: With dead ends: 401 [2021-12-18 19:36:02,309 INFO L226 Difference]: Without dead ends: 401 [2021-12-18 19:36:02,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=631, Invalid=2561, Unknown=0, NotChecked=0, Total=3192 [2021-12-18 19:36:02,310 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 311 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:02,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 366 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:36:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-12-18 19:36:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 231. [2021-12-18 19:36:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 228 states have (on average 1.144736842105263) internal successors, (261), 230 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 261 transitions. [2021-12-18 19:36:02,314 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 261 transitions. Word has length 43 [2021-12-18 19:36:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:02,315 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 261 transitions. [2021-12-18 19:36:02,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.902439024390244) internal successors, (119), 42 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:02,315 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 261 transitions. [2021-12-18 19:36:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-18 19:36:02,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:02,336 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:02,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:02,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:02,551 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:02,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1392056413, now seen corresponding path program 2 times [2021-12-18 19:36:02,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:02,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52736068] [2021-12-18 19:36:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:02,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-18 19:36:02,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:02,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52736068] [2021-12-18 19:36:02,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52736068] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:02,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625650502] [2021-12-18 19:36:02,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:36:02,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:02,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:02,916 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:02,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 19:36:03,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:36:03,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:03,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 19:36:03,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:03,050 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:36:03,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:36:03,424 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 13 treesize of output 9 [2021-12-18 19:36:03,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:03,581 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-12-18 19:36:03,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 25 [2021-12-18 19:36:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 19:36:03,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:03,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-18 19:36:03,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:03,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2021-12-18 19:36:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 19:36:04,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625650502] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:04,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:04,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2021-12-18 19:36:04,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219123592] [2021-12-18 19:36:04,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:04,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 19:36:04,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:04,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 19:36:04,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1671, Unknown=0, NotChecked=0, Total=1892 [2021-12-18 19:36:04,424 INFO L87 Difference]: Start difference. First operand 231 states and 261 transitions. Second operand has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:05,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:05,458 INFO L93 Difference]: Finished difference Result 285 states and 317 transitions. [2021-12-18 19:36:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 19:36:05,459 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-18 19:36:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:05,460 INFO L225 Difference]: With dead ends: 285 [2021-12-18 19:36:05,460 INFO L226 Difference]: Without dead ends: 278 [2021-12-18 19:36:05,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=663, Invalid=3243, Unknown=0, NotChecked=0, Total=3906 [2021-12-18 19:36:05,463 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 310 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:05,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 199 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 473 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2021-12-18 19:36:05,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-18 19:36:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 238. [2021-12-18 19:36:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 235 states have (on average 1.1404255319148937) internal successors, (268), 237 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:05,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 268 transitions. [2021-12-18 19:36:05,468 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 268 transitions. Word has length 43 [2021-12-18 19:36:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:05,470 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 268 transitions. [2021-12-18 19:36:05,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 268 transitions. [2021-12-18 19:36:05,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 19:36:05,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:05,471 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:05,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:05,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:05,687 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:05,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:05,687 INFO L85 PathProgramCache]: Analyzing trace with hash -701284269, now seen corresponding path program 5 times [2021-12-18 19:36:05,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:05,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717065199] [2021-12-18 19:36:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:05,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:05,812 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:05,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:05,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717065199] [2021-12-18 19:36:05,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717065199] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:05,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692778828] [2021-12-18 19:36:05,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:36:05,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:05,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:05,814 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:05,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 19:36:05,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-18 19:36:05,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:05,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 19:36:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:06,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:06,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:36:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:36:06,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692778828] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:06,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:06,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-12-18 19:36:06,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264707215] [2021-12-18 19:36:06,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:06,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 19:36:06,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:06,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 19:36:06,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-12-18 19:36:06,328 INFO L87 Difference]: Start difference. First operand 238 states and 268 transitions. Second operand has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:06,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:06,644 INFO L93 Difference]: Finished difference Result 255 states and 281 transitions. [2021-12-18 19:36:06,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-18 19:36:06,645 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-18 19:36:06,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:06,645 INFO L225 Difference]: With dead ends: 255 [2021-12-18 19:36:06,645 INFO L226 Difference]: Without dead ends: 255 [2021-12-18 19:36:06,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 19:36:06,648 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 154 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:06,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 373 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:36:06,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-18 19:36:06,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 247. [2021-12-18 19:36:06,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 244 states have (on average 1.1352459016393444) internal successors, (277), 246 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:06,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 277 transitions. [2021-12-18 19:36:06,651 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 277 transitions. Word has length 44 [2021-12-18 19:36:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:06,652 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 277 transitions. [2021-12-18 19:36:06,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 277 transitions. [2021-12-18 19:36:06,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-18 19:36:06,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:06,653 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:06,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-18 19:36:06,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:06,859 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:06,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:06,860 INFO L85 PathProgramCache]: Analyzing trace with hash -840498235, now seen corresponding path program 8 times [2021-12-18 19:36:06,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:06,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565175535] [2021-12-18 19:36:06,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:06,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:36:07,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:07,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565175535] [2021-12-18 19:36:07,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565175535] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:07,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504332844] [2021-12-18 19:36:07,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:36:07,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:07,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:07,663 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:07,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 19:36:07,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:36:07,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:07,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-18 19:36:07,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:08,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:36:08,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:08,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 23 [2021-12-18 19:36:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:36:08,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:08,805 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 74 treesize of output 64 [2021-12-18 19:36:08,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:08,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:08,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:08,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:08,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:08,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:08,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:08,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:08,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:08,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:08,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2021-12-18 19:36:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:36:09,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504332844] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:09,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:09,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 49 [2021-12-18 19:36:09,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644602479] [2021-12-18 19:36:09,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:09,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 19:36:09,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:09,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 19:36:09,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2060, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 19:36:09,622 INFO L87 Difference]: Start difference. First operand 247 states and 277 transitions. Second operand has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 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) [2021-12-18 19:36:13,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:13,185 INFO L93 Difference]: Finished difference Result 480 states and 525 transitions. [2021-12-18 19:36:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-18 19:36:13,186 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 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 45 [2021-12-18 19:36:13,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:13,187 INFO L225 Difference]: With dead ends: 480 [2021-12-18 19:36:13,187 INFO L226 Difference]: Without dead ends: 467 [2021-12-18 19:36:13,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 56 SyntacticMatches, 8 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2384 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1764, Invalid=7356, Unknown=0, NotChecked=0, Total=9120 [2021-12-18 19:36:13,189 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 516 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:13,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 270 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:36:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-18 19:36:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 281. [2021-12-18 19:36:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 278 states have (on average 1.143884892086331) internal successors, (318), 280 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2021-12-18 19:36:13,195 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 45 [2021-12-18 19:36:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:13,195 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2021-12-18 19:36:13,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.163265306122449) internal successors, (106), 49 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) [2021-12-18 19:36:13,195 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2021-12-18 19:36:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-18 19:36:13,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:13,196 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:13,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:13,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:13,415 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:13,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:13,416 INFO L85 PathProgramCache]: Analyzing trace with hash 800775488, now seen corresponding path program 3 times [2021-12-18 19:36:13,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:13,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354349558] [2021-12-18 19:36:13,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:13,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:36:13,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:13,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354349558] [2021-12-18 19:36:13,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354349558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:13,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220940255] [2021-12-18 19:36:13,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:36:13,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:13,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:13,609 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:13,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 19:36:13,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 19:36:13,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:13,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 19:36:13,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:13,770 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:36:13,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:36:13,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:36:17,207 INFO L354 Elim1Store]: treesize reduction 2, result has 93.5 percent of original size [2021-12-18 19:36:17,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2021-12-18 19:36:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 15 refuted. 1 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:17,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:18,019 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 27 treesize of output 23 [2021-12-18 19:36:18,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:18,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2021-12-18 19:36:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:18,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220940255] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:18,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:18,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2021-12-18 19:36:18,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560401314] [2021-12-18 19:36:18,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:18,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 19:36:18,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:18,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 19:36:18,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1327, Unknown=1, NotChecked=0, Total=1482 [2021-12-18 19:36:18,583 INFO L87 Difference]: Start difference. First operand 281 states and 318 transitions. Second operand has 39 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 39 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:20,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:20,215 INFO L93 Difference]: Finished difference Result 343 states and 381 transitions. [2021-12-18 19:36:20,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-18 19:36:20,216 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 39 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 47 [2021-12-18 19:36:20,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:20,217 INFO L225 Difference]: With dead ends: 343 [2021-12-18 19:36:20,217 INFO L226 Difference]: Without dead ends: 305 [2021-12-18 19:36:20,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=579, Invalid=4676, Unknown=1, NotChecked=0, Total=5256 [2021-12-18 19:36:20,217 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 121 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:20,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 506 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1177 Invalid, 0 Unknown, 266 Unchecked, 0.5s Time] [2021-12-18 19:36:20,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-18 19:36:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 259. [2021-12-18 19:36:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 256 states have (on average 1.13671875) internal successors, (291), 258 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 291 transitions. [2021-12-18 19:36:20,223 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 291 transitions. Word has length 47 [2021-12-18 19:36:20,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:20,224 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 291 transitions. [2021-12-18 19:36:20,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 39 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:20,225 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 291 transitions. [2021-12-18 19:36:20,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 19:36:20,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:20,225 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:20,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-18 19:36:20,448 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,SelfDestructingSolverStorable45 [2021-12-18 19:36:20,449 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:20,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:20,449 INFO L85 PathProgramCache]: Analyzing trace with hash 255004699, now seen corresponding path program 6 times [2021-12-18 19:36:20,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:20,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420959347] [2021-12-18 19:36:20,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:20,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:21,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:21,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420959347] [2021-12-18 19:36:21,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420959347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:21,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199795080] [2021-12-18 19:36:21,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:36:21,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:21,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:21,074 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:21,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 19:36:21,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-18 19:36:21,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:21,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-18 19:36:21,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:21,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:36:21,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:36:21,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:36:21,681 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 17 treesize of output 19 [2021-12-18 19:36:21,735 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 [2021-12-18 19:36:21,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:36:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:21,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:21,774 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1027 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1027) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2021-12-18 19:36:21,780 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1027 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1027) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:36:21,786 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1027 (Array Int Int)) (v_ArrVal_1026 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1026) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1027) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:36:21,792 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1027 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1027) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:36:21,799 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1027 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1027) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)) is different from false [2021-12-18 19:36:21,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:21,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:36:21,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:21,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:36:21,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:36:22,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:36:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 11 not checked. [2021-12-18 19:36:22,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199795080] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:22,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:22,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 47 [2021-12-18 19:36:22,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649279487] [2021-12-18 19:36:22,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:22,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-18 19:36:22,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:22,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-18 19:36:22,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1571, Unknown=5, NotChecked=420, Total=2162 [2021-12-18 19:36:22,250 INFO L87 Difference]: Start difference. First operand 259 states and 291 transitions. Second operand has 47 states, 47 states have (on average 2.5319148936170213) internal successors, (119), 47 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:23,378 INFO L93 Difference]: Finished difference Result 283 states and 315 transitions. [2021-12-18 19:36:23,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 19:36:23,379 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.5319148936170213) internal successors, (119), 47 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-18 19:36:23,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:23,380 INFO L225 Difference]: With dead ends: 283 [2021-12-18 19:36:23,380 INFO L226 Difference]: Without dead ends: 266 [2021-12-18 19:36:23,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=417, Invalid=3136, Unknown=7, NotChecked=600, Total=4160 [2021-12-18 19:36:23,381 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 183 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:23,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 419 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 510 Invalid, 0 Unknown, 265 Unchecked, 0.2s Time] [2021-12-18 19:36:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-18 19:36:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 263. [2021-12-18 19:36:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 260 states have (on average 1.1307692307692307) internal successors, (294), 262 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:23,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 294 transitions. [2021-12-18 19:36:23,384 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 294 transitions. Word has length 48 [2021-12-18 19:36:23,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:23,385 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 294 transitions. [2021-12-18 19:36:23,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.5319148936170213) internal successors, (119), 47 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:23,385 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 294 transitions. [2021-12-18 19:36:23,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 19:36:23,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:23,386 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:23,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:23,607 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,SelfDestructingSolverStorable46 [2021-12-18 19:36:23,607 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:23,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1117402914, now seen corresponding path program 9 times [2021-12-18 19:36:23,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:23,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895722504] [2021-12-18 19:36:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:23,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:23,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:23,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895722504] [2021-12-18 19:36:23,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895722504] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:23,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536668961] [2021-12-18 19:36:23,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:36:23,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:23,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:23,814 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:23,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 19:36:23,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-18 19:36:23,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:23,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 19:36:23,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:23,945 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:36:23,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:36:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:24,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 66 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:24,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536668961] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:24,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:24,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 48 [2021-12-18 19:36:24,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086663750] [2021-12-18 19:36:24,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:24,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 19:36:24,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:24,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 19:36:24,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2034, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 19:36:24,964 INFO L87 Difference]: Start difference. First operand 263 states and 294 transitions. Second operand has 49 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:25,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:25,847 INFO L93 Difference]: Finished difference Result 432 states and 470 transitions. [2021-12-18 19:36:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 19:36:25,848 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-18 19:36:25,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:25,849 INFO L225 Difference]: With dead ends: 432 [2021-12-18 19:36:25,849 INFO L226 Difference]: Without dead ends: 432 [2021-12-18 19:36:25,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=941, Invalid=3615, Unknown=0, NotChecked=0, Total=4556 [2021-12-18 19:36:25,850 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 420 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:25,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 343 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 19:36:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-12-18 19:36:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 269. [2021-12-18 19:36:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 266 states have (on average 1.1353383458646618) internal successors, (302), 268 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 302 transitions. [2021-12-18 19:36:25,855 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 302 transitions. Word has length 49 [2021-12-18 19:36:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:25,856 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 302 transitions. [2021-12-18 19:36:25,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 49 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 302 transitions. [2021-12-18 19:36:25,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-18 19:36:25,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:25,857 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:25,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:26,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-18 19:36:26,080 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:26,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1859699616, now seen corresponding path program 2 times [2021-12-18 19:36:26,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:26,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783496504] [2021-12-18 19:36:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:26,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 19:36:26,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:26,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783496504] [2021-12-18 19:36:26,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783496504] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:26,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063065682] [2021-12-18 19:36:26,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:36:26,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:26,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:26,368 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:26,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 19:36:26,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:36:26,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:26,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 19:36:26,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:26,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:36:26,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:26,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:26,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 19:36:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 19:36:26,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:26,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-18 19:36:26,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 19:36:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-18 19:36:27,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063065682] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:27,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:27,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2021-12-18 19:36:27,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948957100] [2021-12-18 19:36:27,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:27,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 19:36:27,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:27,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 19:36:27,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 19:36:27,374 INFO L87 Difference]: Start difference. First operand 269 states and 302 transitions. Second operand has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:27,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:27,997 INFO L93 Difference]: Finished difference Result 272 states and 304 transitions. [2021-12-18 19:36:27,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:36:27,997 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-18 19:36:27,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:27,998 INFO L225 Difference]: With dead ends: 272 [2021-12-18 19:36:27,998 INFO L226 Difference]: Without dead ends: 267 [2021-12-18 19:36:27,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=464, Invalid=1792, Unknown=0, NotChecked=0, Total=2256 [2021-12-18 19:36:27,998 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 192 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:27,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 278 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 354 Invalid, 0 Unknown, 110 Unchecked, 0.2s Time] [2021-12-18 19:36:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-12-18 19:36:28,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2021-12-18 19:36:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 261 states have (on average 1.1340996168582376) internal successors, (296), 263 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 296 transitions. [2021-12-18 19:36:28,002 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 296 transitions. Word has length 50 [2021-12-18 19:36:28,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:28,002 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 296 transitions. [2021-12-18 19:36:28,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 34 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:28,002 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 296 transitions. [2021-12-18 19:36:28,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 19:36:28,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:28,003 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:28,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-18 19:36:28,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:28,215 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:28,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:28,216 INFO L85 PathProgramCache]: Analyzing trace with hash 82376955, now seen corresponding path program 10 times [2021-12-18 19:36:28,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:28,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338902320] [2021-12-18 19:36:28,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:28,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 38 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:36:29,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:29,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338902320] [2021-12-18 19:36:29,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338902320] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:29,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644631111] [2021-12-18 19:36:29,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:36:29,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:29,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:29,138 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:29,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-18 19:36:29,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:36:29,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:29,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-18 19:36:29,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:29,298 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:36:29,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:36:29,826 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 13 treesize of output 9 [2021-12-18 19:36:30,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:30,756 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-12-18 19:36:30,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 1 [2021-12-18 19:36:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 49 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:30,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:31,568 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 104 treesize of output 90 [2021-12-18 19:36:31,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:31,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 144 [2021-12-18 19:36:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 43 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:32,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644631111] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:32,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:32,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 28] total 77 [2021-12-18 19:36:32,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227429883] [2021-12-18 19:36:32,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:32,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-18 19:36:32,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:32,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-18 19:36:32,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=5308, Unknown=0, NotChecked=0, Total=5852 [2021-12-18 19:36:32,482 INFO L87 Difference]: Start difference. First operand 264 states and 296 transitions. Second operand has 77 states, 77 states have (on average 1.8831168831168832) internal successors, (145), 77 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:37,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:37,338 INFO L93 Difference]: Finished difference Result 481 states and 528 transitions. [2021-12-18 19:36:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-18 19:36:37,339 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.8831168831168832) internal successors, (145), 77 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-18 19:36:37,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:37,340 INFO L225 Difference]: With dead ends: 481 [2021-12-18 19:36:37,340 INFO L226 Difference]: Without dead ends: 460 [2021-12-18 19:36:37,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5571 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2416, Invalid=16766, Unknown=0, NotChecked=0, Total=19182 [2021-12-18 19:36:37,344 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 658 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:37,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 365 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 777 Invalid, 0 Unknown, 463 Unchecked, 0.4s Time] [2021-12-18 19:36:37,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-18 19:36:37,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 306. [2021-12-18 19:36:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 303 states have (on average 1.1386138613861385) internal successors, (345), 305 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:37,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 345 transitions. [2021-12-18 19:36:37,348 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 345 transitions. Word has length 51 [2021-12-18 19:36:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:37,349 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 345 transitions. [2021-12-18 19:36:37,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.8831168831168832) internal successors, (145), 77 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:37,349 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 345 transitions. [2021-12-18 19:36:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-18 19:36:37,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:37,350 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:37,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-18 19:36:37,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-18 19:36:37,573 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:37,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:37,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2031598690, now seen corresponding path program 7 times [2021-12-18 19:36:37,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:37,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128255219] [2021-12-18 19:36:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:37,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:36:38,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:38,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128255219] [2021-12-18 19:36:38,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128255219] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:38,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533458191] [2021-12-18 19:36:38,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:36:38,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:38,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:38,168 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:38,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-18 19:36:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:38,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-18 19:36:38,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:38,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:36:38,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:36:38,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:36:38,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:36:38,693 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 [2021-12-18 19:36:38,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:36:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:38,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:38,731 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1230 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1230) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2021-12-18 19:36:38,736 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1230 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1230) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:36:38,742 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1229 (Array Int Int)) (v_ArrVal_1230 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1229) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1230) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:36:38,747 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1230 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1230) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:36:38,755 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1230 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1230) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0)) is different from false [2021-12-18 19:36:38,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:38,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:36:38,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:38,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:36:38,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:36:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 11 not checked. [2021-12-18 19:36:39,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533458191] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:39,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:39,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15, 15] total 38 [2021-12-18 19:36:39,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753441984] [2021-12-18 19:36:39,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:39,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-18 19:36:39,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:39,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-18 19:36:39,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=973, Unknown=5, NotChecked=330, Total=1406 [2021-12-18 19:36:39,014 INFO L87 Difference]: Start difference. First operand 306 states and 345 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:39,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:39,817 INFO L93 Difference]: Finished difference Result 477 states and 538 transitions. [2021-12-18 19:36:39,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 19:36:39,817 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-18 19:36:39,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:39,818 INFO L225 Difference]: With dead ends: 477 [2021-12-18 19:36:39,818 INFO L226 Difference]: Without dead ends: 419 [2021-12-18 19:36:39,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=214, Invalid=2056, Unknown=6, NotChecked=480, Total=2756 [2021-12-18 19:36:39,819 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 144 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 434 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:39,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 807 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 759 Invalid, 0 Unknown, 434 Unchecked, 0.3s Time] [2021-12-18 19:36:39,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-18 19:36:39,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 401. [2021-12-18 19:36:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 398 states have (on average 1.1306532663316582) internal successors, (450), 400 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 450 transitions. [2021-12-18 19:36:39,824 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 450 transitions. Word has length 52 [2021-12-18 19:36:39,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:39,824 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 450 transitions. [2021-12-18 19:36:39,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:39,824 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 450 transitions. [2021-12-18 19:36:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 19:36:39,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:39,825 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:39,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-18 19:36:40,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-12-18 19:36:40,035 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash -53644648, now seen corresponding path program 11 times [2021-12-18 19:36:40,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:40,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173707344] [2021-12-18 19:36:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:40,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:40,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:40,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173707344] [2021-12-18 19:36:40,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173707344] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:40,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727904013] [2021-12-18 19:36:40,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:36:40,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:40,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:40,304 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:40,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-18 19:36:40,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-18 19:36:40,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:40,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 19:36:40,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:40,457 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:36:40,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:36:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:40,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 91 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:36:41,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727904013] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:41,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:41,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2021-12-18 19:36:41,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674924221] [2021-12-18 19:36:41,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:41,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-18 19:36:41,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:41,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-18 19:36:41,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=2272, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 19:36:41,505 INFO L87 Difference]: Start difference. First operand 401 states and 450 transitions. Second operand has 52 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 52 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:42,268 INFO L93 Difference]: Finished difference Result 677 states and 741 transitions. [2021-12-18 19:36:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 19:36:42,268 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 52 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-18 19:36:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:42,269 INFO L225 Difference]: With dead ends: 677 [2021-12-18 19:36:42,269 INFO L226 Difference]: Without dead ends: 677 [2021-12-18 19:36:42,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=3519, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 19:36:42,270 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 417 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:42,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 557 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:36:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-12-18 19:36:42,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 409. [2021-12-18 19:36:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 406 states have (on average 1.1354679802955665) internal successors, (461), 408 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 461 transitions. [2021-12-18 19:36:42,277 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 461 transitions. Word has length 55 [2021-12-18 19:36:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:42,277 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 461 transitions. [2021-12-18 19:36:42,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 52 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:42,278 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 461 transitions. [2021-12-18 19:36:42,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-18 19:36:42,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:42,278 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:42,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-18 19:36:42,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:42,502 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:42,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:42,502 INFO L85 PathProgramCache]: Analyzing trace with hash -477173151, now seen corresponding path program 8 times [2021-12-18 19:36:42,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:42,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582049217] [2021-12-18 19:36:42,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:42,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:42,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:42,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582049217] [2021-12-18 19:36:42,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582049217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:42,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563286361] [2021-12-18 19:36:42,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:36:42,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:42,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:42,651 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:42,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-18 19:36:42,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:36:42,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:42,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-18 19:36:42,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:43,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:43,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:36:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:43,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563286361] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:43,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:43,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2021-12-18 19:36:43,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614969898] [2021-12-18 19:36:43,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:43,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-18 19:36:43,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:43,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-18 19:36:43,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-12-18 19:36:43,314 INFO L87 Difference]: Start difference. First operand 409 states and 461 transitions. Second operand has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:43,730 INFO L93 Difference]: Finished difference Result 431 states and 476 transitions. [2021-12-18 19:36:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 19:36:43,730 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 27 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 56 [2021-12-18 19:36:43,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:43,731 INFO L225 Difference]: With dead ends: 431 [2021-12-18 19:36:43,731 INFO L226 Difference]: Without dead ends: 431 [2021-12-18 19:36:43,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=303, Invalid=1257, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 19:36:43,732 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 232 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:43,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 554 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 19:36:43,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-12-18 19:36:43,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 414. [2021-12-18 19:36:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 411 states have (on average 1.1338199513381995) internal successors, (466), 413 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 466 transitions. [2021-12-18 19:36:43,737 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 466 transitions. Word has length 56 [2021-12-18 19:36:43,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:43,737 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 466 transitions. [2021-12-18 19:36:43,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 466 transitions. [2021-12-18 19:36:43,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-18 19:36:43,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:43,739 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:43,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-18 19:36:43,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:43,947 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:43,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:43,948 INFO L85 PathProgramCache]: Analyzing trace with hash -12898575, now seen corresponding path program 12 times [2021-12-18 19:36:43,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:43,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838306609] [2021-12-18 19:36:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:43,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 51 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:36:44,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:44,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838306609] [2021-12-18 19:36:44,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838306609] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:44,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850095502] [2021-12-18 19:36:44,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:36:44,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:44,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:44,852 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:44,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-18 19:36:45,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-18 19:36:45,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:45,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-18 19:36:45,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:45,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:36:46,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:36:46,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 31 [2021-12-18 19:36:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:36:46,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:46,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 90 [2021-12-18 19:36:46,569 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-12-18 19:36:46,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 170 treesize of output 144 [2021-12-18 19:36:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:36:47,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850095502] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:47,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:47,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 63 [2021-12-18 19:36:47,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693987384] [2021-12-18 19:36:47,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:47,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-18 19:36:47,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:47,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-18 19:36:47,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=3436, Unknown=0, NotChecked=0, Total=3906 [2021-12-18 19:36:47,526 INFO L87 Difference]: Start difference. First operand 414 states and 466 transitions. Second operand has 63 states, 63 states have (on average 2.1904761904761907) internal successors, (138), 63 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:36:56,712 INFO L93 Difference]: Finished difference Result 821 states and 896 transitions. [2021-12-18 19:36:56,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-18 19:36:56,712 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.1904761904761907) internal successors, (138), 63 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-18 19:36:56,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:36:56,714 INFO L225 Difference]: With dead ends: 821 [2021-12-18 19:36:56,714 INFO L226 Difference]: Without dead ends: 804 [2021-12-18 19:36:56,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 69 SyntacticMatches, 11 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7092 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=3922, Invalid=20258, Unknown=0, NotChecked=0, Total=24180 [2021-12-18 19:36:56,715 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 782 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 2559 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 2559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:36:56,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 609 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 2559 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-18 19:36:56,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-12-18 19:36:56,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 475. [2021-12-18 19:36:56,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 472 states have (on average 1.1419491525423728) internal successors, (539), 474 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:56,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 539 transitions. [2021-12-18 19:36:56,722 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 539 transitions. Word has length 57 [2021-12-18 19:36:56,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:36:56,723 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 539 transitions. [2021-12-18 19:36:56,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.1904761904761907) internal successors, (138), 63 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:36:56,723 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 539 transitions. [2021-12-18 19:36:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 19:36:56,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:36:56,724 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:36:56,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-18 19:36:56,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-12-18 19:36:56,947 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:36:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:36:56,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1089586808, now seen corresponding path program 4 times [2021-12-18 19:36:56,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:36:56,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520572471] [2021-12-18 19:36:56,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:36:56,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:36:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:36:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:36:57,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:36:57,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520572471] [2021-12-18 19:36:57,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520572471] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:36:57,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599379241] [2021-12-18 19:36:57,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:36:57,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:36:57,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:36:57,128 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:36:57,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-18 19:36:57,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:36:57,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:36:57,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 19:36:57,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:36:57,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:36:57,298 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:36:57,298 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:36:57,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:36:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-18 19:36:57,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:36:58,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:36:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-18 19:36:58,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599379241] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:36:58,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:36:58,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2021-12-18 19:36:58,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837727440] [2021-12-18 19:36:58,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:36:58,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 19:36:58,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:36:58,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 19:36:58,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-12-18 19:36:58,407 INFO L87 Difference]: Start difference. First operand 475 states and 539 transitions. Second operand has 34 states, 33 states have (on average 3.484848484848485) internal successors, (115), 34 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) [2021-12-18 19:37:01,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:01,063 INFO L93 Difference]: Finished difference Result 533 states and 592 transitions. [2021-12-18 19:37:01,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-18 19:37:01,064 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.484848484848485) internal successors, (115), 34 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 59 [2021-12-18 19:37:01,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:01,065 INFO L225 Difference]: With dead ends: 533 [2021-12-18 19:37:01,065 INFO L226 Difference]: Without dead ends: 533 [2021-12-18 19:37:01,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1097, Invalid=5875, Unknown=0, NotChecked=0, Total=6972 [2021-12-18 19:37:01,066 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 469 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:01,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 482 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1143 Invalid, 0 Unknown, 17 Unchecked, 0.5s Time] [2021-12-18 19:37:01,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-12-18 19:37:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 505. [2021-12-18 19:37:01,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 502 states have (on average 1.1414342629482073) internal successors, (573), 504 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 573 transitions. [2021-12-18 19:37:01,088 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 573 transitions. Word has length 59 [2021-12-18 19:37:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:01,088 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 573 transitions. [2021-12-18 19:37:01,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.484848484848485) internal successors, (115), 34 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) [2021-12-18 19:37:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 573 transitions. [2021-12-18 19:37:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 19:37:01,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:01,090 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:01,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-18 19:37:01,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:01,303 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:37:01,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:01,304 INFO L85 PathProgramCache]: Analyzing trace with hash -193422740, now seen corresponding path program 5 times [2021-12-18 19:37:01,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:01,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766159788] [2021-12-18 19:37:01,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:01,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:37:01,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:01,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766159788] [2021-12-18 19:37:01,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766159788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:01,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147336044] [2021-12-18 19:37:01,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:37:01,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:01,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:01,560 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:01,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-18 19:37:01,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-18 19:37:01,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:01,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 19:37:01,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:01,733 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:37:01,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:37:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:37:02,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 66 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:37:02,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147336044] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:02,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:02,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 48 [2021-12-18 19:37:02,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634132594] [2021-12-18 19:37:02,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:02,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 19:37:02,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:02,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 19:37:02,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2037, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 19:37:02,830 INFO L87 Difference]: Start difference. First operand 505 states and 573 transitions. Second operand has 49 states, 48 states have (on average 3.3958333333333335) internal successors, (163), 49 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) [2021-12-18 19:37:03,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:03,782 INFO L93 Difference]: Finished difference Result 746 states and 822 transitions. [2021-12-18 19:37:03,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 19:37:03,782 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.3958333333333335) internal successors, (163), 49 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-18 19:37:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:03,784 INFO L225 Difference]: With dead ends: 746 [2021-12-18 19:37:03,784 INFO L226 Difference]: Without dead ends: 720 [2021-12-18 19:37:03,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1043, Invalid=3927, Unknown=0, NotChecked=0, Total=4970 [2021-12-18 19:37:03,784 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 334 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:03,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 614 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1563 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 19:37:03,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-12-18 19:37:03,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 510. [2021-12-18 19:37:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 507 states have (on average 1.126232741617357) internal successors, (571), 509 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:03,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 571 transitions. [2021-12-18 19:37:03,791 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 571 transitions. Word has length 59 [2021-12-18 19:37:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:03,791 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 571 transitions. [2021-12-18 19:37:03,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.3958333333333335) internal successors, (163), 49 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) [2021-12-18 19:37:03,792 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 571 transitions. [2021-12-18 19:37:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-18 19:37:03,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:03,793 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:03,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-18 19:37:04,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-18 19:37:04,007 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:37:04,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:04,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1399784233, now seen corresponding path program 9 times [2021-12-18 19:37:04,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:04,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101329048] [2021-12-18 19:37:04,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:04,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:04,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:04,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101329048] [2021-12-18 19:37:04,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101329048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:04,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113575188] [2021-12-18 19:37:04,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:37:04,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:04,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:04,623 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:04,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-18 19:37:04,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-18 19:37:04,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:04,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-18 19:37:04,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:04,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:37:05,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:37:05,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:37:05,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:37:05,483 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 [2021-12-18 19:37:05,518 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 [2021-12-18 19:37:05,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:37:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:05,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:05,571 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1568 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1568) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2021-12-18 19:37:05,578 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1568 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1568) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:37:05,585 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1568 (Array Int Int)) (v_ArrVal_1567 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1567) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1568) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:37:05,591 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1568 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1568) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:37:05,597 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1568 (Array Int Int)) (v_ArrVal_1566 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1566) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1568) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:37:05,603 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1568 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1568) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 3)) 0)) is different from false [2021-12-18 19:37:05,619 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1568 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1568) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0)) is different from false [2021-12-18 19:37:05,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:37:05,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:37:05,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:37:05,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:37:05,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:37:06,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:37:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 23 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 23 not checked. [2021-12-18 19:37:06,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113575188] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:06,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:06,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 56 [2021-12-18 19:37:06,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14738355] [2021-12-18 19:37:06,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:06,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-18 19:37:06,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:06,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-18 19:37:06,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=2097, Unknown=7, NotChecked=700, Total=3080 [2021-12-18 19:37:06,184 INFO L87 Difference]: Start difference. First operand 510 states and 571 transitions. Second operand has 56 states, 56 states have (on average 2.732142857142857) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:07,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:07,462 INFO L93 Difference]: Finished difference Result 572 states and 631 transitions. [2021-12-18 19:37:07,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 19:37:07,463 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.732142857142857) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-18 19:37:07,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:07,464 INFO L225 Difference]: With dead ends: 572 [2021-12-18 19:37:07,464 INFO L226 Difference]: Without dead ends: 534 [2021-12-18 19:37:07,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 87 SyntacticMatches, 11 SemanticMatches, 75 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=681, Invalid=4170, Unknown=7, NotChecked=994, Total=5852 [2021-12-18 19:37:07,465 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 195 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 651 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:07,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 469 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 854 Invalid, 0 Unknown, 651 Unchecked, 0.3s Time] [2021-12-18 19:37:07,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-12-18 19:37:07,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 518. [2021-12-18 19:37:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 515 states have (on average 1.120388349514563) internal successors, (577), 517 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 577 transitions. [2021-12-18 19:37:07,471 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 577 transitions. Word has length 60 [2021-12-18 19:37:07,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:07,471 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 577 transitions. [2021-12-18 19:37:07,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.732142857142857) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:07,471 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 577 transitions. [2021-12-18 19:37:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 19:37:07,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:07,472 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:07,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:07,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:07,691 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:37:07,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:07,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1085063474, now seen corresponding path program 13 times [2021-12-18 19:37:07,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:07,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257042656] [2021-12-18 19:37:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:07,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:07,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:07,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257042656] [2021-12-18 19:37:07,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257042656] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:07,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827459274] [2021-12-18 19:37:07,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:37:07,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:07,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:07,986 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:07,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-18 19:37:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:08,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-18 19:37:08,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:08,125 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:37:08,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:37:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 91 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:08,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 120 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:37:09,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827459274] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:09,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:09,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 60 [2021-12-18 19:37:09,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785142599] [2021-12-18 19:37:09,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:09,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-18 19:37:09,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:09,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-18 19:37:09,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=3176, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:37:09,424 INFO L87 Difference]: Start difference. First operand 518 states and 577 transitions. Second operand has 61 states, 60 states have (on average 2.8833333333333333) internal successors, (173), 61 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:10,467 INFO L93 Difference]: Finished difference Result 981 states and 1067 transitions. [2021-12-18 19:37:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 19:37:10,467 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 2.8833333333333333) internal successors, (173), 61 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-18 19:37:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:10,470 INFO L225 Difference]: With dead ends: 981 [2021-12-18 19:37:10,470 INFO L226 Difference]: Without dead ends: 981 [2021-12-18 19:37:10,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1190, Invalid=4972, Unknown=0, NotChecked=0, Total=6162 [2021-12-18 19:37:10,471 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 317 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1820 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 1900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:10,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 690 Invalid, 1900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1820 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:37:10,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-12-18 19:37:10,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 526. [2021-12-18 19:37:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 523 states have (on average 1.124282982791587) internal successors, (588), 525 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:10,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 588 transitions. [2021-12-18 19:37:10,481 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 588 transitions. Word has length 61 [2021-12-18 19:37:10,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:10,482 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 588 transitions. [2021-12-18 19:37:10,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 2.8833333333333333) internal successors, (173), 61 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:10,482 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 588 transitions. [2021-12-18 19:37:10,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 19:37:10,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:10,483 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:10,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:10,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-18 19:37:10,708 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:37:10,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:10,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2052733487, now seen corresponding path program 6 times [2021-12-18 19:37:10,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:10,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107521577] [2021-12-18 19:37:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:10,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 42 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:37:11,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:11,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107521577] [2021-12-18 19:37:11,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107521577] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:11,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461666913] [2021-12-18 19:37:11,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:37:11,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:11,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:11,070 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:11,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-18 19:37:11,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-18 19:37:11,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:11,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-18 19:37:11,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:11,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:37:11,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:37:11,631 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:37:11,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:11,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-18 19:37:11,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 19:37:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:37:12,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461666913] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:12,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:12,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2021-12-18 19:37:12,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508716005] [2021-12-18 19:37:12,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:12,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 19:37:12,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:12,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 19:37:12,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 19:37:12,026 INFO L87 Difference]: Start difference. First operand 526 states and 588 transitions. Second operand has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:12,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:12,979 INFO L93 Difference]: Finished difference Result 568 states and 627 transitions. [2021-12-18 19:37:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 19:37:12,980 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-18 19:37:12,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:12,981 INFO L225 Difference]: With dead ends: 568 [2021-12-18 19:37:12,981 INFO L226 Difference]: Without dead ends: 563 [2021-12-18 19:37:12,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1243, Invalid=3313, Unknown=0, NotChecked=0, Total=4556 [2021-12-18 19:37:12,981 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 573 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:12,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [573 Valid, 350 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 506 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2021-12-18 19:37:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-12-18 19:37:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 511. [2021-12-18 19:37:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 508 states have (on average 1.124015748031496) internal successors, (571), 510 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 571 transitions. [2021-12-18 19:37:12,988 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 571 transitions. Word has length 61 [2021-12-18 19:37:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:12,988 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 571 transitions. [2021-12-18 19:37:12,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 571 transitions. [2021-12-18 19:37:12,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 19:37:12,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:12,989 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:13,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:13,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-18 19:37:13,211 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:37:13,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:13,211 INFO L85 PathProgramCache]: Analyzing trace with hash -881133237, now seen corresponding path program 7 times [2021-12-18 19:37:13,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:13,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196821153] [2021-12-18 19:37:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:13,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:37:13,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:13,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196821153] [2021-12-18 19:37:13,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196821153] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:13,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799024271] [2021-12-18 19:37:13,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:37:13,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:13,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:13,692 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:13,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-18 19:37:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:13,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 19:37:13,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:14,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:37:14,383 INFO L354 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2021-12-18 19:37:14,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2021-12-18 19:37:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 52 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:37:14,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:14,569 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 [2021-12-18 19:37:14,574 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-18 19:37:14,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 60 [2021-12-18 19:37:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:37:14,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799024271] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:14,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:14,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 50 [2021-12-18 19:37:14,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651648229] [2021-12-18 19:37:14,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:14,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-18 19:37:14,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:14,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-18 19:37:14,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2134, Unknown=0, NotChecked=0, Total=2450 [2021-12-18 19:37:14,993 INFO L87 Difference]: Start difference. First operand 511 states and 571 transitions. Second operand has 50 states, 50 states have (on average 2.64) internal successors, (132), 50 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:16,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:16,711 INFO L93 Difference]: Finished difference Result 660 states and 727 transitions. [2021-12-18 19:37:16,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 19:37:16,712 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.64) internal successors, (132), 50 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-18 19:37:16,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:16,713 INFO L225 Difference]: With dead ends: 660 [2021-12-18 19:37:16,713 INFO L226 Difference]: Without dead ends: 651 [2021-12-18 19:37:16,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1194, Invalid=5448, Unknown=0, NotChecked=0, Total=6642 [2021-12-18 19:37:16,714 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 422 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:16,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 657 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 845 Invalid, 0 Unknown, 255 Unchecked, 0.4s Time] [2021-12-18 19:37:16,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-12-18 19:37:16,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 508. [2021-12-18 19:37:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 505 states have (on average 1.120792079207921) internal successors, (566), 507 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 566 transitions. [2021-12-18 19:37:16,718 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 566 transitions. Word has length 61 [2021-12-18 19:37:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:16,719 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 566 transitions. [2021-12-18 19:37:16,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.64) internal successors, (132), 50 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 566 transitions. [2021-12-18 19:37:16,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 19:37:16,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:16,720 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:16,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-18 19:37:16,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-18 19:37:16,935 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:37:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:16,936 INFO L85 PathProgramCache]: Analyzing trace with hash 931055015, now seen corresponding path program 14 times [2021-12-18 19:37:16,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:16,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321140530] [2021-12-18 19:37:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:16,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 54 proven. 146 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:37:18,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:18,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321140530] [2021-12-18 19:37:18,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321140530] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:18,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784500580] [2021-12-18 19:37:18,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:37:18,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:18,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:18,058 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:18,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-18 19:37:18,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:37:18,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:18,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-18 19:37:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:18,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:37:19,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:37:19,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 71 treesize of output 35 [2021-12-18 19:37:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 24 proven. 176 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:37:19,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:20,206 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 119 treesize of output 103 [2021-12-18 19:37:20,214 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-12-18 19:37:20,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 195 treesize of output 165 [2021-12-18 19:37:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 80 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:37:21,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784500580] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:21,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:21,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 72 [2021-12-18 19:37:21,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949231422] [2021-12-18 19:37:21,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:21,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-18 19:37:21,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:21,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-18 19:37:21,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=4529, Unknown=0, NotChecked=0, Total=5112 [2021-12-18 19:37:21,497 INFO L87 Difference]: Start difference. First operand 508 states and 566 transitions. Second operand has 72 states, 72 states have (on average 2.1666666666666665) internal successors, (156), 72 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) [2021-12-18 19:37:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:34,012 INFO L93 Difference]: Finished difference Result 1135 states and 1237 transitions. [2021-12-18 19:37:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-18 19:37:34,012 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.1666666666666665) internal successors, (156), 72 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) Word has length 63 [2021-12-18 19:37:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:34,014 INFO L225 Difference]: With dead ends: 1135 [2021-12-18 19:37:34,014 INFO L226 Difference]: Without dead ends: 1116 [2021-12-18 19:37:34,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 73 SyntacticMatches, 13 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8980 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=4709, Invalid=25393, Unknown=0, NotChecked=0, Total=30102 [2021-12-18 19:37:34,016 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 654 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 2588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:34,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 666 Invalid, 2588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 2085 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-18 19:37:34,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-12-18 19:37:34,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 575. [2021-12-18 19:37:34,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 572 states have (on average 1.1293706293706294) internal successors, (646), 574 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 646 transitions. [2021-12-18 19:37:34,021 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 646 transitions. Word has length 63 [2021-12-18 19:37:34,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:34,021 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 646 transitions. [2021-12-18 19:37:34,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.1666666666666665) internal successors, (156), 72 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) [2021-12-18 19:37:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 646 transitions. [2021-12-18 19:37:34,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-18 19:37:34,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:34,023 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:34,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:34,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-12-18 19:37:34,243 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:37:34,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:34,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1503155668, now seen corresponding path program 10 times [2021-12-18 19:37:34,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:34,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616341789] [2021-12-18 19:37:34,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:34,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:37:34,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:34,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616341789] [2021-12-18 19:37:34,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616341789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:34,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073788757] [2021-12-18 19:37:34,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:37:34,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:34,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:34,874 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:34,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-18 19:37:35,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:37:35,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:35,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-18 19:37:35,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:35,058 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:37:35,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:37:35,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:37:35,475 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 13 treesize of output 9 [2021-12-18 19:37:35,515 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 [2021-12-18 19:37:35,696 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 [2021-12-18 19:37:35,816 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 [2021-12-18 19:37:35,929 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 [2021-12-18 19:37:36,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:37:36,022 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 17 treesize of output 7 [2021-12-18 19:37:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 13 proven. 34 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:37:36,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:41,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:37:41,301 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 [2021-12-18 19:37:41,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:37:41,306 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 [2021-12-18 19:37:41,310 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 [2021-12-18 19:37:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 10 proven. 32 refuted. 5 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:37:42,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073788757] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:42,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:42,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 18, 18] total 58 [2021-12-18 19:37:42,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364878622] [2021-12-18 19:37:42,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:42,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-18 19:37:42,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:42,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-18 19:37:42,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=3047, Unknown=49, NotChecked=0, Total=3306 [2021-12-18 19:37:42,077 INFO L87 Difference]: Start difference. First operand 575 states and 646 transitions. Second operand has 58 states, 58 states have (on average 2.4482758620689653) internal successors, (142), 58 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:43,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:43,866 INFO L93 Difference]: Finished difference Result 695 states and 778 transitions. [2021-12-18 19:37:43,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 19:37:43,866 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.4482758620689653) internal successors, (142), 58 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-18 19:37:43,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:43,868 INFO L225 Difference]: With dead ends: 695 [2021-12-18 19:37:43,868 INFO L226 Difference]: Without dead ends: 652 [2021-12-18 19:37:43,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1764 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=643, Invalid=7498, Unknown=49, NotChecked=0, Total=8190 [2021-12-18 19:37:43,868 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 234 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:43,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 1031 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 829 Invalid, 0 Unknown, 358 Unchecked, 0.4s Time] [2021-12-18 19:37:43,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-12-18 19:37:43,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 646. [2021-12-18 19:37:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 643 states have (on average 1.124416796267496) internal successors, (723), 645 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:43,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 723 transitions. [2021-12-18 19:37:43,873 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 723 transitions. Word has length 64 [2021-12-18 19:37:43,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:43,873 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 723 transitions. [2021-12-18 19:37:43,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.4482758620689653) internal successors, (142), 58 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:43,873 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 723 transitions. [2021-12-18 19:37:43,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-18 19:37:43,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:43,874 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:43,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-18 19:37:44,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:44,096 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:37:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1148899794, now seen corresponding path program 8 times [2021-12-18 19:37:44,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:44,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305522417] [2021-12-18 19:37:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:44,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:37:44,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:44,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305522417] [2021-12-18 19:37:44,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305522417] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:44,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904999437] [2021-12-18 19:37:44,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:37:44,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:44,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:44,331 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:44,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-18 19:37:44,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:37:44,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:44,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-18 19:37:44,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:44,541 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:37:44,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:37:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:37:45,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:37:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 45 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:37:45,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904999437] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:37:45,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:37:45,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2021-12-18 19:37:45,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895993875] [2021-12-18 19:37:45,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:37:45,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 19:37:45,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:37:45,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 19:37:45,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 19:37:45,676 INFO L87 Difference]: Start difference. First operand 646 states and 723 transitions. Second operand has 46 states, 45 states have (on average 3.577777777777778) internal successors, (161), 46 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) [2021-12-18 19:37:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:37:46,417 INFO L93 Difference]: Finished difference Result 669 states and 744 transitions. [2021-12-18 19:37:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 19:37:46,423 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.577777777777778) internal successors, (161), 46 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) Word has length 65 [2021-12-18 19:37:46,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:37:46,424 INFO L225 Difference]: With dead ends: 669 [2021-12-18 19:37:46,424 INFO L226 Difference]: Without dead ends: 669 [2021-12-18 19:37:46,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=718, Invalid=2942, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:37:46,425 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 313 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:37:46,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 468 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:37:46,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-12-18 19:37:46,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 646. [2021-12-18 19:37:46,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 643 states have (on average 1.124416796267496) internal successors, (723), 645 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:37:46,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 723 transitions. [2021-12-18 19:37:46,429 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 723 transitions. Word has length 65 [2021-12-18 19:37:46,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:37:46,429 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 723 transitions. [2021-12-18 19:37:46,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.577777777777778) internal successors, (161), 46 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) [2021-12-18 19:37:46,429 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 723 transitions. [2021-12-18 19:37:46,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-18 19:37:46,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:37:46,430 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:37:46,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-12-18 19:37:46,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:46,635 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:37:46,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:37:46,635 INFO L85 PathProgramCache]: Analyzing trace with hash 525787682, now seen corresponding path program 9 times [2021-12-18 19:37:46,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:37:46,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765667806] [2021-12-18 19:37:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:37:46,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:37:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:37:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 45 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:37:47,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:37:47,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765667806] [2021-12-18 19:37:47,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765667806] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:37:47,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228789230] [2021-12-18 19:37:47,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:37:47,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:37:47,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:37:47,126 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:37:47,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-18 19:37:47,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-18 19:37:47,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:37:47,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-18 19:37:47,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:37:47,424 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:37:47,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:37:47,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:37:59,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:37:59,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:37:59,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:37:59,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:37:59,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:37:59,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:37:59,993 INFO L354 Elim1Store]: treesize reduction 24, result has 84.7 percent of original size [2021-12-18 19:37:59,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 159 [2021-12-18 19:38:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 25 proven. 45 refuted. 1 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:38:00,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:02,338 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 85 treesize of output 73 [2021-12-18 19:38:02,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:02,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:02,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:02,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:02,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:02,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:02,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:38:02,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 133 treesize of output 199 [2021-12-18 19:38:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 1 proven. 112 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 19:38:05,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228789230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:05,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:05,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 25] total 66 [2021-12-18 19:38:05,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246181817] [2021-12-18 19:38:05,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:05,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-18 19:38:05,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:05,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-18 19:38:05,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=3973, Unknown=5, NotChecked=0, Total=4422 [2021-12-18 19:38:05,187 INFO L87 Difference]: Start difference. First operand 646 states and 723 transitions. Second operand has 67 states, 66 states have (on average 2.3333333333333335) internal successors, (154), 67 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:12,437 INFO L93 Difference]: Finished difference Result 767 states and 858 transitions. [2021-12-18 19:38:12,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-18 19:38:12,437 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.3333333333333335) internal successors, (154), 67 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-18 19:38:12,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:12,439 INFO L225 Difference]: With dead ends: 767 [2021-12-18 19:38:12,439 INFO L226 Difference]: Without dead ends: 666 [2021-12-18 19:38:12,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4570 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=1907, Invalid=17548, Unknown=5, NotChecked=0, Total=19460 [2021-12-18 19:38:12,440 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 120 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:12,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 781 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1215 Invalid, 0 Unknown, 262 Unchecked, 0.5s Time] [2021-12-18 19:38:12,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-12-18 19:38:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 604. [2021-12-18 19:38:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 601 states have (on average 1.124792013311148) internal successors, (676), 603 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 676 transitions. [2021-12-18 19:38:12,446 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 676 transitions. Word has length 65 [2021-12-18 19:38:12,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:12,446 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 676 transitions. [2021-12-18 19:38:12,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.3333333333333335) internal successors, (154), 67 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 676 transitions. [2021-12-18 19:38:12,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 19:38:12,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:12,447 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:12,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-18 19:38:12,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-12-18 19:38:12,648 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:38:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:12,648 INFO L85 PathProgramCache]: Analyzing trace with hash 766851057, now seen corresponding path program 3 times [2021-12-18 19:38:12,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:12,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379916665] [2021-12-18 19:38:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:12,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 19:38:13,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:13,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379916665] [2021-12-18 19:38:13,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379916665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:13,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457705785] [2021-12-18 19:38:13,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:38:13,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:13,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:13,190 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:13,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-18 19:38:13,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-18 19:38:13,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:13,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-18 19:38:13,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:13,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:38:13,950 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:38:13,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2021-12-18 19:38:13,956 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 8 treesize of output 3 [2021-12-18 19:38:14,263 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:38:14,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-18 19:38:14,433 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:38:14,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-18 19:38:14,671 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:38:14,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-18 19:38:14,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:14,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:38:14,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 14 [2021-12-18 19:38:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:38:15,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:15,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:38:15,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-12-18 19:38:15,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:38:15,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:38:15,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:38:15,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:38:15,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:38:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:38:16,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457705785] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:16,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:16,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 21] total 66 [2021-12-18 19:38:16,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727338696] [2021-12-18 19:38:16,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:16,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-18 19:38:16,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:16,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-18 19:38:16,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4042, Unknown=8, NotChecked=0, Total=4290 [2021-12-18 19:38:16,455 INFO L87 Difference]: Start difference. First operand 604 states and 676 transitions. Second operand has 66 states, 66 states have (on average 2.3484848484848486) internal successors, (155), 66 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:18,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:18,411 INFO L93 Difference]: Finished difference Result 761 states and 854 transitions. [2021-12-18 19:38:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-18 19:38:18,411 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.3484848484848486) internal successors, (155), 66 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-18 19:38:18,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:18,412 INFO L225 Difference]: With dead ends: 761 [2021-12-18 19:38:18,413 INFO L226 Difference]: Without dead ends: 704 [2021-12-18 19:38:18,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=536, Invalid=8012, Unknown=8, NotChecked=0, Total=8556 [2021-12-18 19:38:18,413 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 191 mSDsluCounter, 1688 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1740 SdHoareTripleChecker+Invalid, 2181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 680 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:18,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1740 Invalid, 2181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1448 Invalid, 0 Unknown, 680 Unchecked, 0.6s Time] [2021-12-18 19:38:18,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-12-18 19:38:18,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 671. [2021-12-18 19:38:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 668 states have (on average 1.1347305389221556) internal successors, (758), 670 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 758 transitions. [2021-12-18 19:38:18,420 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 758 transitions. Word has length 66 [2021-12-18 19:38:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:18,420 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 758 transitions. [2021-12-18 19:38:18,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.3484848484848486) internal successors, (155), 66 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 758 transitions. [2021-12-18 19:38:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-18 19:38:18,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:18,421 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:18,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-18 19:38:18,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:18,637 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:38:18,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:18,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1378829372, now seen corresponding path program 15 times [2021-12-18 19:38:18,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:18,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996784078] [2021-12-18 19:38:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:18,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 91 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:19,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:19,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996784078] [2021-12-18 19:38:19,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996784078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:19,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675463428] [2021-12-18 19:38:19,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:38:19,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:19,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:19,038 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:19,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-18 19:38:19,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-18 19:38:19,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:19,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-18 19:38:19,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:19,302 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:38:19,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:38:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 120 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:20,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 153 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:21,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675463428] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:21,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:21,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 66 [2021-12-18 19:38:21,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430726918] [2021-12-18 19:38:21,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:21,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-18 19:38:21,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:21,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-18 19:38:21,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=3846, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 19:38:21,152 INFO L87 Difference]: Start difference. First operand 671 states and 758 transitions. Second operand has 67 states, 66 states have (on average 2.893939393939394) internal successors, (191), 67 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:22,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:22,781 INFO L93 Difference]: Finished difference Result 1259 states and 1368 transitions. [2021-12-18 19:38:22,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 19:38:22,781 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.893939393939394) internal successors, (191), 67 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-18 19:38:22,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:22,784 INFO L225 Difference]: With dead ends: 1259 [2021-12-18 19:38:22,784 INFO L226 Difference]: Without dead ends: 1259 [2021-12-18 19:38:22,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1777 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1773, Invalid=6969, Unknown=0, NotChecked=0, Total=8742 [2021-12-18 19:38:22,784 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 649 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:22,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 702 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1746 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 19:38:22,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-12-18 19:38:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 673. [2021-12-18 19:38:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 670 states have (on average 1.1343283582089552) internal successors, (760), 672 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 760 transitions. [2021-12-18 19:38:22,794 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 760 transitions. Word has length 67 [2021-12-18 19:38:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:22,794 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 760 transitions. [2021-12-18 19:38:22,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.893939393939394) internal successors, (191), 67 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 760 transitions. [2021-12-18 19:38:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-18 19:38:22,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:22,795 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:22,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-12-18 19:38:22,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-18 19:38:22,995 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:38:22,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:22,996 INFO L85 PathProgramCache]: Analyzing trace with hash -569162641, now seen corresponding path program 11 times [2021-12-18 19:38:22,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:22,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305225200] [2021-12-18 19:38:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:22,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:38:23,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:23,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305225200] [2021-12-18 19:38:23,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305225200] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:23,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518991180] [2021-12-18 19:38:23,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:38:23,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:23,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:23,185 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:23,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-18 19:38:23,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-18 19:38:23,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:23,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-18 19:38:23,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:23,487 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:38:23,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:38:23,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:38:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:38:24,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:38:24,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518991180] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:24,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:24,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2021-12-18 19:38:24,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653182477] [2021-12-18 19:38:24,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:24,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 19:38:24,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:24,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 19:38:24,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 19:38:24,612 INFO L87 Difference]: Start difference. First operand 673 states and 760 transitions. Second operand has 39 states, 38 states have (on average 3.8421052631578947) internal successors, (146), 39 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:25,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:25,650 INFO L93 Difference]: Finished difference Result 727 states and 805 transitions. [2021-12-18 19:38:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 19:38:25,650 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.8421052631578947) internal successors, (146), 39 states have internal predecessors, (146), 0 states have call successors, (0), 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 68 [2021-12-18 19:38:25,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:25,652 INFO L225 Difference]: With dead ends: 727 [2021-12-18 19:38:25,652 INFO L226 Difference]: Without dead ends: 727 [2021-12-18 19:38:25,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=640, Invalid=3020, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:38:25,653 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 491 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:25,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 631 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:38:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-12-18 19:38:25,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 686. [2021-12-18 19:38:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 683 states have (on average 1.1317715959004393) internal successors, (773), 685 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 773 transitions. [2021-12-18 19:38:25,660 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 773 transitions. Word has length 68 [2021-12-18 19:38:25,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:25,660 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 773 transitions. [2021-12-18 19:38:25,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.8421052631578947) internal successors, (146), 39 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:25,660 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 773 transitions. [2021-12-18 19:38:25,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-18 19:38:25,661 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:25,662 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:25,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-18 19:38:25,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:25,867 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:38:25,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:25,868 INFO L85 PathProgramCache]: Analyzing trace with hash 2089868573, now seen corresponding path program 16 times [2021-12-18 19:38:25,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:25,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579184730] [2021-12-18 19:38:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:25,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 69 proven. 183 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:38:27,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:27,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579184730] [2021-12-18 19:38:27,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579184730] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:27,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378260791] [2021-12-18 19:38:27,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:38:27,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:27,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:27,399 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:27,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-18 19:38:27,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:38:27,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:27,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-18 19:38:27,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:27,570 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:38:27,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:38:28,403 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 13 treesize of output 9 [2021-12-18 19:38:30,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:30,138 INFO L354 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2021-12-18 19:38:30,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 46 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 9 case distinctions, treesize of input 107 treesize of output 1 [2021-12-18 19:38:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 100 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:30,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:31,704 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 149 treesize of output 129 [2021-12-18 19:38:31,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:31,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 245 treesize of output 207 [2021-12-18 19:38:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 91 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:33,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378260791] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:33,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:33,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 37] total 101 [2021-12-18 19:38:33,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102960340] [2021-12-18 19:38:33,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:33,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-18 19:38:33,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:33,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-18 19:38:33,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=975, Invalid=9125, Unknown=0, NotChecked=0, Total=10100 [2021-12-18 19:38:33,378 INFO L87 Difference]: Start difference. First operand 686 states and 773 transitions. Second operand has 101 states, 101 states have (on average 1.9405940594059405) internal successors, (196), 101 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:37,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:37,602 INFO L93 Difference]: Finished difference Result 879 states and 989 transitions. [2021-12-18 19:38:37,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-18 19:38:37,603 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.9405940594059405) internal successors, (196), 101 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-18 19:38:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:37,604 INFO L225 Difference]: With dead ends: 879 [2021-12-18 19:38:37,604 INFO L226 Difference]: Without dead ends: 837 [2021-12-18 19:38:37,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6300 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2422, Invalid=18748, Unknown=0, NotChecked=0, Total=21170 [2021-12-18 19:38:37,605 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 356 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:37,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 567 Invalid, 1456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1162 Invalid, 0 Unknown, 211 Unchecked, 0.6s Time] [2021-12-18 19:38:37,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-12-18 19:38:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 763. [2021-12-18 19:38:37,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 760 states have (on average 1.1394736842105264) internal successors, (866), 762 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 866 transitions. [2021-12-18 19:38:37,610 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 866 transitions. Word has length 69 [2021-12-18 19:38:37,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:37,611 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 866 transitions. [2021-12-18 19:38:37,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.9405940594059405) internal successors, (196), 101 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 866 transitions. [2021-12-18 19:38:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-18 19:38:37,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:37,612 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:37,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-12-18 19:38:37,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:37,823 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:38:37,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:37,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1627104823, now seen corresponding path program 12 times [2021-12-18 19:38:37,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:37,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567573085] [2021-12-18 19:38:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:37,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 11 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:38,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:38,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567573085] [2021-12-18 19:38:38,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567573085] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:38,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495767444] [2021-12-18 19:38:38,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:38:38,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:38,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:38,776 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:38,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-18 19:38:39,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-18 19:38:39,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:39,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 125 conjunts are in the unsatisfiable core [2021-12-18 19:38:39,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:39,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:38:39,864 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 13 treesize of output 9 [2021-12-18 19:38:39,876 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 [2021-12-18 19:38:39,995 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 [2021-12-18 19:38:40,090 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 [2021-12-18 19:38:40,184 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 [2021-12-18 19:38:40,268 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 [2021-12-18 19:38:40,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:38:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:40,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:40,372 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2329 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2329) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2021-12-18 19:38:40,378 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2329 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2329) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:38:40,383 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2329 (Array Int Int)) (v_ArrVal_2328 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2328) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2329) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:38:40,389 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2329 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2329) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:38:40,395 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2329 (Array Int Int)) (v_ArrVal_2327 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2327) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2329) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:38:40,410 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2329 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2329) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 3)) 0)) is different from false [2021-12-18 19:38:40,416 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2329 (Array Int Int)) (v_ArrVal_2326 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2326) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2329) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 3)) 0)) is different from false [2021-12-18 19:38:40,422 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2329 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2329) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 4)) 0)) is different from false [2021-12-18 19:38:40,440 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2329 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2329) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0)) is different from false [2021-12-18 19:38:40,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:38:40,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:38:40,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:38:40,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:38:40,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:38:41,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:38:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 39 not checked. [2021-12-18 19:38:41,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495767444] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:41,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:41,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 27] total 74 [2021-12-18 19:38:41,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70849957] [2021-12-18 19:38:41,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:41,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-18 19:38:41,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:41,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-18 19:38:41,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=3793, Unknown=9, NotChecked=1206, Total=5402 [2021-12-18 19:38:41,150 INFO L87 Difference]: Start difference. First operand 763 states and 866 transitions. Second operand has 74 states, 74 states have (on average 2.6216216216216215) internal successors, (194), 74 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:43,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:43,690 INFO L93 Difference]: Finished difference Result 836 states and 937 transitions. [2021-12-18 19:38:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-18 19:38:43,690 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.6216216216216215) internal successors, (194), 74 states have internal predecessors, (194), 0 states have call successors, (0), 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 72 [2021-12-18 19:38:43,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:43,692 INFO L225 Difference]: With dead ends: 836 [2021-12-18 19:38:43,692 INFO L226 Difference]: Without dead ends: 790 [2021-12-18 19:38:43,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 115 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 3507 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1523, Invalid=10060, Unknown=9, NotChecked=1980, Total=13572 [2021-12-18 19:38:43,693 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 344 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 2639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1037 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:43,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 647 Invalid, 2639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1464 Invalid, 0 Unknown, 1037 Unchecked, 0.6s Time] [2021-12-18 19:38:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-12-18 19:38:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 771. [2021-12-18 19:38:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 768 states have (on average 1.1354166666666667) internal successors, (872), 770 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 872 transitions. [2021-12-18 19:38:43,698 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 872 transitions. Word has length 72 [2021-12-18 19:38:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:43,698 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 872 transitions. [2021-12-18 19:38:43,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.6216216216216215) internal successors, (194), 74 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 872 transitions. [2021-12-18 19:38:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 19:38:43,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:43,700 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:43,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-18 19:38:43,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-18 19:38:43,915 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:38:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1831274874, now seen corresponding path program 17 times [2021-12-18 19:38:43,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:43,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116302674] [2021-12-18 19:38:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:43,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 120 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:44,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:44,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116302674] [2021-12-18 19:38:44,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116302674] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:44,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754558425] [2021-12-18 19:38:44,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:38:44,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:44,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:44,328 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:44,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-18 19:38:44,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-18 19:38:44,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:44,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-18 19:38:44,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:44,542 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:38:44,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:38:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 153 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:45,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 190 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:38:46,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754558425] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:46,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:46,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 69 [2021-12-18 19:38:46,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73330065] [2021-12-18 19:38:46,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:46,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-18 19:38:46,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:46,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-18 19:38:46,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=4180, Unknown=0, NotChecked=0, Total=4830 [2021-12-18 19:38:46,287 INFO L87 Difference]: Start difference. First operand 771 states and 872 transitions. Second operand has 70 states, 69 states have (on average 2.971014492753623) internal successors, (205), 70 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:47,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:47,832 INFO L93 Difference]: Finished difference Result 1550 states and 1679 transitions. [2021-12-18 19:38:47,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 19:38:47,832 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 2.971014492753623) internal successors, (205), 70 states have internal predecessors, (205), 0 states have call successors, (0), 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 73 [2021-12-18 19:38:47,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:47,842 INFO L225 Difference]: With dead ends: 1550 [2021-12-18 19:38:47,842 INFO L226 Difference]: Without dead ends: 1550 [2021-12-18 19:38:47,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2385 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1659, Invalid=6713, Unknown=0, NotChecked=0, Total=8372 [2021-12-18 19:38:47,843 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 404 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 2693 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 2795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:47,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 989 Invalid, 2795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2693 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-18 19:38:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2021-12-18 19:38:47,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 773. [2021-12-18 19:38:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 770 states have (on average 1.135064935064935) internal successors, (874), 772 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 874 transitions. [2021-12-18 19:38:47,850 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 874 transitions. Word has length 73 [2021-12-18 19:38:47,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:47,850 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 874 transitions. [2021-12-18 19:38:47,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 2.971014492753623) internal successors, (205), 70 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 874 transitions. [2021-12-18 19:38:47,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 19:38:47,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:47,851 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:47,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-12-18 19:38:48,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-18 19:38:48,052 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:38:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:48,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1523917955, now seen corresponding path program 10 times [2021-12-18 19:38:48,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:48,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763103279] [2021-12-18 19:38:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:48,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-18 19:38:48,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:48,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763103279] [2021-12-18 19:38:48,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763103279] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:48,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062631564] [2021-12-18 19:38:48,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:38:48,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:48,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:48,435 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:48,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-18 19:38:48,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:38:48,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:48,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-18 19:38:48,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:48,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:38:48,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:38:49,243 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 13 treesize of output 9 [2021-12-18 19:38:49,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:38:49,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-18 19:38:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 21 proven. 66 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:38:49,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:50,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-18 19:38:50,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 19:38:51,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 26 proven. 61 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:38:51,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062631564] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:51,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:51,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 23] total 58 [2021-12-18 19:38:51,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669269447] [2021-12-18 19:38:51,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:51,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-18 19:38:51,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:51,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-18 19:38:51,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2985, Unknown=0, NotChecked=0, Total=3306 [2021-12-18 19:38:51,209 INFO L87 Difference]: Start difference. First operand 773 states and 874 transitions. Second operand has 58 states, 58 states have (on average 2.896551724137931) internal successors, (168), 58 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:53,654 INFO L93 Difference]: Finished difference Result 768 states and 868 transitions. [2021-12-18 19:38:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-18 19:38:53,655 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.896551724137931) internal successors, (168), 58 states have internal predecessors, (168), 0 states have call successors, (0), 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 73 [2021-12-18 19:38:53,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:53,656 INFO L225 Difference]: With dead ends: 768 [2021-12-18 19:38:53,656 INFO L226 Difference]: Without dead ends: 763 [2021-12-18 19:38:53,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2832 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1297, Invalid=9005, Unknown=0, NotChecked=0, Total=10302 [2021-12-18 19:38:53,657 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 344 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:53,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 596 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 979 Invalid, 0 Unknown, 168 Unchecked, 0.5s Time] [2021-12-18 19:38:53,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-12-18 19:38:53,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 760. [2021-12-18 19:38:53,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 757 states have (on average 1.1360634081902246) internal successors, (860), 759 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 860 transitions. [2021-12-18 19:38:53,662 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 860 transitions. Word has length 73 [2021-12-18 19:38:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:53,662 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 860 transitions. [2021-12-18 19:38:53,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.896551724137931) internal successors, (168), 58 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:53,662 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 860 transitions. [2021-12-18 19:38:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 19:38:53,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:53,663 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:53,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-12-18 19:38:53,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:53,863 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:38:53,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:53,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1397249283, now seen corresponding path program 11 times [2021-12-18 19:38:53,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:53,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796600363] [2021-12-18 19:38:53,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:53,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:38:54,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:54,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796600363] [2021-12-18 19:38:54,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796600363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:54,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063153524] [2021-12-18 19:38:54,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:38:54,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:54,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:54,490 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:54,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-18 19:38:54,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-18 19:38:54,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:38:54,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-18 19:38:54,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:38:55,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:38:55,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:55,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:55,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:38:55,679 INFO L354 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2021-12-18 19:38:55,679 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 [2021-12-18 19:38:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 18 proven. 81 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:38:55,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:38:55,905 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 [2021-12-18 19:38:55,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:55,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:55,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:38:55,909 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 [2021-12-18 19:38:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 33 proven. 66 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:38:56,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063153524] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:38:56,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:38:56,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 58 [2021-12-18 19:38:56,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318382312] [2021-12-18 19:38:56,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:38:56,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-18 19:38:56,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:38:56,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-18 19:38:56,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2902, Unknown=0, NotChecked=0, Total=3306 [2021-12-18 19:38:56,774 INFO L87 Difference]: Start difference. First operand 760 states and 860 transitions. Second operand has 58 states, 58 states have (on average 2.706896551724138) internal successors, (157), 58 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:38:58,205 INFO L93 Difference]: Finished difference Result 798 states and 892 transitions. [2021-12-18 19:38:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 19:38:58,205 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.706896551724138) internal successors, (157), 58 states have internal predecessors, (157), 0 states have call successors, (0), 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 73 [2021-12-18 19:38:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:38:58,207 INFO L225 Difference]: With dead ends: 798 [2021-12-18 19:38:58,207 INFO L226 Difference]: Without dead ends: 789 [2021-12-18 19:38:58,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=859, Invalid=5147, Unknown=0, NotChecked=0, Total=6006 [2021-12-18 19:38:58,207 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 477 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:38:58,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 619 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 821 Invalid, 0 Unknown, 78 Unchecked, 0.4s Time] [2021-12-18 19:38:58,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-12-18 19:38:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 747. [2021-12-18 19:38:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 744 states have (on average 1.1344086021505377) internal successors, (844), 746 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 844 transitions. [2021-12-18 19:38:58,234 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 844 transitions. Word has length 73 [2021-12-18 19:38:58,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:38:58,234 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 844 transitions. [2021-12-18 19:38:58,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.706896551724138) internal successors, (157), 58 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:38:58,235 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 844 transitions. [2021-12-18 19:38:58,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-18 19:38:58,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:38:58,235 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:38:58,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-12-18 19:38:58,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:58,436 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:38:58,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:38:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1081436845, now seen corresponding path program 18 times [2021-12-18 19:38:58,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:38:58,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969410211] [2021-12-18 19:38:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:38:58,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:38:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:38:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 102 proven. 208 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:38:59,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:38:59,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969410211] [2021-12-18 19:38:59,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969410211] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:38:59,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202213895] [2021-12-18 19:38:59,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:38:59,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:38:59,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:38:59,948 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:38:59,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-18 19:39:00,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-18 19:39:00,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:00,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-18 19:39:00,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:01,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:39:03,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:03,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 87 treesize of output 43 [2021-12-18 19:39:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 30 proven. 280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:03,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:03,827 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 149 treesize of output 129 [2021-12-18 19:39:03,833 INFO L354 Elim1Store]: treesize reduction 522, result has 0.2 percent of original size [2021-12-18 19:39:03,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 245 treesize of output 207 [2021-12-18 19:39:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 120 proven. 190 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:05,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202213895] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:05,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:05,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 78 [2021-12-18 19:39:05,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277715343] [2021-12-18 19:39:05,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:05,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-18 19:39:05,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:05,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-18 19:39:05,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=5364, Unknown=0, NotChecked=0, Total=6006 [2021-12-18 19:39:05,729 INFO L87 Difference]: Start difference. First operand 747 states and 844 transitions. Second operand has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 78 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:26,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:26,115 INFO L93 Difference]: Finished difference Result 1645 states and 1794 transitions. [2021-12-18 19:39:26,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-12-18 19:39:26,115 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 78 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-18 19:39:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:26,118 INFO L225 Difference]: With dead ends: 1645 [2021-12-18 19:39:26,118 INFO L226 Difference]: Without dead ends: 1599 [2021-12-18 19:39:26,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 88 SyntacticMatches, 22 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16706 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=7315, Invalid=43085, Unknown=0, NotChecked=0, Total=50400 [2021-12-18 19:39:26,120 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 994 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 3480 mSolverCounterSat, 1037 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 4517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1037 IncrementalHoareTripleChecker+Valid, 3480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:26,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 771 Invalid, 4517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1037 Valid, 3480 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-18 19:39:26,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-12-18 19:39:26,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 824. [2021-12-18 19:39:26,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 821 states have (on average 1.1412911084043849) internal successors, (937), 823 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:26,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 937 transitions. [2021-12-18 19:39:26,138 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 937 transitions. Word has length 75 [2021-12-18 19:39:26,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:26,139 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 937 transitions. [2021-12-18 19:39:26,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 78 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:26,139 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 937 transitions. [2021-12-18 19:39:26,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-18 19:39:26,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:26,140 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:26,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-18 19:39:26,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-12-18 19:39:26,347 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:39:26,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:26,348 INFO L85 PathProgramCache]: Analyzing trace with hash 176586938, now seen corresponding path program 13 times [2021-12-18 19:39:26,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:26,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115904350] [2021-12-18 19:39:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:26,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 10 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:39:27,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:27,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115904350] [2021-12-18 19:39:27,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115904350] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:27,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197311479] [2021-12-18 19:39:27,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:39:27,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:27,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:27,003 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:39:27,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-18 19:39:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:27,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-18 19:39:27,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:27,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:39:27,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:39:27,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:39:27,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:39:28,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:39:28,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:39:28,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:39:28,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:39:28,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:28,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 19:39:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:39:28,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:28,715 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2679 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2679) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2021-12-18 19:39:28,723 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2679 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2679) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:39:28,741 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2679 (Array Int Int)) (v_ArrVal_2678 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2678) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2679) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:39:28,750 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2679 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2679) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:39:28,759 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2679 (Array Int Int)) (v_ArrVal_2677 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2677) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2679) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:39:28,767 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2679 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2679) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 3)) 0)) is different from false [2021-12-18 19:39:28,774 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2679 (Array Int Int)) (v_ArrVal_2676 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_2676) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2679) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 3)) 0)) is different from false [2021-12-18 19:39:28,837 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2679 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_#t~post5#1.offset_222| Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_2679) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_222| 4)) 0) (< |c_ULTIMATE.start_cstrcat_~s2#1.offset| |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_222|) (< |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_222| 0))) is different from false [2021-12-18 19:39:28,870 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2679 (Array Int Int)) (|v_ULTIMATE.start_cstrcat_#t~post5#1.offset_222| Int)) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_222|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2679) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_222| 4)) 0) (< |v_ULTIMATE.start_cstrcat_#t~post5#1.offset_222| 0))) is different from false [2021-12-18 19:39:28,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:28,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:39:28,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:28,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:39:28,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:39:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 66 trivial. 38 not checked. [2021-12-18 19:39:29,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197311479] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:29,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:29,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 22, 22] total 66 [2021-12-18 19:39:29,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696075644] [2021-12-18 19:39:29,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:29,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-18 19:39:29,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:29,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-18 19:39:29,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2996, Unknown=9, NotChecked=1062, Total=4290 [2021-12-18 19:39:29,788 INFO L87 Difference]: Start difference. First operand 824 states and 937 transitions. Second operand has 66 states, 66 states have (on average 2.5303030303030303) internal successors, (167), 66 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:31,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:31,379 INFO L93 Difference]: Finished difference Result 997 states and 1118 transitions. [2021-12-18 19:39:31,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 19:39:31,379 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.5303030303030303) internal successors, (167), 66 states have internal predecessors, (167), 0 states have call successors, (0), 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 76 [2021-12-18 19:39:31,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:31,381 INFO L225 Difference]: With dead ends: 997 [2021-12-18 19:39:31,381 INFO L226 Difference]: Without dead ends: 946 [2021-12-18 19:39:31,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 116 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 9 IntricatePredicates, 1 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=388, Invalid=5189, Unknown=9, NotChecked=1386, Total=6972 [2021-12-18 19:39:31,381 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 180 mSDsluCounter, 2098 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 2173 SdHoareTripleChecker+Invalid, 3403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1703 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:31,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 2173 Invalid, 3403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1677 Invalid, 0 Unknown, 1703 Unchecked, 0.7s Time] [2021-12-18 19:39:31,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-12-18 19:39:31,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 908. [2021-12-18 19:39:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 905 states have (on average 1.1359116022099447) internal successors, (1028), 907 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1028 transitions. [2021-12-18 19:39:31,388 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1028 transitions. Word has length 76 [2021-12-18 19:39:31,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:31,388 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1028 transitions. [2021-12-18 19:39:31,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.5303030303030303) internal successors, (167), 66 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:31,389 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1028 transitions. [2021-12-18 19:39:31,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-18 19:39:31,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:31,390 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:31,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-18 19:39:31,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:31,590 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:39:31,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:31,590 INFO L85 PathProgramCache]: Analyzing trace with hash -330010662, now seen corresponding path program 12 times [2021-12-18 19:39:31,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:31,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785598274] [2021-12-18 19:39:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:31,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:39:31,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:31,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785598274] [2021-12-18 19:39:31,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785598274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:31,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363465366] [2021-12-18 19:39:31,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:39:31,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:31,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:31,881 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:39:31,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-18 19:39:32,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-18 19:39:32,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:32,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 19:39:32,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:32,200 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:39:32,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:39:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:39:32,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 91 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:39:33,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363465366] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:33,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:33,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2021-12-18 19:39:33,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230680646] [2021-12-18 19:39:33,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:33,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-18 19:39:33,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:33,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-18 19:39:33,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=2961, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 19:39:33,653 INFO L87 Difference]: Start difference. First operand 908 states and 1028 transitions. Second operand has 59 states, 58 states have (on average 3.396551724137931) internal successors, (197), 59 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:34,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:34,717 INFO L93 Difference]: Finished difference Result 1087 states and 1211 transitions. [2021-12-18 19:39:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 19:39:34,717 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.396551724137931) internal successors, (197), 59 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-18 19:39:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:34,719 INFO L225 Difference]: With dead ends: 1087 [2021-12-18 19:39:34,719 INFO L226 Difference]: Without dead ends: 1072 [2021-12-18 19:39:34,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1321, Invalid=4999, Unknown=0, NotChecked=0, Total=6320 [2021-12-18 19:39:34,720 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 319 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:34,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 472 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:39:34,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-12-18 19:39:34,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 926. [2021-12-18 19:39:34,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 923 states have (on average 1.1278439869989165) internal successors, (1041), 925 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:34,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1041 transitions. [2021-12-18 19:39:34,727 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1041 transitions. Word has length 77 [2021-12-18 19:39:34,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:34,727 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1041 transitions. [2021-12-18 19:39:34,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.396551724137931) internal successors, (197), 59 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:34,727 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1041 transitions. [2021-12-18 19:39:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-18 19:39:34,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:34,728 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:34,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-18 19:39:34,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:34,931 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:39:34,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:34,932 INFO L85 PathProgramCache]: Analyzing trace with hash 363252863, now seen corresponding path program 4 times [2021-12-18 19:39:34,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:34,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916503550] [2021-12-18 19:39:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:34,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 10 proven. 133 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 19:39:35,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:35,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916503550] [2021-12-18 19:39:35,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916503550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:35,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104249361] [2021-12-18 19:39:35,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:39:35,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:35,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:35,685 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:39:35,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-18 19:39:35,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:39:35,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:39:35,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-18 19:39:35,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:35,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:39:35,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:39:36,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 19:39:36,404 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 [2021-12-18 19:39:36,590 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 [2021-12-18 19:39:36,722 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 [2021-12-18 19:39:36,850 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 [2021-12-18 19:39:36,968 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 [2021-12-18 19:39:37,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:39:37,072 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 17 treesize of output 7 [2021-12-18 19:39:37,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:39:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-18 19:39:37,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:46,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:46,777 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 [2021-12-18 19:39:46,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:39:46,782 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 [2021-12-18 19:39:46,785 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 [2021-12-18 19:39:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 16 proven. 51 refuted. 11 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-18 19:39:47,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104249361] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:47,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:47,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 21, 21] total 66 [2021-12-18 19:39:47,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465014730] [2021-12-18 19:39:47,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:47,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-18 19:39:47,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:47,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-18 19:39:47,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=3955, Unknown=62, NotChecked=0, Total=4290 [2021-12-18 19:39:47,738 INFO L87 Difference]: Start difference. First operand 926 states and 1041 transitions. Second operand has 66 states, 66 states have (on average 2.621212121212121) internal successors, (173), 66 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:49,945 INFO L93 Difference]: Finished difference Result 1152 states and 1308 transitions. [2021-12-18 19:39:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-18 19:39:49,946 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.621212121212121) internal successors, (173), 66 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-18 19:39:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:49,949 INFO L225 Difference]: With dead ends: 1152 [2021-12-18 19:39:49,949 INFO L226 Difference]: Without dead ends: 1083 [2021-12-18 19:39:49,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=935, Invalid=10559, Unknown=62, NotChecked=0, Total=11556 [2021-12-18 19:39:49,950 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 298 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 554 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:49,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1609 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1223 Invalid, 0 Unknown, 554 Unchecked, 0.5s Time] [2021-12-18 19:39:49,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-12-18 19:39:49,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1019. [2021-12-18 19:39:49,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1016 states have (on average 1.138779527559055) internal successors, (1157), 1018 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1157 transitions. [2021-12-18 19:39:49,957 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1157 transitions. Word has length 78 [2021-12-18 19:39:49,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:49,957 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 1157 transitions. [2021-12-18 19:39:49,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.621212121212121) internal successors, (173), 66 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:49,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1157 transitions. [2021-12-18 19:39:49,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-18 19:39:49,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:49,959 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:49,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-12-18 19:39:50,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:50,163 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:39:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:50,164 INFO L85 PathProgramCache]: Analyzing trace with hash 829638640, now seen corresponding path program 19 times [2021-12-18 19:39:50,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:50,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435867885] [2021-12-18 19:39:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:50,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 153 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:50,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:50,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435867885] [2021-12-18 19:39:50,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435867885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:50,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757823461] [2021-12-18 19:39:50,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:39:50,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:50,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:50,628 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:39:50,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-18 19:39:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:50,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-18 19:39:50,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:50,855 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:39:50,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:39:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 190 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:51,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 231 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:39:52,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757823461] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:52,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:52,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 78 [2021-12-18 19:39:52,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063358902] [2021-12-18 19:39:52,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:52,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-18 19:39:52,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-18 19:39:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=5381, Unknown=0, NotChecked=0, Total=6162 [2021-12-18 19:39:52,904 INFO L87 Difference]: Start difference. First operand 1019 states and 1157 transitions. Second operand has 79 states, 78 states have (on average 2.91025641025641) internal successors, (227), 79 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:39:54,795 INFO L93 Difference]: Finished difference Result 2108 states and 2291 transitions. [2021-12-18 19:39:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-18 19:39:54,795 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 2.91025641025641) internal successors, (227), 79 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-18 19:39:54,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:39:54,802 INFO L225 Difference]: With dead ends: 2108 [2021-12-18 19:39:54,803 INFO L226 Difference]: Without dead ends: 2108 [2021-12-18 19:39:54,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3040 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1937, Invalid=8365, Unknown=0, NotChecked=0, Total=10302 [2021-12-18 19:39:54,804 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 526 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 3521 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 3665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:39:54,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 1350 Invalid, 3665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 3521 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-18 19:39:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-12-18 19:39:54,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1021. [2021-12-18 19:39:54,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1018 states have (on average 1.1385068762278978) internal successors, (1159), 1020 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:54,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1159 transitions. [2021-12-18 19:39:54,813 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1159 transitions. Word has length 79 [2021-12-18 19:39:54,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:39:54,814 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1159 transitions. [2021-12-18 19:39:54,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 2.91025641025641) internal successors, (227), 79 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:39:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1159 transitions. [2021-12-18 19:39:54,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-18 19:39:54,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:39:54,815 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:39:54,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-12-18 19:39:55,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:55,029 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:39:55,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:39:55,029 INFO L85 PathProgramCache]: Analyzing trace with hash -486302029, now seen corresponding path program 13 times [2021-12-18 19:39:55,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:39:55,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869277011] [2021-12-18 19:39:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:39:55,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:39:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:39:55,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:39:55,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869277011] [2021-12-18 19:39:55,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869277011] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:39:55,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410981705] [2021-12-18 19:39:55,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:39:55,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:39:55,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:39:55,824 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:39:55,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-18 19:39:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:39:56,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 19:39:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:39:56,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:39:57,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:39:57,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:39:57,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:39:57,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:39:57,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:39:57,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:39:57,140 INFO L354 Elim1Store]: treesize reduction 27, result has 47.1 percent of original size [2021-12-18 19:39:57,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 42 [2021-12-18 19:39:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 22 proven. 112 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:39:57,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:39:57,418 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 59 treesize of output 51 [2021-12-18 19:39:57,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:39:57,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:39:57,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:39:57,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:39:57,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:39:57,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:39:57,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 81 [2021-12-18 19:39:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-18 19:39:58,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410981705] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:39:58,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:39:58,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 65 [2021-12-18 19:39:58,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70704374] [2021-12-18 19:39:58,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:39:58,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-18 19:39:58,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:39:58,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-18 19:39:58,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=3659, Unknown=0, NotChecked=0, Total=4160 [2021-12-18 19:39:58,414 INFO L87 Difference]: Start difference. First operand 1021 states and 1159 transitions. Second operand has 65 states, 65 states have (on average 2.6615384615384614) internal successors, (173), 65 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:00,361 INFO L93 Difference]: Finished difference Result 1054 states and 1182 transitions. [2021-12-18 19:40:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 19:40:00,361 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.6615384615384614) internal successors, (173), 65 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-18 19:40:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:00,363 INFO L225 Difference]: With dead ends: 1054 [2021-12-18 19:40:00,363 INFO L226 Difference]: Without dead ends: 1032 [2021-12-18 19:40:00,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1155, Invalid=6677, Unknown=0, NotChecked=0, Total=7832 [2021-12-18 19:40:00,364 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 377 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:00,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 643 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1058 Invalid, 0 Unknown, 149 Unchecked, 0.5s Time] [2021-12-18 19:40:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-12-18 19:40:00,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 979. [2021-12-18 19:40:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 976 states have (on average 1.1362704918032787) internal successors, (1109), 978 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:00,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1109 transitions. [2021-12-18 19:40:00,370 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1109 transitions. Word has length 79 [2021-12-18 19:40:00,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:00,370 INFO L470 AbstractCegarLoop]: Abstraction has 979 states and 1109 transitions. [2021-12-18 19:40:00,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.6615384615384614) internal successors, (173), 65 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:00,370 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1109 transitions. [2021-12-18 19:40:00,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-18 19:40:00,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:00,371 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:00,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-12-18 19:40:00,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-12-18 19:40:00,572 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:40:00,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:00,572 INFO L85 PathProgramCache]: Analyzing trace with hash -867360211, now seen corresponding path program 14 times [2021-12-18 19:40:00,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:00,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90220204] [2021-12-18 19:40:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:00,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 36 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:01,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:01,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90220204] [2021-12-18 19:40:01,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90220204] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:01,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473825013] [2021-12-18 19:40:01,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:40:01,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:01,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:01,707 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:01,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-18 19:40:01,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:40:01,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:01,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-18 19:40:01,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:02,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:40:03,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:03,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:03,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:03,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:03,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:03,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:03,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:03,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:03,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:03,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:03,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:03,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:03,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:03,491 INFO L354 Elim1Store]: treesize reduction 39, result has 49.4 percent of original size [2021-12-18 19:40:03,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 64 [2021-12-18 19:40:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:03,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:03,902 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 89 treesize of output 77 [2021-12-18 19:40:03,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:03,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:03,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:03,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:03,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:03,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:03,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:03,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:03,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:03,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:03,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:03,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:03,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:03,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:03,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:03,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 123 [2021-12-18 19:40:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 60 proven. 120 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 19:40:04,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473825013] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:04,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:04,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 75 [2021-12-18 19:40:04,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256049218] [2021-12-18 19:40:04,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:04,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-18 19:40:04,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:04,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-18 19:40:04,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=4922, Unknown=0, NotChecked=0, Total=5550 [2021-12-18 19:40:04,985 INFO L87 Difference]: Start difference. First operand 979 states and 1109 transitions. Second operand has 75 states, 75 states have (on average 2.4133333333333336) internal successors, (181), 75 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:07,211 INFO L93 Difference]: Finished difference Result 1011 states and 1134 transitions. [2021-12-18 19:40:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-18 19:40:07,212 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.4133333333333336) internal successors, (181), 75 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-18 19:40:07,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:07,213 INFO L225 Difference]: With dead ends: 1011 [2021-12-18 19:40:07,213 INFO L226 Difference]: Without dead ends: 996 [2021-12-18 19:40:07,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4241 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1706, Invalid=11176, Unknown=0, NotChecked=0, Total=12882 [2021-12-18 19:40:07,214 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 532 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:07,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 468 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 734 Invalid, 0 Unknown, 273 Unchecked, 0.4s Time] [2021-12-18 19:40:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-12-18 19:40:07,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 956. [2021-12-18 19:40:07,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 953 states have (on average 1.1322140608604407) internal successors, (1079), 955 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:07,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1079 transitions. [2021-12-18 19:40:07,221 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1079 transitions. Word has length 79 [2021-12-18 19:40:07,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:07,222 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 1079 transitions. [2021-12-18 19:40:07,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.4133333333333336) internal successors, (181), 75 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1079 transitions. [2021-12-18 19:40:07,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-18 19:40:07,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:07,223 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:07,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-12-18 19:40:07,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-12-18 19:40:07,443 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:40:07,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:07,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1474678397, now seen corresponding path program 14 times [2021-12-18 19:40:07,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:07,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628957050] [2021-12-18 19:40:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:07,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:40:07,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:07,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628957050] [2021-12-18 19:40:07,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628957050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:07,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98128222] [2021-12-18 19:40:07,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:40:07,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:07,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:07,663 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:07,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-18 19:40:07,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:40:07,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:07,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 19:40:07,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:40:08,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:08,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-18 19:40:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:40:08,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98128222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:08,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:08,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2021-12-18 19:40:08,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143382954] [2021-12-18 19:40:08,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:08,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 19:40:08,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:08,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 19:40:08,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 19:40:08,478 INFO L87 Difference]: Start difference. First operand 956 states and 1079 transitions. Second operand has 35 states, 34 states have (on average 3.588235294117647) internal successors, (122), 35 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:09,208 INFO L93 Difference]: Finished difference Result 1046 states and 1159 transitions. [2021-12-18 19:40:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 19:40:09,209 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.588235294117647) internal successors, (122), 35 states have internal predecessors, (122), 0 states have call successors, (0), 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 80 [2021-12-18 19:40:09,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:09,210 INFO L225 Difference]: With dead ends: 1046 [2021-12-18 19:40:09,210 INFO L226 Difference]: Without dead ends: 1046 [2021-12-18 19:40:09,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=544, Invalid=2318, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 19:40:09,210 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 283 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:09,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 913 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:40:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2021-12-18 19:40:09,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 969. [2021-12-18 19:40:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 966 states have (on average 1.1304347826086956) internal successors, (1092), 968 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1092 transitions. [2021-12-18 19:40:09,220 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1092 transitions. Word has length 80 [2021-12-18 19:40:09,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:09,220 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1092 transitions. [2021-12-18 19:40:09,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.588235294117647) internal successors, (122), 35 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:09,220 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1092 transitions. [2021-12-18 19:40:09,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-18 19:40:09,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:09,222 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:09,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-18 19:40:09,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-12-18 19:40:09,427 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:40:09,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:09,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1581183415, now seen corresponding path program 20 times [2021-12-18 19:40:09,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:09,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509536798] [2021-12-18 19:40:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:09,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 105 proven. 269 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:11,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:11,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509536798] [2021-12-18 19:40:11,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509536798] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:11,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313729239] [2021-12-18 19:40:11,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:40:11,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:11,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:11,434 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:11,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-18 19:40:11,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:40:11,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:11,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-18 19:40:11,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:12,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:40:15,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:15,501 INFO L354 Elim1Store]: treesize reduction 69, result has 51.4 percent of original size [2021-12-18 19:40:15,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 55 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 118 treesize of output 119 [2021-12-18 19:40:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 33 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:15,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:16,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 142 [2021-12-18 19:40:16,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:16,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 228 [2021-12-18 19:40:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 143 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:40:18,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313729239] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:18,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:18,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 100 [2021-12-18 19:40:18,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922183008] [2021-12-18 19:40:18,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:18,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-18 19:40:18,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:18,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-18 19:40:18,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1006, Invalid=8894, Unknown=0, NotChecked=0, Total=9900 [2021-12-18 19:40:18,657 INFO L87 Difference]: Start difference. First operand 969 states and 1092 transitions. Second operand has 100 states, 100 states have (on average 2.12) internal successors, (212), 100 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:24,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:24,691 INFO L93 Difference]: Finished difference Result 1299 states and 1462 transitions. [2021-12-18 19:40:24,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-12-18 19:40:24,695 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.12) internal successors, (212), 100 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-18 19:40:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:24,697 INFO L225 Difference]: With dead ends: 1299 [2021-12-18 19:40:24,697 INFO L226 Difference]: Without dead ends: 1244 [2021-12-18 19:40:24,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 91 SyntacticMatches, 13 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7935 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=3077, Invalid=21415, Unknown=0, NotChecked=0, Total=24492 [2021-12-18 19:40:24,699 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 808 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:24,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 581 Invalid, 1646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1182 Invalid, 0 Unknown, 311 Unchecked, 0.6s Time] [2021-12-18 19:40:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-12-18 19:40:24,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1069. [2021-12-18 19:40:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1066 states have (on average 1.1369606003752346) internal successors, (1212), 1068 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1212 transitions. [2021-12-18 19:40:24,707 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1212 transitions. Word has length 81 [2021-12-18 19:40:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:24,708 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 1212 transitions. [2021-12-18 19:40:24,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.12) internal successors, (212), 100 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1212 transitions. [2021-12-18 19:40:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-18 19:40:24,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:24,709 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:24,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-12-18 19:40:24,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:24,910 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:40:24,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:24,910 INFO L85 PathProgramCache]: Analyzing trace with hash -306279984, now seen corresponding path program 15 times [2021-12-18 19:40:24,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:24,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138939983] [2021-12-18 19:40:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:24,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 66 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 19:40:25,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:25,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138939983] [2021-12-18 19:40:25,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138939983] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:25,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597459399] [2021-12-18 19:40:25,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:40:25,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:25,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:25,243 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:25,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-18 19:40:25,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-18 19:40:25,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:25,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-18 19:40:25,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:25,654 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:40:25,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:40:26,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:40:32,748 INFO L354 Elim1Store]: treesize reduction 8, result has 91.4 percent of original size [2021-12-18 19:40:32,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 103 [2021-12-18 19:40:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:40:34,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:35,240 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 53 treesize of output 45 [2021-12-18 19:40:35,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:40:35,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 117 [2021-12-18 19:40:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:40:36,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597459399] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:36,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:36,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 63 [2021-12-18 19:40:36,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545981190] [2021-12-18 19:40:36,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:36,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-18 19:40:36,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:36,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-18 19:40:36,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=3617, Unknown=2, NotChecked=0, Total=4032 [2021-12-18 19:40:36,385 INFO L87 Difference]: Start difference. First operand 1069 states and 1212 transitions. Second operand has 64 states, 63 states have (on average 2.7936507936507935) internal successors, (176), 64 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:41,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:41,787 INFO L93 Difference]: Finished difference Result 1354 states and 1508 transitions. [2021-12-18 19:40:41,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-12-18 19:40:41,788 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 2.7936507936507935) internal successors, (176), 64 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-18 19:40:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:41,789 INFO L225 Difference]: With dead ends: 1354 [2021-12-18 19:40:41,789 INFO L226 Difference]: Without dead ends: 1243 [2021-12-18 19:40:41,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=2353, Invalid=21207, Unknown=2, NotChecked=0, Total=23562 [2021-12-18 19:40:41,790 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 169 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 573 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:41,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 1231 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2290 Invalid, 0 Unknown, 573 Unchecked, 0.9s Time] [2021-12-18 19:40:41,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-12-18 19:40:41,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1059. [2021-12-18 19:40:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1056 states have (on average 1.1231060606060606) internal successors, (1186), 1058 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1186 transitions. [2021-12-18 19:40:41,797 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1186 transitions. Word has length 83 [2021-12-18 19:40:41,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:41,797 INFO L470 AbstractCegarLoop]: Abstraction has 1059 states and 1186 transitions. [2021-12-18 19:40:41,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 2.7936507936507935) internal successors, (176), 64 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:41,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1186 transitions. [2021-12-18 19:40:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-18 19:40:41,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:41,798 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 7, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:41,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-12-18 19:40:41,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:41,999 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:40:41,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:42,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1839747766, now seen corresponding path program 16 times [2021-12-18 19:40:42,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:42,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157104627] [2021-12-18 19:40:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:42,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 91 proven. 128 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 19:40:42,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:42,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157104627] [2021-12-18 19:40:42,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157104627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:42,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472557558] [2021-12-18 19:40:42,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:40:42,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:42,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:42,332 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:42,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-18 19:40:42,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:40:42,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:42,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-18 19:40:42,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:42,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:42,570 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:40:42,570 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:40:42,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:40:42,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:40:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:43,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:43,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:43,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:43,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:43,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:43,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:43,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:43,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:43,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:43,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:43,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:43,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:43,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:43,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:40:43,841 INFO L354 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2021-12-18 19:40:43,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 73 [2021-12-18 19:40:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-18 19:40:44,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:45,744 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 89 treesize of output 77 [2021-12-18 19:40:45,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:45,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:45,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:45,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:45,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:45,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:45,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:45,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:45,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:45,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:45,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:45,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:45,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:45,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:45,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:45,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 123 [2021-12-18 19:40:46,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:40:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-12-18 19:40:46,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472557558] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:46,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:46,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 66 [2021-12-18 19:40:46,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789877312] [2021-12-18 19:40:46,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:46,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-18 19:40:46,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:46,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-18 19:40:46,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=4035, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 19:40:46,708 INFO L87 Difference]: Start difference. First operand 1059 states and 1186 transitions. Second operand has 67 states, 66 states have (on average 2.484848484848485) internal successors, (164), 67 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:52,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:52,288 INFO L93 Difference]: Finished difference Result 1360 states and 1497 transitions. [2021-12-18 19:40:52,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-18 19:40:52,288 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.484848484848485) internal successors, (164), 67 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-18 19:40:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:52,289 INFO L225 Difference]: With dead ends: 1360 [2021-12-18 19:40:52,289 INFO L226 Difference]: Without dead ends: 1164 [2021-12-18 19:40:52,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4388 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1679, Invalid=17503, Unknown=0, NotChecked=0, Total=19182 [2021-12-18 19:40:52,290 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 95 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 3101 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 3338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 3101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:52,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1110 Invalid, 3338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 3101 Invalid, 0 Unknown, 167 Unchecked, 1.4s Time] [2021-12-18 19:40:52,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-12-18 19:40:52,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 926. [2021-12-18 19:40:52,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 923 states have (on average 1.1191765980498374) internal successors, (1033), 925 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1033 transitions. [2021-12-18 19:40:52,297 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1033 transitions. Word has length 83 [2021-12-18 19:40:52,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:52,297 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1033 transitions. [2021-12-18 19:40:52,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.484848484848485) internal successors, (164), 67 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:52,297 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1033 transitions. [2021-12-18 19:40:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-18 19:40:52,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:52,298 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:52,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-12-18 19:40:52,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:52,511 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:40:52,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:52,512 INFO L85 PathProgramCache]: Analyzing trace with hash 993950021, now seen corresponding path program 15 times [2021-12-18 19:40:52,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:52,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545805062] [2021-12-18 19:40:52,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:52,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 27 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:40:53,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:53,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545805062] [2021-12-18 19:40:53,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545805062] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:53,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027558844] [2021-12-18 19:40:53,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:40:53,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:53,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:53,342 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:53,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-18 19:40:53,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-18 19:40:53,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:53,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 153 conjunts are in the unsatisfiable core [2021-12-18 19:40:53,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:53,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:40:54,717 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 13 treesize of output 9 [2021-12-18 19:40:54,728 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 [2021-12-18 19:40:54,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-18 19:40:54,931 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 [2021-12-18 19:40:55,026 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 [2021-12-18 19:40:55,132 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 [2021-12-18 19:40:55,218 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 [2021-12-18 19:40:55,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:40:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 40 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:40:55,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:40:55,325 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3437 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3437) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2021-12-18 19:40:55,331 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3437 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:40:55,336 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3436 (Array Int Int)) (v_ArrVal_3437 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3436) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:40:55,343 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3437 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:40:55,348 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3435 (Array Int Int)) (v_ArrVal_3437 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3435) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:40:55,354 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3437 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 3)) 0)) is different from false [2021-12-18 19:40:55,363 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3434 (Array Int Int)) (v_ArrVal_3437 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3434) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 3)) 0)) is different from false [2021-12-18 19:40:55,369 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3437 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 4)) 0)) is different from false [2021-12-18 19:40:55,375 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3433 (Array Int Int)) (v_ArrVal_3437 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3433) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 4)) 0)) is different from false [2021-12-18 19:40:55,381 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3437 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 5)) 0)) is different from false [2021-12-18 19:40:55,389 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3437 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3437) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0)) is different from false [2021-12-18 19:40:55,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:40:55,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:40:55,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:40:55,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:40:55,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:40:56,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:40:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 57 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 59 not checked. [2021-12-18 19:40:56,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027558844] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:40:56,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:40:56,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 31, 31] total 81 [2021-12-18 19:40:56,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678229795] [2021-12-18 19:40:56,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:40:56,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-18 19:40:56,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:40:56,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-18 19:40:56,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=4383, Unknown=11, NotChecked=1606, Total=6480 [2021-12-18 19:40:56,193 INFO L87 Difference]: Start difference. First operand 926 states and 1033 transitions. Second operand has 81 states, 81 states have (on average 2.617283950617284) internal successors, (212), 81 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:58,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:40:58,555 INFO L93 Difference]: Finished difference Result 1014 states and 1118 transitions. [2021-12-18 19:40:58,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-18 19:40:58,555 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.617283950617284) internal successors, (212), 81 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-12-18 19:40:58,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:40:58,556 INFO L225 Difference]: With dead ends: 1014 [2021-12-18 19:40:58,556 INFO L226 Difference]: Without dead ends: 960 [2021-12-18 19:40:58,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 120 SyntacticMatches, 18 SemanticMatches, 112 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 3783 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1168, Invalid=9371, Unknown=11, NotChecked=2332, Total=12882 [2021-12-18 19:40:58,557 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 223 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 2966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 881 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:40:58,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 969 Invalid, 2966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2004 Invalid, 0 Unknown, 881 Unchecked, 0.8s Time] [2021-12-18 19:40:58,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-12-18 19:40:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 936. [2021-12-18 19:40:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 933 states have (on average 1.1157556270096463) internal successors, (1041), 935 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1041 transitions. [2021-12-18 19:40:58,562 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1041 transitions. Word has length 84 [2021-12-18 19:40:58,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:40:58,563 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1041 transitions. [2021-12-18 19:40:58,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.617283950617284) internal successors, (212), 81 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:40:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1041 transitions. [2021-12-18 19:40:58,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-18 19:40:58,563 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:40:58,564 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:40:58,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-18 19:40:58,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:58,764 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:40:58,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:40:58,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1945200858, now seen corresponding path program 21 times [2021-12-18 19:40:58,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:40:58,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451374113] [2021-12-18 19:40:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:40:58,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:40:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:40:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:40:59,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:40:59,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451374113] [2021-12-18 19:40:59,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451374113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:40:59,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987383092] [2021-12-18 19:40:59,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:40:59,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:40:59,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:40:59,186 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:40:59,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-18 19:40:59,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-18 19:40:59,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:40:59,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-18 19:40:59,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:40:59,521 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:40:59,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:41:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 231 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:00,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 276 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:02,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987383092] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:02,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:02,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 84 [2021-12-18 19:41:02,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076634072] [2021-12-18 19:41:02,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:02,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-18 19:41:02,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:02,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-18 19:41:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=6225, Unknown=0, NotChecked=0, Total=7140 [2021-12-18 19:41:02,123 INFO L87 Difference]: Start difference. First operand 936 states and 1041 transitions. Second operand has 85 states, 84 states have (on average 2.9166666666666665) internal successors, (245), 85 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:04,668 INFO L93 Difference]: Finished difference Result 1920 states and 2049 transitions. [2021-12-18 19:41:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-18 19:41:04,669 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 2.9166666666666665) internal successors, (245), 85 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-18 19:41:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:04,670 INFO L225 Difference]: With dead ends: 1920 [2021-12-18 19:41:04,670 INFO L226 Difference]: Without dead ends: 1920 [2021-12-18 19:41:04,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3069 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2987, Invalid=11775, Unknown=0, NotChecked=0, Total=14762 [2021-12-18 19:41:04,671 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 700 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 2678 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 2866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:04,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 997 Invalid, 2866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2678 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-18 19:41:04,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-12-18 19:41:04,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 938. [2021-12-18 19:41:04,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 935 states have (on average 1.1155080213903743) internal successors, (1043), 937 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:04,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1043 transitions. [2021-12-18 19:41:04,681 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1043 transitions. Word has length 85 [2021-12-18 19:41:04,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:04,681 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1043 transitions. [2021-12-18 19:41:04,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 2.9166666666666665) internal successors, (245), 85 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:04,682 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1043 transitions. [2021-12-18 19:41:04,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-18 19:41:04,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:04,683 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:04,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-12-18 19:41:04,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:04,903 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:41:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1570286795, now seen corresponding path program 17 times [2021-12-18 19:41:04,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:04,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944502042] [2021-12-18 19:41:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:04,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 19 proven. 96 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-18 19:41:05,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:05,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944502042] [2021-12-18 19:41:05,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944502042] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:05,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945061837] [2021-12-18 19:41:05,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:41:05,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:05,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:05,403 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:05,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-18 19:41:05,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-18 19:41:05,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:05,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 19:41:05,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:06,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:41:06,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:41:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 32 proven. 83 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-18 19:41:06,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:06,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-18 19:41:06,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 19:41:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 49 proven. 66 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-18 19:41:07,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945061837] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:07,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:07,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 49 [2021-12-18 19:41:07,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861244467] [2021-12-18 19:41:07,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:07,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 19:41:07,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:07,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 19:41:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1937, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 19:41:07,025 INFO L87 Difference]: Start difference. First operand 938 states and 1043 transitions. Second operand has 49 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 49 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:08,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:08,641 INFO L93 Difference]: Finished difference Result 1016 states and 1116 transitions. [2021-12-18 19:41:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-18 19:41:08,641 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 49 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-18 19:41:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:08,642 INFO L225 Difference]: With dead ends: 1016 [2021-12-18 19:41:08,642 INFO L226 Difference]: Without dead ends: 1011 [2021-12-18 19:41:08,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2263, Invalid=6109, Unknown=0, NotChecked=0, Total=8372 [2021-12-18 19:41:08,643 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 910 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:08,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 620 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 942 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2021-12-18 19:41:08,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-12-18 19:41:08,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 925. [2021-12-18 19:41:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 922 states have (on average 1.116052060737527) internal successors, (1029), 924 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1029 transitions. [2021-12-18 19:41:08,650 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1029 transitions. Word has length 85 [2021-12-18 19:41:08,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:08,650 INFO L470 AbstractCegarLoop]: Abstraction has 925 states and 1029 transitions. [2021-12-18 19:41:08,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 49 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:08,651 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1029 transitions. [2021-12-18 19:41:08,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-18 19:41:08,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:08,652 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:08,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-12-18 19:41:08,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-12-18 19:41:08,867 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:41:08,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:08,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1027250177, now seen corresponding path program 22 times [2021-12-18 19:41:08,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:08,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965767083] [2021-12-18 19:41:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:08,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 146 proven. 298 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:11,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:11,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965767083] [2021-12-18 19:41:11,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965767083] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:11,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126597042] [2021-12-18 19:41:11,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:41:11,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:11,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:11,135 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:11,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-18 19:41:11,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:41:11,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:11,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-18 19:41:11,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:11,427 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:41:11,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:41:12,590 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 13 treesize of output 9 [2021-12-18 19:41:14,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:14,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:15,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:15,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:15,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:15,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:15,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:15,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:15,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:15,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:15,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:15,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:15,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:15,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:41:15,067 INFO L354 Elim1Store]: treesize reduction 68, result has 52.4 percent of original size [2021-12-18 19:41:15,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 66 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 12 case distinctions, treesize of input 127 treesize of output 125 [2021-12-18 19:41:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 146 proven. 299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:16,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:18,392 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 179 treesize of output 155 [2021-12-18 19:41:18,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:18,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 66 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 249 [2021-12-18 19:41:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 157 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:21,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126597042] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:21,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:21,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 129 [2021-12-18 19:41:21,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533737496] [2021-12-18 19:41:21,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:21,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-12-18 19:41:21,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:21,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-12-18 19:41:21,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1549, Invalid=14963, Unknown=0, NotChecked=0, Total=16512 [2021-12-18 19:41:21,097 INFO L87 Difference]: Start difference. First operand 925 states and 1029 transitions. Second operand has 129 states, 129 states have (on average 1.945736434108527) internal successors, (251), 129 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:27,623 INFO L93 Difference]: Finished difference Result 1273 states and 1408 transitions. [2021-12-18 19:41:27,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-18 19:41:27,623 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.945736434108527) internal successors, (251), 129 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-18 19:41:27,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:27,624 INFO L225 Difference]: With dead ends: 1273 [2021-12-18 19:41:27,624 INFO L226 Difference]: Without dead ends: 1161 [2021-12-18 19:41:27,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13341 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=4048, Invalid=35752, Unknown=0, NotChecked=0, Total=39800 [2021-12-18 19:41:27,626 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 605 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:27,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 728 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1593 Invalid, 0 Unknown, 376 Unchecked, 0.9s Time] [2021-12-18 19:41:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-12-18 19:41:27,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 991. [2021-12-18 19:41:27,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 988 states have (on average 1.1214574898785425) internal successors, (1108), 990 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:27,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1108 transitions. [2021-12-18 19:41:27,634 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1108 transitions. Word has length 87 [2021-12-18 19:41:27,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:27,634 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 1108 transitions. [2021-12-18 19:41:27,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.945736434108527) internal successors, (251), 129 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:27,635 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1108 transitions. [2021-12-18 19:41:27,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-18 19:41:27,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:27,636 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:27,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-12-18 19:41:27,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-12-18 19:41:27,859 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:41:27,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:27,860 INFO L85 PathProgramCache]: Analyzing trace with hash 378160968, now seen corresponding path program 16 times [2021-12-18 19:41:27,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:27,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958672927] [2021-12-18 19:41:27,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:27,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 12 proven. 195 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:41:28,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:28,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958672927] [2021-12-18 19:41:28,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958672927] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:28,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337501111] [2021-12-18 19:41:28,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:41:28,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:28,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:28,723 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:28,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-18 19:41:28,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:41:28,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:28,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-18 19:41:28,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:28,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:41:28,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:41:29,567 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 13 treesize of output 9 [2021-12-18 19:41:29,615 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 [2021-12-18 19:41:29,821 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 [2021-12-18 19:41:29,951 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 [2021-12-18 19:41:30,087 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 [2021-12-18 19:41:30,223 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 [2021-12-18 19:41:30,348 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 [2021-12-18 19:41:30,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:41:30,458 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 17 treesize of output 7 [2021-12-18 19:41:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 37 proven. 80 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:41:30,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:43,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:41:43,684 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 [2021-12-18 19:41:43,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:41:43,689 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 [2021-12-18 19:41:43,692 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 [2021-12-18 19:41:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 24 proven. 73 refuted. 20 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:41:44,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337501111] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:44,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:44,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 24, 24] total 77 [2021-12-18 19:41:44,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089484351] [2021-12-18 19:41:44,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:44,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-18 19:41:44,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:44,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-18 19:41:44,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=5421, Unknown=76, NotChecked=0, Total=5852 [2021-12-18 19:41:44,863 INFO L87 Difference]: Start difference. First operand 991 states and 1108 transitions. Second operand has 77 states, 77 states have (on average 2.5714285714285716) internal successors, (198), 77 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:47,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:47,821 INFO L93 Difference]: Finished difference Result 1153 states and 1286 transitions. [2021-12-18 19:41:47,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-18 19:41:47,821 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.5714285714285716) internal successors, (198), 77 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-18 19:41:47,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:47,823 INFO L225 Difference]: With dead ends: 1153 [2021-12-18 19:41:47,823 INFO L226 Difference]: Without dead ends: 1094 [2021-12-18 19:41:47,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3216 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=1100, Invalid=13586, Unknown=76, NotChecked=0, Total=14762 [2021-12-18 19:41:47,824 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 396 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1830 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:47,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 1830 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1488 Invalid, 0 Unknown, 351 Unchecked, 0.6s Time] [2021-12-18 19:41:47,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-12-18 19:41:47,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1088. [2021-12-18 19:41:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1085 states have (on average 1.1179723502304149) internal successors, (1213), 1087 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1213 transitions. [2021-12-18 19:41:47,830 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1213 transitions. Word has length 88 [2021-12-18 19:41:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:47,830 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1213 transitions. [2021-12-18 19:41:47,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.5714285714285716) internal successors, (198), 77 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1213 transitions. [2021-12-18 19:41:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-18 19:41:47,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:47,831 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:47,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-12-18 19:41:48,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-12-18 19:41:48,032 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:41:48,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:48,032 INFO L85 PathProgramCache]: Analyzing trace with hash 966880780, now seen corresponding path program 18 times [2021-12-18 19:41:48,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:48,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688747297] [2021-12-18 19:41:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:48,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 66 proven. 110 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:41:48,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:48,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688747297] [2021-12-18 19:41:48,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688747297] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:48,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177574237] [2021-12-18 19:41:48,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:41:48,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:48,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:48,436 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:48,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-18 19:41:49,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-18 19:41:49,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:49,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-18 19:41:49,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:49,335 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:41:49,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:41:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 91 proven. 85 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:41:50,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:41:51,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177574237] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:51,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:51,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 60 [2021-12-18 19:41:51,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438269106] [2021-12-18 19:41:51,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:51,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-18 19:41:51,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:51,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-18 19:41:51,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=3189, Unknown=0, NotChecked=0, Total=3660 [2021-12-18 19:41:51,135 INFO L87 Difference]: Start difference. First operand 1088 states and 1213 transitions. Second operand has 61 states, 60 states have (on average 3.6166666666666667) internal successors, (217), 61 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:52,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:41:52,259 INFO L93 Difference]: Finished difference Result 1384 states and 1517 transitions. [2021-12-18 19:41:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 19:41:52,260 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 3.6166666666666667) internal successors, (217), 61 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-18 19:41:52,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:41:52,262 INFO L225 Difference]: With dead ends: 1384 [2021-12-18 19:41:52,262 INFO L226 Difference]: Without dead ends: 1365 [2021-12-18 19:41:52,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1389, Invalid=5583, Unknown=0, NotChecked=0, Total=6972 [2021-12-18 19:41:52,264 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 286 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:41:52,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 674 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:41:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-12-18 19:41:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1123. [2021-12-18 19:41:52,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1120 states have (on average 1.1125) internal successors, (1246), 1122 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1246 transitions. [2021-12-18 19:41:52,289 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1246 transitions. Word has length 89 [2021-12-18 19:41:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:41:52,289 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1246 transitions. [2021-12-18 19:41:52,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 3.6166666666666667) internal successors, (217), 61 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:41:52,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1246 transitions. [2021-12-18 19:41:52,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-18 19:41:52,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:41:52,291 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:41:52,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-12-18 19:41:52,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-12-18 19:41:52,507 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:41:52,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:41:52,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1165127411, now seen corresponding path program 5 times [2021-12-18 19:41:52,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:41:52,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484410165] [2021-12-18 19:41:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:41:52,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:41:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:41:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 195 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 19:41:53,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:41:53,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484410165] [2021-12-18 19:41:53,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484410165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:41:53,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301641397] [2021-12-18 19:41:53,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:41:53,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:41:53,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:41:53,425 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:41:53,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-18 19:41:54,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-18 19:41:54,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:41:54,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 132 conjunts are in the unsatisfiable core [2021-12-18 19:41:54,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:41:54,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:41:55,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:41:55,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-18 19:41:56,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-18 19:41:56,745 INFO L354 Elim1Store]: treesize reduction 9, result has 30.8 percent of original size [2021-12-18 19:41:56,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 12 [2021-12-18 19:41:56,825 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 [2021-12-18 19:41:56,884 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 16 treesize of output 18 [2021-12-18 19:41:56,943 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 [2021-12-18 19:41:56,980 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 [2021-12-18 19:41:56,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:41:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 40 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:41:56,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:41:57,035 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3947 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3947) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2021-12-18 19:41:57,042 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3947 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3947) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:41:57,050 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3946 (Array Int Int)) (v_ArrVal_3947 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3946) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3947) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:41:57,057 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3947 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3947) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:41:57,065 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3945 (Array Int Int)) (v_ArrVal_3947 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3945) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3947) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:41:57,072 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3947 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3947) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 3)) 0)) is different from false [2021-12-18 19:41:57,080 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3944 (Array Int Int)) (v_ArrVal_3947 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3944) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3947) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 3)) 0)) is different from false [2021-12-18 19:41:57,087 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3947 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3947) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 4)) 0)) is different from false [2021-12-18 19:41:57,094 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3943 (Array Int Int)) (v_ArrVal_3947 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_3943) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3947) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 4)) 0)) is different from false [2021-12-18 19:41:57,102 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3947 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3947) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 5)) 0)) is different from false [2021-12-18 19:41:57,114 WARN L838 $PredicateComparison]: unable to prove that (or (= 0 |c_ULTIMATE.start_cstrcat_#t~mem2#1|) (forall ((v_ArrVal_3947 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3947) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 5)) 0))) is different from false [2021-12-18 19:41:57,121 WARN L838 $PredicateComparison]: unable to prove that (or (= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base|) |c_ULTIMATE.start_cstrcat_~s~0#1.offset|)) (forall ((v_ArrVal_3947 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_3947) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 5)) 0))) is different from false [2021-12-18 19:41:57,129 WARN L838 $PredicateComparison]: unable to prove that (or (= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (forall ((v_ArrVal_3947 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3947) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0))) is different from false [2021-12-18 19:41:57,136 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_3947 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3947) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0)) (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length3~0#1| (- 1)) 0) |ULTIMATE.start_main_~nondetString2~0#1.offset|)))) is different from false [2021-12-18 19:41:57,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:41:57,144 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 48 treesize of output 37 [2021-12-18 19:41:57,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:41:57,149 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 50 treesize of output 52 [2021-12-18 19:41:57,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:41:57,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 19:41:57,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:41:57,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 73 [2021-12-18 19:41:58,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:41:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 61 not checked. [2021-12-18 19:41:58,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301641397] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:41:58,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:41:58,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 89 [2021-12-18 19:41:58,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92688573] [2021-12-18 19:41:58,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:41:58,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-18 19:41:58,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:41:58,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-18 19:41:58,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=5042, Unknown=14, NotChecked=2226, Total=7832 [2021-12-18 19:41:58,415 INFO L87 Difference]: Start difference. First operand 1123 states and 1246 transitions. Second operand has 89 states, 89 states have (on average 2.707865168539326) internal successors, (241), 89 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:12,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:12,762 INFO L93 Difference]: Finished difference Result 1391 states and 1555 transitions. [2021-12-18 19:42:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-18 19:42:12,763 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.707865168539326) internal successors, (241), 89 states have internal predecessors, (241), 0 states have call successors, (0), 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 90 [2021-12-18 19:42:12,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:12,764 INFO L225 Difference]: With dead ends: 1391 [2021-12-18 19:42:12,764 INFO L226 Difference]: Without dead ends: 1314 [2021-12-18 19:42:12,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 124 SyntacticMatches, 25 SemanticMatches, 154 ConstructedPredicates, 14 IntricatePredicates, 1 DeprecatedPredicates, 6512 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=2323, Invalid=17737, Unknown=18, NotChecked=4102, Total=24180 [2021-12-18 19:42:12,765 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 929 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 3166 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 1789 SdHoareTripleChecker+Invalid, 6213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 3166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2812 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:12,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [929 Valid, 1789 Invalid, 6213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 3166 Invalid, 0 Unknown, 2812 Unchecked, 1.4s Time] [2021-12-18 19:42:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-12-18 19:42:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1253. [2021-12-18 19:42:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1250 states have (on average 1.1216) internal successors, (1402), 1252 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1402 transitions. [2021-12-18 19:42:12,773 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1402 transitions. Word has length 90 [2021-12-18 19:42:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:12,773 INFO L470 AbstractCegarLoop]: Abstraction has 1253 states and 1402 transitions. [2021-12-18 19:42:12,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.707865168539326) internal successors, (241), 89 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1402 transitions. [2021-12-18 19:42:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-18 19:42:12,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:12,775 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:12,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-12-18 19:42:12,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:12,978 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:42:12,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:12,979 INFO L85 PathProgramCache]: Analyzing trace with hash -108128484, now seen corresponding path program 23 times [2021-12-18 19:42:12,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:12,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114330375] [2021-12-18 19:42:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:12,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 231 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:13,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:13,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114330375] [2021-12-18 19:42:13,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114330375] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:13,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347477932] [2021-12-18 19:42:13,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:42:13,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:13,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:13,585 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:42:13,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-18 19:42:13,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-18 19:42:13,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:13,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-18 19:42:13,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:13,896 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:42:13,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:42:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 276 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:15,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 325 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:42:17,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347477932] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:17,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:17,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 85 [2021-12-18 19:42:17,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130361784] [2021-12-18 19:42:17,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:17,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-18 19:42:17,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:17,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-18 19:42:17,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=6391, Unknown=0, NotChecked=0, Total=7310 [2021-12-18 19:42:17,234 INFO L87 Difference]: Start difference. First operand 1253 states and 1402 transitions. Second operand has 86 states, 85 states have (on average 2.976470588235294) internal successors, (253), 86 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:19,605 INFO L93 Difference]: Finished difference Result 2734 states and 2933 transitions. [2021-12-18 19:42:19,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-18 19:42:19,605 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 2.976470588235294) internal successors, (253), 86 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-18 19:42:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:19,610 INFO L225 Difference]: With dead ends: 2734 [2021-12-18 19:42:19,610 INFO L226 Difference]: Without dead ends: 2734 [2021-12-18 19:42:19,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2970 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2413, Invalid=10243, Unknown=0, NotChecked=0, Total=12656 [2021-12-18 19:42:19,611 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 656 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 3693 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 3873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 3693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:19,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 1377 Invalid, 3873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 3693 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-18 19:42:19,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-12-18 19:42:19,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 1262. [2021-12-18 19:42:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1259 states have (on average 1.1215250198570295) internal successors, (1412), 1261 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 1412 transitions. [2021-12-18 19:42:19,640 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 1412 transitions. Word has length 91 [2021-12-18 19:42:19,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:19,641 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 1412 transitions. [2021-12-18 19:42:19,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 2.976470588235294) internal successors, (253), 86 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:19,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 1412 transitions. [2021-12-18 19:42:19,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-18 19:42:19,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:19,643 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:19,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-12-18 19:42:19,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:19,863 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:42:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:19,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1275627627, now seen corresponding path program 19 times [2021-12-18 19:42:19,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:19,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724272417] [2021-12-18 19:42:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:19,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 23 proven. 123 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-18 19:42:20,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:20,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724272417] [2021-12-18 19:42:20,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724272417] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:20,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344541892] [2021-12-18 19:42:20,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:42:20,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:20,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:20,392 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:42:20,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-18 19:42:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:20,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 19:42:20,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:21,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:42:21,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:42:21,566 INFO L354 Elim1Store]: treesize reduction 15, result has 40.0 percent of original size [2021-12-18 19:42:21,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 20 [2021-12-18 19:42:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 36 proven. 110 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-18 19:42:21,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:21,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-18 19:42:21,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:42:21,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2021-12-18 19:42:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 55 proven. 91 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-18 19:42:22,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344541892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:22,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:22,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 60 [2021-12-18 19:42:22,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505181193] [2021-12-18 19:42:22,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:22,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-18 19:42:22,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:22,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-18 19:42:22,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=3027, Unknown=0, NotChecked=0, Total=3540 [2021-12-18 19:42:22,785 INFO L87 Difference]: Start difference. First operand 1262 states and 1412 transitions. Second operand has 60 states, 60 states have (on average 3.1166666666666667) internal successors, (187), 60 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:24,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:24,407 INFO L93 Difference]: Finished difference Result 1259 states and 1406 transitions. [2021-12-18 19:42:24,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 19:42:24,408 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.1166666666666667) internal successors, (187), 60 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-18 19:42:24,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:24,409 INFO L225 Difference]: With dead ends: 1259 [2021-12-18 19:42:24,409 INFO L226 Difference]: Without dead ends: 1250 [2021-12-18 19:42:24,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1447, Invalid=6209, Unknown=0, NotChecked=0, Total=7656 [2021-12-18 19:42:24,410 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 338 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:24,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 447 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 754 Invalid, 0 Unknown, 132 Unchecked, 0.3s Time] [2021-12-18 19:42:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-12-18 19:42:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1240. [2021-12-18 19:42:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1237 states have (on average 1.1212611156022636) internal successors, (1387), 1239 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1387 transitions. [2021-12-18 19:42:24,417 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1387 transitions. Word has length 91 [2021-12-18 19:42:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:24,417 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1387 transitions. [2021-12-18 19:42:24,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.1166666666666667) internal successors, (187), 60 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1387 transitions. [2021-12-18 19:42:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-18 19:42:24,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:24,418 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:24,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-12-18 19:42:24,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:24,619 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:42:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:24,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1060917733, now seen corresponding path program 20 times [2021-12-18 19:42:24,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:24,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107340274] [2021-12-18 19:42:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:24,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 154 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-18 19:42:25,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:25,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107340274] [2021-12-18 19:42:25,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107340274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:25,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457463389] [2021-12-18 19:42:25,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:42:25,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:25,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:25,612 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:42:25,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-18 19:42:25,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:42:25,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:25,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-18 19:42:25,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:26,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:42:27,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:42:27,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:42:27,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:42:27,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:42:27,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:42:27,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:42:27,219 INFO L354 Elim1Store]: treesize reduction 27, result has 47.1 percent of original size [2021-12-18 19:42:27,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 42 [2021-12-18 19:42:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 31 proven. 145 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-18 19:42:27,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:27,500 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 59 treesize of output 51 [2021-12-18 19:42:27,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:42:27,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:42:27,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:42:27,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:42:27,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:42:27,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:42:27,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 81 [2021-12-18 19:42:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 56 proven. 120 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-18 19:42:28,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457463389] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:28,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:28,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 69 [2021-12-18 19:42:28,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973375676] [2021-12-18 19:42:28,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:28,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-18 19:42:28,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:28,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-18 19:42:28,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=4117, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 19:42:28,685 INFO L87 Difference]: Start difference. First operand 1240 states and 1387 transitions. Second operand has 69 states, 69 states have (on average 2.8260869565217392) internal successors, (195), 69 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:30,909 INFO L93 Difference]: Finished difference Result 1311 states and 1453 transitions. [2021-12-18 19:42:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-18 19:42:30,909 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.8260869565217392) internal successors, (195), 69 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-18 19:42:30,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:30,912 INFO L225 Difference]: With dead ends: 1311 [2021-12-18 19:42:30,912 INFO L226 Difference]: Without dead ends: 1289 [2021-12-18 19:42:30,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3022 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1383, Invalid=7929, Unknown=0, NotChecked=0, Total=9312 [2021-12-18 19:42:30,913 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 543 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:30,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 819 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1330 Invalid, 0 Unknown, 165 Unchecked, 0.6s Time] [2021-12-18 19:42:30,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-12-18 19:42:30,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1230. [2021-12-18 19:42:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1227 states have (on average 1.1206193969030154) internal successors, (1375), 1229 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1375 transitions. [2021-12-18 19:42:30,923 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1375 transitions. Word has length 91 [2021-12-18 19:42:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:30,924 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 1375 transitions. [2021-12-18 19:42:30,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.8260869565217392) internal successors, (195), 69 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1375 transitions. [2021-12-18 19:42:30,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-18 19:42:30,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:30,925 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:30,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-12-18 19:42:31,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-12-18 19:42:31,148 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:42:31,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:31,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1680607371, now seen corresponding path program 17 times [2021-12-18 19:42:31,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:31,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122594952] [2021-12-18 19:42:31,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:31,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:42:31,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:31,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122594952] [2021-12-18 19:42:31,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122594952] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:31,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398699340] [2021-12-18 19:42:31,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:42:31,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:31,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:31,368 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:42:31,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-18 19:42:32,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-18 19:42:32,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:32,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-18 19:42:32,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:32,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:42:32,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:42:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:42:33,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 66 proven. 72 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 19:42:33,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398699340] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:33,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:33,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 48 [2021-12-18 19:42:33,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374571590] [2021-12-18 19:42:33,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:33,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 19:42:33,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:33,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 19:42:33,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2086, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 19:42:33,759 INFO L87 Difference]: Start difference. First operand 1230 states and 1375 transitions. Second operand has 49 states, 48 states have (on average 4.041666666666667) internal successors, (194), 49 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:42:35,293 INFO L93 Difference]: Finished difference Result 1340 states and 1475 transitions. [2021-12-18 19:42:35,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-18 19:42:35,293 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 4.041666666666667) internal successors, (194), 49 states have internal predecessors, (194), 0 states have call successors, (0), 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 92 [2021-12-18 19:42:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:42:35,295 INFO L225 Difference]: With dead ends: 1340 [2021-12-18 19:42:35,295 INFO L226 Difference]: Without dead ends: 1340 [2021-12-18 19:42:35,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1038, Invalid=4662, Unknown=0, NotChecked=0, Total=5700 [2021-12-18 19:42:35,295 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 443 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:42:35,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 1004 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:42:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-12-18 19:42:35,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1243. [2021-12-18 19:42:35,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1240 states have (on average 1.1193548387096774) internal successors, (1388), 1242 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1388 transitions. [2021-12-18 19:42:35,312 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1388 transitions. Word has length 92 [2021-12-18 19:42:35,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:42:35,312 INFO L470 AbstractCegarLoop]: Abstraction has 1243 states and 1388 transitions. [2021-12-18 19:42:35,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 4.041666666666667) internal successors, (194), 49 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:42:35,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1388 transitions. [2021-12-18 19:42:35,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-18 19:42:35,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:42:35,313 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:42:35,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-12-18 19:42:35,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:35,514 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:42:35,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:42:35,514 INFO L85 PathProgramCache]: Analyzing trace with hash -832257419, now seen corresponding path program 24 times [2021-12-18 19:42:35,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:42:35,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767533713] [2021-12-18 19:42:35,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:42:35,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:42:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:42:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 149 proven. 371 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:42:38,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:42:38,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767533713] [2021-12-18 19:42:38,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767533713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:42:38,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204453152] [2021-12-18 19:42:38,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:42:38,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:42:38,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:42:38,648 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:42:38,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-18 19:42:39,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-18 19:42:39,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:42:39,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 141 conjunts are in the unsatisfiable core [2021-12-18 19:42:39,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:42:40,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:42:43,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:42:43,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 78 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 111 treesize of output 55 [2021-12-18 19:42:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 39 proven. 481 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:42:43,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:42:45,328 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 194 treesize of output 168 [2021-12-18 19:42:45,341 INFO L354 Elim1Store]: treesize reduction 912, result has 0.1 percent of original size [2021-12-18 19:42:45,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 320 treesize of output 270 [2021-12-18 19:42:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 195 proven. 325 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:42:49,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204453152] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:42:49,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:42:49,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 106 [2021-12-18 19:42:49,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506620026] [2021-12-18 19:42:49,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:42:49,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-12-18 19:42:49,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:42:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-12-18 19:42:49,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=10050, Unknown=0, NotChecked=0, Total=11130 [2021-12-18 19:42:49,414 INFO L87 Difference]: Start difference. First operand 1243 states and 1388 transitions. Second operand has 106 states, 106 states have (on average 2.188679245283019) internal successors, (232), 106 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:37,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:43:37,113 INFO L93 Difference]: Finished difference Result 2914 states and 3139 transitions. [2021-12-18 19:43:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2021-12-18 19:43:37,114 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.188679245283019) internal successors, (232), 106 states have internal predecessors, (232), 0 states have call successors, (0), 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 93 [2021-12-18 19:43:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:43:37,115 INFO L225 Difference]: With dead ends: 2914 [2021-12-18 19:43:37,115 INFO L226 Difference]: Without dead ends: 2885 [2021-12-18 19:43:37,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 110 SyntacticMatches, 17 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37990 ImplicationChecksByTransitivity, 50.2s TimeCoverageRelationStatistics Valid=12948, Invalid=96944, Unknown=0, NotChecked=0, Total=109892 [2021-12-18 19:43:37,119 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 1318 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 7749 mSolverCounterSat, 1302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1318 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 9051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1302 IncrementalHoareTripleChecker+Valid, 7749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-18 19:43:37,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1318 Valid, 1134 Invalid, 9051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1302 Valid, 7749 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-18 19:43:37,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-12-18 19:43:37,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 1416. [2021-12-18 19:43:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1413 states have (on average 1.1252653927813163) internal successors, (1590), 1415 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 1590 transitions. [2021-12-18 19:43:37,130 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 1590 transitions. Word has length 93 [2021-12-18 19:43:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:43:37,130 INFO L470 AbstractCegarLoop]: Abstraction has 1416 states and 1590 transitions. [2021-12-18 19:43:37,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.188679245283019) internal successors, (232), 106 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 1590 transitions. [2021-12-18 19:43:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 19:43:37,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:43:37,132 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:43:37,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-12-18 19:43:37,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:37,332 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:43:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:43:37,333 INFO L85 PathProgramCache]: Analyzing trace with hash -425919405, now seen corresponding path program 18 times [2021-12-18 19:43:37,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:43:37,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725873262] [2021-12-18 19:43:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:43:37,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:43:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:43:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 44 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:43:38,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:43:38,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725873262] [2021-12-18 19:43:38,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725873262] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:43:38,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381755059] [2021-12-18 19:43:38,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:43:38,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:38,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:43:38,535 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:43:38,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-18 19:43:39,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-18 19:43:39,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:43:39,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 174 conjunts are in the unsatisfiable core [2021-12-18 19:43:39,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:43:40,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:43:41,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:43:41,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:43:41,682 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 [2021-12-18 19:43:41,883 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 [2021-12-18 19:43:42,077 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 [2021-12-18 19:43:42,271 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 [2021-12-18 19:43:42,446 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 [2021-12-18 19:43:42,595 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 [2021-12-18 19:43:42,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:43:42,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:43:42,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-12-18 19:43:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 59 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:43:42,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:43:42,766 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4469 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4469) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2021-12-18 19:43:42,772 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4469 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4469) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:43:42,788 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4468 (Array Int Int)) (v_ArrVal_4469 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4468) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4469) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:43:42,796 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4469 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4469) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:43:42,802 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4467 (Array Int Int)) (v_ArrVal_4469 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4467) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4469) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:43:42,809 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4469 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4469) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 3)) 0)) is different from false [2021-12-18 19:43:42,814 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4466 (Array Int Int)) (v_ArrVal_4469 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4466) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4469) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 3)) 0)) is different from false [2021-12-18 19:43:42,820 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4469 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4469) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 4)) 0)) is different from false [2021-12-18 19:43:42,827 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4465 (Array Int Int)) (v_ArrVal_4469 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4465) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4469) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 4)) 0)) is different from false [2021-12-18 19:43:42,833 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4469 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4469) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 5)) 0)) is different from false [2021-12-18 19:43:42,839 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4464 (Array Int Int)) (v_ArrVal_4469 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4464) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4469) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 5)) 0)) is different from false [2021-12-18 19:43:42,845 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4469 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4469) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 6)) 0)) is different from false [2021-12-18 19:43:42,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:43:42,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:43:42,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:43:42,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:43:42,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:43:44,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:43:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 80 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 83 not checked. [2021-12-18 19:43:44,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381755059] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:43:44,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:43:44,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 36, 36] total 107 [2021-12-18 19:43:44,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263616686] [2021-12-18 19:43:44,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:43:44,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-18 19:43:44,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:43:44,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-18 19:43:44,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=8327, Unknown=12, NotChecked=2364, Total=11342 [2021-12-18 19:43:44,298 INFO L87 Difference]: Start difference. First operand 1416 states and 1590 transitions. Second operand has 107 states, 107 states have (on average 2.5046728971962615) internal successors, (268), 107 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:48,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:43:48,156 INFO L93 Difference]: Finished difference Result 1451 states and 1624 transitions. [2021-12-18 19:43:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-18 19:43:48,157 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.5046728971962615) internal successors, (268), 107 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-18 19:43:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:43:48,158 INFO L225 Difference]: With dead ends: 1451 [2021-12-18 19:43:48,158 INFO L226 Difference]: Without dead ends: 1416 [2021-12-18 19:43:48,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 129 SyntacticMatches, 11 SemanticMatches, 163 ConstructedPredicates, 12 IntricatePredicates, 3 DeprecatedPredicates, 7585 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2443, Invalid=20849, Unknown=12, NotChecked=3756, Total=27060 [2021-12-18 19:43:48,159 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 393 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 2013 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 4120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1988 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:43:48,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 1340 Invalid, 4120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2013 Invalid, 0 Unknown, 1988 Unchecked, 0.8s Time] [2021-12-18 19:43:48,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-12-18 19:43:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1411. [2021-12-18 19:43:48,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1408 states have (on average 1.1242897727272727) internal successors, (1583), 1410 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 1583 transitions. [2021-12-18 19:43:48,168 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 1583 transitions. Word has length 96 [2021-12-18 19:43:48,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:43:48,168 INFO L470 AbstractCegarLoop]: Abstraction has 1411 states and 1583 transitions. [2021-12-18 19:43:48,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.5046728971962615) internal successors, (268), 107 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:48,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 1583 transitions. [2021-12-18 19:43:48,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-18 19:43:48,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:43:48,169 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:43:48,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-12-18 19:43:48,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-12-18 19:43:48,371 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:43:48,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:43:48,371 INFO L85 PathProgramCache]: Analyzing trace with hash 801302482, now seen corresponding path program 25 times [2021-12-18 19:43:48,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:43:48,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405446645] [2021-12-18 19:43:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:43:48,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:43:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:43:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 276 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:43:48,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:43:48,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405446645] [2021-12-18 19:43:48,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405446645] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:43:48,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838682603] [2021-12-18 19:43:48,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:43:48,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:48,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:43:48,906 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:43:48,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-18 19:43:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:43:49,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-18 19:43:49,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:43:49,211 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:43:49,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:43:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 325 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:43:50,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:43:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 378 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:43:52,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838682603] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:43:52,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:43:52,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 96 [2021-12-18 19:43:52,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151615171] [2021-12-18 19:43:52,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:43:52,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-18 19:43:52,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:43:52,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-18 19:43:52,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1150, Invalid=8162, Unknown=0, NotChecked=0, Total=9312 [2021-12-18 19:43:52,687 INFO L87 Difference]: Start difference. First operand 1411 states and 1583 transitions. Second operand has 97 states, 96 states have (on average 2.9270833333333335) internal successors, (281), 97 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:43:55,447 INFO L93 Difference]: Finished difference Result 3073 states and 3311 transitions. [2021-12-18 19:43:55,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-18 19:43:55,448 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 2.9270833333333335) internal successors, (281), 97 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-18 19:43:55,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:43:55,450 INFO L225 Difference]: With dead ends: 3073 [2021-12-18 19:43:55,450 INFO L226 Difference]: Without dead ends: 3073 [2021-12-18 19:43:55,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4721 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2866, Invalid=12634, Unknown=0, NotChecked=0, Total=15500 [2021-12-18 19:43:55,451 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 641 mSDsluCounter, 1798 mSDsCounter, 0 mSdLazyCounter, 4751 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 4931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 4751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:43:55,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 1866 Invalid, 4931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 4751 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-18 19:43:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2021-12-18 19:43:55,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 1425. [2021-12-18 19:43:55,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1422 states have (on average 1.1272855133614628) internal successors, (1603), 1424 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 1603 transitions. [2021-12-18 19:43:55,464 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 1603 transitions. Word has length 97 [2021-12-18 19:43:55,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:43:55,464 INFO L470 AbstractCegarLoop]: Abstraction has 1425 states and 1603 transitions. [2021-12-18 19:43:55,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 2.9270833333333335) internal successors, (281), 97 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:43:55,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 1603 transitions. [2021-12-18 19:43:55,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-18 19:43:55,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:43:55,466 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:43:55,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-12-18 19:43:55,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:55,666 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:43:55,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:43:55,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1252539819, now seen corresponding path program 26 times [2021-12-18 19:43:55,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:43:55,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60458082] [2021-12-18 19:43:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:43:55,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:43:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:43:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 174 proven. 428 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:43:58,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:43:58,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60458082] [2021-12-18 19:43:58,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60458082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:43:58,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812773758] [2021-12-18 19:43:58,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:43:58,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:43:58,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:43:58,949 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:43:58,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-12-18 19:43:59,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:43:59,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:43:59,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 141 conjunts are in the unsatisfiable core [2021-12-18 19:43:59,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:44:01,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:44:05,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:44:05,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 91 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 119 treesize of output 59 [2021-12-18 19:44:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 42 proven. 560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:44:05,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:44:07,595 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 209 treesize of output 181 [2021-12-18 19:44:07,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:44:07,721 INFO L244 Elim1Store]: Index analysis took 118 ms [2021-12-18 19:44:07,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 91 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 345 treesize of output 291 [2021-12-18 19:44:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 224 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:44:14,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812773758] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:44:14,674 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:44:14,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 50] total 119 [2021-12-18 19:44:14,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473770758] [2021-12-18 19:44:14,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:44:14,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-18 19:44:14,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:44:14,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-18 19:44:14,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=12559, Unknown=0, NotChecked=0, Total=14042 [2021-12-18 19:44:14,676 INFO L87 Difference]: Start difference. First operand 1425 states and 1603 transitions. Second operand has 119 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:21,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:45:21,430 INFO L93 Difference]: Finished difference Result 3447 states and 3725 transitions. [2021-12-18 19:45:21,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 302 states. [2021-12-18 19:45:21,430 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-12-18 19:45:21,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:45:21,432 INFO L225 Difference]: With dead ends: 3447 [2021-12-18 19:45:21,432 INFO L226 Difference]: Without dead ends: 3385 [2021-12-18 19:45:21,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 106 SyntacticMatches, 23 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63412 ImplicationChecksByTransitivity, 72.0s TimeCoverageRelationStatistics Valid=17522, Invalid=150988, Unknown=0, NotChecked=0, Total=168510 [2021-12-18 19:45:21,438 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2097 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 4397 mSolverCounterSat, 2467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2097 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 6864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2467 IncrementalHoareTripleChecker+Valid, 4397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-18 19:45:21,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2097 Valid, 688 Invalid, 6864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2467 Valid, 4397 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-18 19:45:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3385 states. [2021-12-18 19:45:21,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3385 to 1637. [2021-12-18 19:45:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1634 states have (on average 1.1321909424724603) internal successors, (1850), 1636 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 1850 transitions. [2021-12-18 19:45:21,457 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 1850 transitions. Word has length 99 [2021-12-18 19:45:21,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:45:21,457 INFO L470 AbstractCegarLoop]: Abstraction has 1637 states and 1850 transitions. [2021-12-18 19:45:21,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 1850 transitions. [2021-12-18 19:45:21,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-18 19:45:21,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:45:21,460 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:45:21,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-12-18 19:45:21,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:45:21,679 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:45:21,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:45:21,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1589149142, now seen corresponding path program 19 times [2021-12-18 19:45:21,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:45:21,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253832109] [2021-12-18 19:45:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:45:21,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:45:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:45:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 14 proven. 269 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:45:22,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:45:22,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253832109] [2021-12-18 19:45:22,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253832109] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:45:22,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258439094] [2021-12-18 19:45:22,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:45:22,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:45:22,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:45:22,663 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:45:22,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-12-18 19:45:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:45:22,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-18 19:45:22,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:45:22,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:45:23,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:45:23,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:45:23,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:45:23,717 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 [2021-12-18 19:45:23,788 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 [2021-12-18 19:45:23,849 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 [2021-12-18 19:45:23,905 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 [2021-12-18 19:45:23,945 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 [2021-12-18 19:45:23,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-18 19:45:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 14 proven. 150 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:45:23,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:45:23,993 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4734 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4734) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2021-12-18 19:45:23,999 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4734 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4734) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:45:24,005 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4733 (Array Int Int)) (v_ArrVal_4734 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4733) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4734) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) is different from false [2021-12-18 19:45:24,011 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4734 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4734) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:45:24,017 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4732 (Array Int Int)) (v_ArrVal_4734 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4732) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4734) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 2)) 0)) is different from false [2021-12-18 19:45:24,023 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4734 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4734) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 3)) 0)) is different from false [2021-12-18 19:45:24,029 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4731 (Array Int Int)) (v_ArrVal_4734 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4731) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4734) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 3)) 0)) is different from false [2021-12-18 19:45:24,046 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4734 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4734) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 4)) 0)) is different from false [2021-12-18 19:45:24,053 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4730 (Array Int Int)) (v_ArrVal_4734 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4730) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4734) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 4)) 0)) is different from false [2021-12-18 19:45:24,059 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4734 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4734) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 5)) 0)) is different from false [2021-12-18 19:45:24,065 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4729 (Array Int Int)) (v_ArrVal_4734 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_4729) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4734) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 5)) 0)) is different from false [2021-12-18 19:45:24,071 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4734 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_4734) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 6)) 0)) is different from false [2021-12-18 19:45:24,078 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4734 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4734) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)) is different from false [2021-12-18 19:45:24,084 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:45:24,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 19:45:24,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:45:24,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 19:45:24,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:45:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 14 proven. 67 refuted. 0 times theorem prover too weak. 120 trivial. 83 not checked. [2021-12-18 19:45:24,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258439094] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:45:24,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:45:24,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 27, 27] total 71 [2021-12-18 19:45:24,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238576282] [2021-12-18 19:45:24,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:45:24,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-18 19:45:24,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:45:24,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-18 19:45:24,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=3125, Unknown=13, NotChecked=1612, Total=4970 [2021-12-18 19:45:24,515 INFO L87 Difference]: Start difference. First operand 1637 states and 1850 transitions. Second operand has 71 states, 71 states have (on average 2.6338028169014085) internal successors, (187), 71 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:26,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:45:26,942 INFO L93 Difference]: Finished difference Result 1865 states and 2090 transitions. [2021-12-18 19:45:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-18 19:45:26,943 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.6338028169014085) internal successors, (187), 71 states have internal predecessors, (187), 0 states have call successors, (0), 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 100 [2021-12-18 19:45:26,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:45:26,944 INFO L225 Difference]: With dead ends: 1865 [2021-12-18 19:45:26,944 INFO L226 Difference]: Without dead ends: 1798 [2021-12-18 19:45:26,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 164 SyntacticMatches, 20 SemanticMatches, 90 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=388, Invalid=5813, Unknown=13, NotChecked=2158, Total=8372 [2021-12-18 19:45:26,945 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 199 mSDsluCounter, 2666 mSDsCounter, 0 mSdLazyCounter, 3268 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 2756 SdHoareTripleChecker+Invalid, 5612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2312 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 19:45:26,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 2756 Invalid, 5612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3268 Invalid, 0 Unknown, 2312 Unchecked, 1.2s Time] [2021-12-18 19:45:26,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-12-18 19:45:26,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1747. [2021-12-18 19:45:26,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1744 states have (on average 1.12901376146789) internal successors, (1969), 1746 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:26,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 1969 transitions. [2021-12-18 19:45:26,955 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 1969 transitions. Word has length 100 [2021-12-18 19:45:26,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:45:26,955 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 1969 transitions. [2021-12-18 19:45:26,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.6338028169014085) internal successors, (187), 71 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:26,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 1969 transitions. [2021-12-18 19:45:26,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 19:45:26,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:45:26,957 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:45:26,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-12-18 19:45:27,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:45:27,158 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:45:27,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:45:27,158 INFO L85 PathProgramCache]: Analyzing trace with hash 711162942, now seen corresponding path program 21 times [2021-12-18 19:45:27,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:45:27,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245164916] [2021-12-18 19:45:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:45:27,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:45:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:45:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 91 proven. 137 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 19:45:27,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:45:27,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245164916] [2021-12-18 19:45:27,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245164916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:45:27,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927261323] [2021-12-18 19:45:27,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:45:27,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:45:27,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:45:27,510 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:45:27,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-12-18 19:45:28,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-18 19:45:28,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:45:28,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-18 19:45:28,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:45:28,130 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:45:28,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:45:28,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:45:28,824 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-12-18 19:45:28,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-12-18 19:45:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:45:29,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:45:30,415 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 40 treesize of output 34 [2021-12-18 19:45:30,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:45:30,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 76 [2021-12-18 19:45:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 45 proven. 75 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 19:45:32,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927261323] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:45:32,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:45:32,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 68 [2021-12-18 19:45:32,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873520258] [2021-12-18 19:45:32,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:45:32,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-18 19:45:32,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:45:32,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-18 19:45:32,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=4228, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 19:45:32,188 INFO L87 Difference]: Start difference. First operand 1747 states and 1969 transitions. Second operand has 69 states, 68 states have (on average 3.1323529411764706) internal successors, (213), 69 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:45:47,479 INFO L93 Difference]: Finished difference Result 2122 states and 2348 transitions. [2021-12-18 19:45:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-12-18 19:45:47,479 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.1323529411764706) internal successors, (213), 69 states have internal predecessors, (213), 0 states have call successors, (0), 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 101 [2021-12-18 19:45:47,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:45:47,480 INFO L225 Difference]: With dead ends: 2122 [2021-12-18 19:45:47,480 INFO L226 Difference]: Without dead ends: 2076 [2021-12-18 19:45:47,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16552 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=12137, Invalid=54685, Unknown=0, NotChecked=0, Total=66822 [2021-12-18 19:45:47,483 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 1095 mSDsluCounter, 2050 mSDsCounter, 0 mSdLazyCounter, 5604 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 7278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 5604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1100 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:45:47,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 2141 Invalid, 7278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 5604 Invalid, 0 Unknown, 1100 Unchecked, 2.5s Time] [2021-12-18 19:45:47,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-12-18 19:45:47,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1747. [2021-12-18 19:45:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1744 states have (on average 1.12098623853211) internal successors, (1955), 1746 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:47,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 1955 transitions. [2021-12-18 19:45:47,494 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 1955 transitions. Word has length 101 [2021-12-18 19:45:47,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:45:47,494 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 1955 transitions. [2021-12-18 19:45:47,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.1323529411764706) internal successors, (213), 69 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:47,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 1955 transitions. [2021-12-18 19:45:47,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 19:45:47,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:45:47,495 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:45:47,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-12-18 19:45:47,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-12-18 19:45:47,699 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:45:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:45:47,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1101622733, now seen corresponding path program 22 times [2021-12-18 19:45:47,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:45:47,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132422603] [2021-12-18 19:45:47,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:45:47,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:45:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:45:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 84 proven. 173 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-18 19:45:48,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:45:48,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132422603] [2021-12-18 19:45:48,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132422603] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:45:48,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211584028] [2021-12-18 19:45:48,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:45:48,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:45:48,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:45:48,006 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:45:48,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-12-18 19:45:48,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:45:48,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:45:48,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-18 19:45:48,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:45:48,282 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:45:48,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:45:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 100 proven. 157 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-18 19:45:48,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:45:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 92 proven. 165 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-18 19:45:49,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211584028] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:45:49,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:45:49,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 63 [2021-12-18 19:45:49,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324076481] [2021-12-18 19:45:49,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:45:49,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-18 19:45:49,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:45:49,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-18 19:45:49,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=690, Invalid=3216, Unknown=0, NotChecked=0, Total=3906 [2021-12-18 19:45:49,468 INFO L87 Difference]: Start difference. First operand 1747 states and 1955 transitions. Second operand has 63 states, 63 states have (on average 3.3015873015873014) internal successors, (208), 63 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:45:50,427 INFO L93 Difference]: Finished difference Result 2149 states and 2350 transitions. [2021-12-18 19:45:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-18 19:45:50,428 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.3015873015873014) internal successors, (208), 63 states have internal predecessors, (208), 0 states have call successors, (0), 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 101 [2021-12-18 19:45:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:45:50,429 INFO L225 Difference]: With dead ends: 2149 [2021-12-18 19:45:50,429 INFO L226 Difference]: Without dead ends: 1976 [2021-12-18 19:45:50,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2386 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1804, Invalid=6206, Unknown=0, NotChecked=0, Total=8010 [2021-12-18 19:45:50,430 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 478 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:45:50,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 384 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 19:45:50,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-12-18 19:45:50,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1818. [2021-12-18 19:45:50,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1815 states have (on average 1.1140495867768596) internal successors, (2022), 1817 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:50,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 2022 transitions. [2021-12-18 19:45:50,441 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 2022 transitions. Word has length 101 [2021-12-18 19:45:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:45:50,441 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 2022 transitions. [2021-12-18 19:45:50,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.3015873015873014) internal successors, (208), 63 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:50,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 2022 transitions. [2021-12-18 19:45:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-18 19:45:50,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:45:50,442 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:45:50,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-12-18 19:45:50,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-12-18 19:45:50,647 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:45:50,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:45:50,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2110992422, now seen corresponding path program 23 times [2021-12-18 19:45:50,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:45:50,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505243040] [2021-12-18 19:45:50,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:45:50,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:45:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:45:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 231 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:45:51,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:45:51,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505243040] [2021-12-18 19:45:51,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505243040] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:45:51,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125261826] [2021-12-18 19:45:51,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 19:45:51,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:45:51,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:45:51,161 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:45:51,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-12-18 19:45:51,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-18 19:45:51,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:45:51,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-18 19:45:51,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:45:51,517 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:45:51,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:45:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 276 proven. 208 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:45:52,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:45:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 325 proven. 159 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:45:54,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125261826] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:45:54,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:45:54,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 90 [2021-12-18 19:45:54,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799712802] [2021-12-18 19:45:54,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:45:54,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-18 19:45:54,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:45:54,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-18 19:45:54,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1001, Invalid=7189, Unknown=0, NotChecked=0, Total=8190 [2021-12-18 19:45:54,111 INFO L87 Difference]: Start difference. First operand 1818 states and 2022 transitions. Second operand has 91 states, 90 states have (on average 3.2111111111111112) internal successors, (289), 91 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:56,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:45:56,942 INFO L93 Difference]: Finished difference Result 2953 states and 3180 transitions. [2021-12-18 19:45:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-18 19:45:56,943 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 3.2111111111111112) internal successors, (289), 91 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-18 19:45:56,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:45:56,945 INFO L225 Difference]: With dead ends: 2953 [2021-12-18 19:45:56,945 INFO L226 Difference]: Without dead ends: 2863 [2021-12-18 19:45:56,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3727, Invalid=14633, Unknown=0, NotChecked=0, Total=18360 [2021-12-18 19:45:56,946 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 488 mSDsluCounter, 1511 mSDsCounter, 0 mSdLazyCounter, 4172 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 4313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 4172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 19:45:56,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 1575 Invalid, 4313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 4172 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-18 19:45:56,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2021-12-18 19:45:56,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 1944. [2021-12-18 19:45:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1941 states have (on average 1.0994332818134982) internal successors, (2134), 1943 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 2134 transitions. [2021-12-18 19:45:56,959 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 2134 transitions. Word has length 101 [2021-12-18 19:45:56,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:45:56,959 INFO L470 AbstractCegarLoop]: Abstraction has 1944 states and 2134 transitions. [2021-12-18 19:45:56,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 3.2111111111111112) internal successors, (289), 91 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:45:56,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 2134 transitions. [2021-12-18 19:45:56,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-18 19:45:56,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:45:56,961 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:45:56,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-12-18 19:45:57,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-12-18 19:45:57,162 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:45:57,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:45:57,162 INFO L85 PathProgramCache]: Analyzing trace with hash -508623461, now seen corresponding path program 6 times [2021-12-18 19:45:57,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:45:57,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308950484] [2021-12-18 19:45:57,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:45:57,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:45:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:45:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 14 proven. 269 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-18 19:45:58,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:45:58,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308950484] [2021-12-18 19:45:58,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308950484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:45:58,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697499496] [2021-12-18 19:45:58,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:45:58,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:45:58,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:45:58,166 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:45:58,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-12-18 19:45:59,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-18 19:45:59,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:45:59,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 179 conjunts are in the unsatisfiable core [2021-12-18 19:45:59,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:45:59,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:46:00,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:46:00,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-18 19:46:01,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-18 19:46:01,309 INFO L354 Elim1Store]: treesize reduction 9, result has 30.8 percent of original size [2021-12-18 19:46:01,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 12 [2021-12-18 19:46:01,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:46:01,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:46:01,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:46:01,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:46:02,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-18 19:46:02,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:02,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 7 [2021-12-18 19:46:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 60 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:46:02,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:46:02,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:46:02,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-12-18 19:46:04,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:46:04,111 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 48 treesize of output 37 [2021-12-18 19:46:04,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:46:04,118 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 50 treesize of output 52 [2021-12-18 19:46:04,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-18 19:46:04,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-18 19:46:04,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 19:46:04,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 73 [2021-12-18 19:46:07,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:07,209 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 6 treesize of output 4 [2021-12-18 19:46:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 68 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:46:07,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697499496] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:46:07,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:46:07,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 41] total 118 [2021-12-18 19:46:07,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331481044] [2021-12-18 19:46:07,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:46:07,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2021-12-18 19:46:07,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:46:07,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-12-18 19:46:07,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=12961, Unknown=38, NotChecked=0, Total=13806 [2021-12-18 19:46:07,265 INFO L87 Difference]: Start difference. First operand 1944 states and 2134 transitions. Second operand has 118 states, 118 states have (on average 2.4915254237288136) internal successors, (294), 118 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:12,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:46:12,650 INFO L93 Difference]: Finished difference Result 2590 states and 2831 transitions. [2021-12-18 19:46:12,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-18 19:46:12,650 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.4915254237288136) internal successors, (294), 118 states have internal predecessors, (294), 0 states have call successors, (0), 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 102 [2021-12-18 19:46:12,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:46:12,652 INFO L225 Difference]: With dead ends: 2590 [2021-12-18 19:46:12,652 INFO L226 Difference]: Without dead ends: 2276 [2021-12-18 19:46:12,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9255 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=2196, Invalid=28918, Unknown=38, NotChecked=0, Total=31152 [2021-12-18 19:46:12,653 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 769 mSDsluCounter, 2047 mSDsCounter, 0 mSdLazyCounter, 3080 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 2105 SdHoareTripleChecker+Invalid, 5388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 3080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2131 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 19:46:12,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 2105 Invalid, 5388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 3080 Invalid, 0 Unknown, 2131 Unchecked, 1.3s Time] [2021-12-18 19:46:12,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-12-18 19:46:12,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2111. [2021-12-18 19:46:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2108 states have (on average 1.1062618595825426) internal successors, (2332), 2110 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:12,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 2332 transitions. [2021-12-18 19:46:12,664 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 2332 transitions. Word has length 102 [2021-12-18 19:46:12,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:46:12,665 INFO L470 AbstractCegarLoop]: Abstraction has 2111 states and 2332 transitions. [2021-12-18 19:46:12,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.4915254237288136) internal successors, (294), 118 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:12,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 2332 transitions. [2021-12-18 19:46:12,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-18 19:46:12,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:46:12,666 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:46:12,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-12-18 19:46:12,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-12-18 19:46:12,867 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:46:12,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:46:12,867 INFO L85 PathProgramCache]: Analyzing trace with hash 733620552, now seen corresponding path program 27 times [2021-12-18 19:46:12,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:46:12,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702959601] [2021-12-18 19:46:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:46:12,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:46:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:46:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 325 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:46:13,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:46:13,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702959601] [2021-12-18 19:46:13,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702959601] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:46:13,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836594472] [2021-12-18 19:46:13,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:46:13,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:13,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:46:13,446 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:46:13,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-12-18 19:46:13,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-12-18 19:46:13,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:46:13,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-18 19:46:13,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:46:13,894 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:46:13,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:46:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 378 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:46:15,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:46:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 435 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:46:17,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836594472] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:46:17,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:46:17,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 103 [2021-12-18 19:46:17,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062352513] [2021-12-18 19:46:17,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:46:17,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-18 19:46:17,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:46:17,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-18 19:46:17,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1519, Invalid=9193, Unknown=0, NotChecked=0, Total=10712 [2021-12-18 19:46:17,101 INFO L87 Difference]: Start difference. First operand 2111 states and 2332 transitions. Second operand has 104 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:19,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:46:19,437 INFO L93 Difference]: Finished difference Result 4057 states and 4356 transitions. [2021-12-18 19:46:19,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-18 19:46:19,437 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 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 103 [2021-12-18 19:46:19,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:46:19,440 INFO L225 Difference]: With dead ends: 4057 [2021-12-18 19:46:19,440 INFO L226 Difference]: Without dead ends: 4057 [2021-12-18 19:46:19,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5199 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3680, Invalid=14410, Unknown=0, NotChecked=0, Total=18090 [2021-12-18 19:46:19,442 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 806 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 2915 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 3129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 19:46:19,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 1092 Invalid, 3129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2915 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-18 19:46:19,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-12-18 19:46:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 2127. [2021-12-18 19:46:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2124 states have (on average 1.1087570621468927) internal successors, (2355), 2126 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 2355 transitions. [2021-12-18 19:46:19,458 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 2355 transitions. Word has length 103 [2021-12-18 19:46:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:46:19,458 INFO L470 AbstractCegarLoop]: Abstraction has 2127 states and 2355 transitions. [2021-12-18 19:46:19,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 2355 transitions. [2021-12-18 19:46:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-18 19:46:19,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:46:19,460 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:46:19,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-12-18 19:46:19,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-12-18 19:46:19,661 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:46:19,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:46:19,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2105591651, now seen corresponding path program 24 times [2021-12-18 19:46:19,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:46:19,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340769331] [2021-12-18 19:46:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:46:19,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:46:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:46:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 36 proven. 160 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-18 19:46:20,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:46:20,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340769331] [2021-12-18 19:46:20,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340769331] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:46:20,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458925351] [2021-12-18 19:46:20,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 19:46:20,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:20,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:46:20,246 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:46:20,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-12-18 19:46:21,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-18 19:46:21,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:46:21,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-18 19:46:21,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:46:22,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 19:46:22,296 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-12-18 19:46:22,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 18 [2021-12-18 19:46:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 53 proven. 143 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-18 19:46:22,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:46:22,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-18 19:46:22,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:22,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2021-12-18 19:46:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 76 proven. 120 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-18 19:46:23,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458925351] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:46:23,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:46:23,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 67 [2021-12-18 19:46:23,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549000698] [2021-12-18 19:46:23,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:46:23,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-18 19:46:23,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:46:23,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-18 19:46:23,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=3811, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 19:46:23,485 INFO L87 Difference]: Start difference. First operand 2127 states and 2355 transitions. Second operand has 67 states, 67 states have (on average 3.1791044776119404) internal successors, (213), 67 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:46:25,264 INFO L93 Difference]: Finished difference Result 2139 states and 2366 transitions. [2021-12-18 19:46:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 19:46:25,264 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.1791044776119404) internal successors, (213), 67 states have internal predecessors, (213), 0 states have call successors, (0), 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 103 [2021-12-18 19:46:25,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:46:25,266 INFO L225 Difference]: With dead ends: 2139 [2021-12-18 19:46:25,266 INFO L226 Difference]: Without dead ends: 2132 [2021-12-18 19:46:25,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2970 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1677, Invalid=7829, Unknown=0, NotChecked=0, Total=9506 [2021-12-18 19:46:25,266 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 307 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 19:46:25,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 494 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 934 Invalid, 0 Unknown, 61 Unchecked, 0.4s Time] [2021-12-18 19:46:25,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2021-12-18 19:46:25,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2122. [2021-12-18 19:46:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 2119 states have (on average 1.1080698442661634) internal successors, (2348), 2121 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 2348 transitions. [2021-12-18 19:46:25,277 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 2348 transitions. Word has length 103 [2021-12-18 19:46:25,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:46:25,277 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 2348 transitions. [2021-12-18 19:46:25,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.1791044776119404) internal successors, (213), 67 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:25,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 2348 transitions. [2021-12-18 19:46:25,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-18 19:46:25,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:46:25,278 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:46:25,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-12-18 19:46:25,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:25,483 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:46:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:46:25,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1997238937, now seen corresponding path program 20 times [2021-12-18 19:46:25,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:46:25,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448330923] [2021-12-18 19:46:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:46:25,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:46:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:46:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:46:25,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:46:25,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448330923] [2021-12-18 19:46:25,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448330923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:46:25,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535080316] [2021-12-18 19:46:25,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:46:25,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:25,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:46:25,734 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:46:25,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-12-18 19:46:26,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:46:26,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:46:26,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-18 19:46:26,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:46:26,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:26,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 19:46:26,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-18 19:46:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 66 proven. 123 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:46:26,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:46:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 91 proven. 98 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 19:46:27,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535080316] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:46:27,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:46:27,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 56 [2021-12-18 19:46:27,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53402992] [2021-12-18 19:46:27,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:46:27,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-18 19:46:27,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:46:27,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-18 19:46:27,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=2881, Unknown=0, NotChecked=0, Total=3192 [2021-12-18 19:46:27,778 INFO L87 Difference]: Start difference. First operand 2122 states and 2348 transitions. Second operand has 57 states, 56 states have (on average 3.892857142857143) internal successors, (218), 57 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:29,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:46:29,793 INFO L93 Difference]: Finished difference Result 2356 states and 2574 transitions. [2021-12-18 19:46:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 19:46:29,794 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.892857142857143) internal successors, (218), 57 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-18 19:46:29,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:46:29,796 INFO L225 Difference]: With dead ends: 2356 [2021-12-18 19:46:29,796 INFO L226 Difference]: Without dead ends: 2356 [2021-12-18 19:46:29,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1566, Invalid=7176, Unknown=0, NotChecked=0, Total=8742 [2021-12-18 19:46:29,797 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 584 mSDsluCounter, 1305 mSDsCounter, 0 mSdLazyCounter, 2050 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 19:46:29,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 1368 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2050 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-18 19:46:29,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-12-18 19:46:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2137. [2021-12-18 19:46:29,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2134 states have (on average 1.1068416119962512) internal successors, (2362), 2136 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 2362 transitions. [2021-12-18 19:46:29,813 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 2362 transitions. Word has length 104 [2021-12-18 19:46:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:46:29,813 INFO L470 AbstractCegarLoop]: Abstraction has 2137 states and 2362 transitions. [2021-12-18 19:46:29,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.892857142857143) internal successors, (218), 57 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:46:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 2362 transitions. [2021-12-18 19:46:29,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-18 19:46:29,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:46:29,815 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:46:29,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-12-18 19:46:30,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-12-18 19:46:30,023 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:46:30,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:46:30,023 INFO L85 PathProgramCache]: Analyzing trace with hash 634714529, now seen corresponding path program 28 times [2021-12-18 19:46:30,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:46:30,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047449374] [2021-12-18 19:46:30,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:46:30,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:46:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:46:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 227 proven. 463 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:46:33,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:46:33,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047449374] [2021-12-18 19:46:33,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047449374] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:46:33,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176638408] [2021-12-18 19:46:33,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 19:46:33,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:46:33,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:46:33,757 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:46:33,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-12-18 19:46:34,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 19:46:34,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:46:34,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 144 conjunts are in the unsatisfiable core [2021-12-18 19:46:34,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:46:34,085 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:46:34,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:46:35,772 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 13 treesize of output 9 [2021-12-18 19:46:39,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 19:46:39,947 INFO L354 Elim1Store]: treesize reduction 86, result has 52.0 percent of original size [2021-12-18 19:46:39,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 105 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 15 case distinctions, treesize of input 157 treesize of output 155 [2021-12-18 19:46:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 227 proven. 464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:46:49,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:46:53,596 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 224 treesize of output 194 [2021-12-18 19:46:53,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 19:46:53,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 105 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 0 case distinctions, treesize of input 370 treesize of output 312 [2021-12-18 19:47:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 241 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 19:47:05,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176638408] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:47:05,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:47:05,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 54] total 154 [2021-12-18 19:47:05,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295451407] [2021-12-18 19:47:05,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:47:05,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2021-12-18 19:47:05,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:47:05,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2021-12-18 19:47:05,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2263, Invalid=21299, Unknown=0, NotChecked=0, Total=23562 [2021-12-18 19:47:05,337 INFO L87 Difference]: Start difference. First operand 2137 states and 2362 transitions. Second operand has 154 states, 154 states have (on average 1.9610389610389611) internal successors, (302), 154 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:47:27,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:47:27,378 INFO L93 Difference]: Finished difference Result 2788 states and 3080 transitions. [2021-12-18 19:47:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-18 19:47:27,379 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 1.9610389610389611) internal successors, (302), 154 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-18 19:47:27,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:47:27,381 INFO L225 Difference]: With dead ends: 2788 [2021-12-18 19:47:27,381 INFO L226 Difference]: Without dead ends: 2755 [2021-12-18 19:47:27,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 109 SyntacticMatches, 6 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 20986 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=7688, Invalid=57592, Unknown=0, NotChecked=0, Total=65280 [2021-12-18 19:47:27,384 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 941 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 3398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:47:27,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 860 Invalid, 3398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 2487 Invalid, 0 Unknown, 459 Unchecked, 1.6s Time] [2021-12-18 19:47:27,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-12-18 19:47:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2386. [2021-12-18 19:47:27,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2386 states, 2383 states have (on average 1.112463281577843) internal successors, (2651), 2385 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:47:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 2651 transitions. [2021-12-18 19:47:27,397 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 2651 transitions. Word has length 105 [2021-12-18 19:47:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:47:27,397 INFO L470 AbstractCegarLoop]: Abstraction has 2386 states and 2651 transitions. [2021-12-18 19:47:27,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 1.9610389610389611) internal successors, (302), 154 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:47:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 2651 transitions. [2021-12-18 19:47:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-18 19:47:27,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:47:27,399 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:47:27,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-12-18 19:47:27,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:47:27,599 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:47:27,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:47:27,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1904792874, now seen corresponding path program 25 times [2021-12-18 19:47:27,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:47:27,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664359128] [2021-12-18 19:47:27,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:47:27,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:47:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:47:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 86 proven. 212 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:47:27,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:47:27,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664359128] [2021-12-18 19:47:27,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664359128] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:47:27,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486324899] [2021-12-18 19:47:27,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 19:47:27,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:47:27,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:47:27,915 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:47:27,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-12-18 19:47:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:47:28,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-18 19:47:28,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:47:28,220 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:47:28,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:47:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 102 proven. 196 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:47:28,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:47:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 94 proven. 204 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 19:47:29,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486324899] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:47:29,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:47:29,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 68 [2021-12-18 19:47:29,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856378311] [2021-12-18 19:47:29,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:47:29,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-18 19:47:29,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:47:29,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-18 19:47:29,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=3751, Unknown=0, NotChecked=0, Total=4556 [2021-12-18 19:47:29,543 INFO L87 Difference]: Start difference. First operand 2386 states and 2651 transitions. Second operand has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:47:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:47:31,059 INFO L93 Difference]: Finished difference Result 2905 states and 3158 transitions. [2021-12-18 19:47:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-18 19:47:31,060 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-18 19:47:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:47:31,062 INFO L225 Difference]: With dead ends: 2905 [2021-12-18 19:47:31,062 INFO L226 Difference]: Without dead ends: 2652 [2021-12-18 19:47:31,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2727, Invalid=9045, Unknown=0, NotChecked=0, Total=11772 [2021-12-18 19:47:31,063 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 509 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:47:31,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 491 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1520 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:47:31,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-12-18 19:47:31,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2458. [2021-12-18 19:47:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 2455 states have (on average 1.1067209775967413) internal successors, (2717), 2457 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:47:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 2717 transitions. [2021-12-18 19:47:31,078 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 2717 transitions. Word has length 105 [2021-12-18 19:47:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:47:31,078 INFO L470 AbstractCegarLoop]: Abstraction has 2458 states and 2717 transitions. [2021-12-18 19:47:31,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:47:31,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 2717 transitions. [2021-12-18 19:47:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-18 19:47:31,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:47:31,081 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 6, 6, 6, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:47:31,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-12-18 19:47:31,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:47:31,283 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:47:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:47:31,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1355612998, now seen corresponding path program 26 times [2021-12-18 19:47:31,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:47:31,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026332520] [2021-12-18 19:47:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:47:31,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:47:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:47:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 91 proven. 152 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:47:31,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:47:31,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026332520] [2021-12-18 19:47:31,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026332520] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:47:31,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990929444] [2021-12-18 19:47:31,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 19:47:31,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:47:31,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:47:31,620 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:47:31,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-12-18 19:47:31,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 19:47:31,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:47:31,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-18 19:47:31,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:47:31,957 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:47:31,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:47:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 120 proven. 123 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:47:32,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 19:47:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 153 proven. 90 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 19:47:33,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990929444] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 19:47:33,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 19:47:33,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2021-12-18 19:47:33,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533169561] [2021-12-18 19:47:33,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 19:47:33,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-18 19:47:33,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 19:47:33,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-18 19:47:33,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=4246, Unknown=0, NotChecked=0, Total=4830 [2021-12-18 19:47:33,885 INFO L87 Difference]: Start difference. First operand 2458 states and 2717 transitions. Second operand has 70 states, 69 states have (on average 3.63768115942029) internal successors, (251), 70 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:47:34,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 19:47:34,975 INFO L93 Difference]: Finished difference Result 2892 states and 3159 transitions. [2021-12-18 19:47:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-18 19:47:34,976 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.63768115942029) internal successors, (251), 70 states have internal predecessors, (251), 0 states have call successors, (0), 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 107 [2021-12-18 19:47:34,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 19:47:34,978 INFO L225 Difference]: With dead ends: 2892 [2021-12-18 19:47:34,978 INFO L226 Difference]: Without dead ends: 2854 [2021-12-18 19:47:34,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1697, Invalid=7233, Unknown=0, NotChecked=0, Total=8930 [2021-12-18 19:47:34,979 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 300 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 19:47:34,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 702 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 19:47:34,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-12-18 19:47:34,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2453. [2021-12-18 19:47:34,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2450 states have (on average 1.1048979591836734) internal successors, (2707), 2452 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:47:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 2707 transitions. [2021-12-18 19:47:34,991 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 2707 transitions. Word has length 107 [2021-12-18 19:47:34,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 19:47:34,991 INFO L470 AbstractCegarLoop]: Abstraction has 2453 states and 2707 transitions. [2021-12-18 19:47:34,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.63768115942029) internal successors, (251), 70 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 19:47:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 2707 transitions. [2021-12-18 19:47:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-18 19:47:34,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 19:47:34,993 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 19:47:35,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-12-18 19:47:35,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-12-18 19:47:35,194 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-18 19:47:35,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 19:47:35,194 INFO L85 PathProgramCache]: Analyzing trace with hash -665440996, now seen corresponding path program 27 times [2021-12-18 19:47:35,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 19:47:35,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014610982] [2021-12-18 19:47:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 19:47:35,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 19:47:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 19:47:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 276 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 19:47:35,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 19:47:35,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014610982] [2021-12-18 19:47:35,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014610982] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 19:47:35,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136937275] [2021-12-18 19:47:35,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 19:47:35,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 19:47:35,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 19:47:35,728 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 19:47:35,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-12-18 19:47:36,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-18 19:47:36,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 19:47:36,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 124 conjunts are in the unsatisfiable core [2021-12-18 19:47:36,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 19:47:36,407 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 19:47:36,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 19:47:37,067 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 Killed by 15