./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mlceu.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/mlceu.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:33:57,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:33:57,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:33:57,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:33:57,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:33:57,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:33:57,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:33:57,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:33:57,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:33:57,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:33:57,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:33:57,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:33:57,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:33:57,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:33:57,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:33:57,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:33:57,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:33:57,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:33:57,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:33:57,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:33:57,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:33:57,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:33:57,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:33:57,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:33:57,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:33:57,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:33:57,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:33:57,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:33:57,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:33:57,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:33:57,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:33:57,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:33:57,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:33:57,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:33:57,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:33:57,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:33:57,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:33:57,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:33:57,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:33:57,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:33:57,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:33:57,512 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:33:57,530 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:33:57,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:33:57,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:33:57,538 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:33:57,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:33:57,538 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:33:57,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:33:57,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:33:57,539 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:33:57,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:33:57,540 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:33:57,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:33:57,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:33:57,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:33:57,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:33:57,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:33:57,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:33:57,541 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:33:57,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:33:57,542 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:33:57,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:33:57,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:33:57,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:33:57,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:33:57,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:33:57,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:33:57,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:33:57,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:33:57,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:33:57,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:33:57,544 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:33:57,544 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:33:57,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:33:57,544 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:33:57,544 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 [2021-12-15 21:33:57,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:33:57,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:33:57,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:33:57,809 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:33:57,810 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:33:57,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mlceu.c [2021-12-15 21:33:57,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4b1f119d/2acce71badf8440a99187ac536f0f3f9/FLAGb192a4961 [2021-12-15 21:33:58,222 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:33:58,223 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu.c [2021-12-15 21:33:58,231 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4b1f119d/2acce71badf8440a99187ac536f0f3f9/FLAGb192a4961 [2021-12-15 21:33:58,246 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4b1f119d/2acce71badf8440a99187ac536f0f3f9 [2021-12-15 21:33:58,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:33:58,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:33:58,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:33:58,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:33:58,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:33:58,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:33:58" (1/1) ... [2021-12-15 21:33:58,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515b7782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:58, skipping insertion in model container [2021-12-15 21:33:58,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:33:58" (1/1) ... [2021-12-15 21:33:58,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:33:58,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:33:58,432 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu.c[396,409] [2021-12-15 21:33:58,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:33:58,453 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:33:58,463 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mlceu.c[396,409] [2021-12-15 21:33:58,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:33:58,487 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:33:58,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:58 WrapperNode [2021-12-15 21:33:58,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:33:58,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:33:58,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:33:58,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:33:58,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:58" (1/1) ... [2021-12-15 21:33:58,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:58" (1/1) ... [2021-12-15 21:33:58,519 INFO L137 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2021-12-15 21:33:58,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:33:58,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:33:58,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:33:58,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:33:58,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:58" (1/1) ... [2021-12-15 21:33:58,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:58" (1/1) ... [2021-12-15 21:33:58,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:58" (1/1) ... [2021-12-15 21:33:58,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:58" (1/1) ... [2021-12-15 21:33:58,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:58" (1/1) ... [2021-12-15 21:33:58,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:58" (1/1) ... [2021-12-15 21:33:58,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:58" (1/1) ... [2021-12-15 21:33:58,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:33:58,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:33:58,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:33:58,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:33:58,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:58" (1/1) ... [2021-12-15 21:33:58,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:33:58,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:33:58,582 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 21:33:58,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 21:33:58,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:33:58,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:33:58,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:33:58,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 21:33:58,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:33:58,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:33:58,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:33:58,664 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:33:58,665 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:33:58,785 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:33:58,789 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:33:58,790 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 21:33:58,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:33:58 BoogieIcfgContainer [2021-12-15 21:33:58,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:33:58,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:33:58,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:33:58,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:33:58,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:33:58" (1/3) ... [2021-12-15 21:33:58,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315f8e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:33:58, skipping insertion in model container [2021-12-15 21:33:58,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:33:58" (2/3) ... [2021-12-15 21:33:58,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315f8e8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:33:58, skipping insertion in model container [2021-12-15 21:33:58,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:33:58" (3/3) ... [2021-12-15 21:33:58,798 INFO L111 eAbstractionObserver]: Analyzing ICFG mlceu.c [2021-12-15 21:33:58,802 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:33:58,802 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:33:58,854 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:33:58,859 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 21:33:58,859 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:33:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 21:33:58,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:33:58,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:33:58,896 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:33:58,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:33:58,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1096717866, now seen corresponding path program 1 times [2021-12-15 21:33:58,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:33:58,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366809183] [2021-12-15 21:33:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:33:58,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:33:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:33:59,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:33:59,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:33:59,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366809183] [2021-12-15 21:33:59,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366809183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:33:59,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:33:59,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 21:33:59,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977608536] [2021-12-15 21:33:59,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:33:59,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 21:33:59,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:33:59,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 21:33:59,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:33:59,077 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:59,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:33:59,090 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-12-15 21:33:59,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 21:33:59,091 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-15 21:33:59,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:33:59,097 INFO L225 Difference]: With dead ends: 34 [2021-12-15 21:33:59,098 INFO L226 Difference]: Without dead ends: 15 [2021-12-15 21:33:59,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:33:59,105 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:33:59,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:33:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-15 21:33:59,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-15 21:33:59,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-12-15 21:33:59,134 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2021-12-15 21:33:59,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:33:59,134 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-12-15 21:33:59,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:59,135 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-12-15 21:33:59,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 21:33:59,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:33:59,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:33:59,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:33:59,138 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:33:59,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:33:59,141 INFO L85 PathProgramCache]: Analyzing trace with hash 678289496, now seen corresponding path program 1 times [2021-12-15 21:33:59,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:33:59,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821913345] [2021-12-15 21:33:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:33:59,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:33:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:33:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:33:59,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:33:59,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821913345] [2021-12-15 21:33:59,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821913345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:33:59,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:33:59,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:33:59,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740826831] [2021-12-15 21:33:59,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:33:59,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:33:59,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:33:59,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:33:59,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:33:59,239 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:33:59,278 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-12-15 21:33:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:33:59,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-15 21:33:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:33:59,280 INFO L225 Difference]: With dead ends: 34 [2021-12-15 21:33:59,280 INFO L226 Difference]: Without dead ends: 24 [2021-12-15 21:33:59,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:33:59,286 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:33:59,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:33:59,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-15 21:33:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2021-12-15 21:33:59,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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) [2021-12-15 21:33:59,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-15 21:33:59,297 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-12-15 21:33:59,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:33:59,298 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-15 21:33:59,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-15 21:33:59,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 21:33:59,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:33:59,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:33:59,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 21:33:59,303 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:33:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:33:59,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1190752748, now seen corresponding path program 1 times [2021-12-15 21:33:59,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:33:59,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100954902] [2021-12-15 21:33:59,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:33:59,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:33:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:33:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:33:59,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:33:59,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100954902] [2021-12-15 21:33:59,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100954902] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:33:59,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878578512] [2021-12-15 21:33:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:33:59,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:33:59,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:33:59,492 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:33:59,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:33:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:33:59,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 21:33:59,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:33:59,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 21:33:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:33:59,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:33:59,750 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 14 treesize of output 12 [2021-12-15 21:33:59,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-15 21:33:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:33:59,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878578512] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:33:59,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:33:59,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-15 21:33:59,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714919906] [2021-12-15 21:33:59,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:33:59,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 21:33:59,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:33:59,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 21:33:59,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-15 21:33:59,791 INFO L87 Difference]: Start difference. First operand 17 states and 19 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) [2021-12-15 21:33:59,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:33:59,883 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-12-15 21:33:59,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 21:33:59,883 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 13 [2021-12-15 21:33:59,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:33:59,884 INFO L225 Difference]: With dead ends: 26 [2021-12-15 21:33:59,884 INFO L226 Difference]: Without dead ends: 24 [2021-12-15 21:33:59,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:33:59,885 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:33:59,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 46 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:33:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-15 21:33:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2021-12-15 21:33:59,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:33:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-12-15 21:33:59,889 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2021-12-15 21:33:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:33:59,889 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-15 21:33:59,889 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) [2021-12-15 21:33:59,889 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-12-15 21:33:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 21:33:59,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:33:59,890 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:33:59,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:00,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:00,107 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:00,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:00,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1891500962, now seen corresponding path program 1 times [2021-12-15 21:34:00,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:00,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605681878] [2021-12-15 21:34:00,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:00,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:00,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:00,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605681878] [2021-12-15 21:34:00,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605681878] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:00,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358727298] [2021-12-15 21:34:00,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:00,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:00,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:00,171 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:00,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:34:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:00,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 21:34:00,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:00,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:00,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358727298] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:00,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:00,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-15 21:34:00,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041065778] [2021-12-15 21:34:00,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:00,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 21:34:00,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:00,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 21:34:00,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:34:00,366 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:00,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:00,435 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-12-15 21:34:00,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 21:34:00,436 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-15 21:34:00,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:00,436 INFO L225 Difference]: With dead ends: 49 [2021-12-15 21:34:00,436 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 21:34:00,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-15 21:34:00,439 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:00,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 45 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:34:00,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 21:34:00,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2021-12-15 21:34:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-15 21:34:00,444 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2021-12-15 21:34:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:00,444 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-15 21:34:00,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-15 21:34:00,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 21:34:00,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:00,444 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:00,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:00,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-15 21:34:00,663 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:00,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:00,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2006236274, now seen corresponding path program 2 times [2021-12-15 21:34:00,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:00,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882477749] [2021-12-15 21:34:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:00,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:00,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:00,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882477749] [2021-12-15 21:34:00,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882477749] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:00,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354786189] [2021-12-15 21:34:00,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:34:00,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:00,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:00,763 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:00,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:34:00,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:34:00,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:00,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 21:34:00,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:00,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:00,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:00,999 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 16 treesize of output 14 [2021-12-15 21:34:01,001 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 28 treesize of output 24 [2021-12-15 21:34:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:01,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354786189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:01,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:01,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2021-12-15 21:34:01,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975020831] [2021-12-15 21:34:01,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:01,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 21:34:01,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:01,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 21:34:01,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:34:01,025 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:01,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:01,133 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-12-15 21:34:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 21:34:01,133 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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 20 [2021-12-15 21:34:01,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:01,134 INFO L225 Difference]: With dead ends: 33 [2021-12-15 21:34:01,134 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 21:34:01,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-12-15 21:34:01,135 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:01,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 54 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:34:01,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 21:34:01,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-12-15 21:34:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-12-15 21:34:01,139 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2021-12-15 21:34:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:01,139 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-12-15 21:34:01,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-12-15 21:34:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 21:34:01,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:01,140 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:01,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:01,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:01,356 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:01,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:01,356 INFO L85 PathProgramCache]: Analyzing trace with hash 466236484, now seen corresponding path program 3 times [2021-12-15 21:34:01,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:01,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300070555] [2021-12-15 21:34:01,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:01,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:01,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:01,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300070555] [2021-12-15 21:34:01,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300070555] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:01,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772838501] [2021-12-15 21:34:01,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:34:01,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:01,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:01,421 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:01,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:34:01,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 21:34:01,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:01,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 21:34:01,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:01,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:01,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772838501] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:01,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:01,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 21:34:01,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480290288] [2021-12-15 21:34:01,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:01,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 21:34:01,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:01,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 21:34:01,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:34:01,612 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-12-15 21:34:01,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:01,683 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-12-15 21:34:01,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 21:34:01,684 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 24 [2021-12-15 21:34:01,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:01,684 INFO L225 Difference]: With dead ends: 64 [2021-12-15 21:34:01,684 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 21:34:01,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-15 21:34:01,685 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:01,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 57 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:34:01,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 21:34:01,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-12-15 21:34:01,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:01,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-15 21:34:01,689 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2021-12-15 21:34:01,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:01,689 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-15 21:34:01,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-12-15 21:34:01,689 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-15 21:34:01,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 21:34:01,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:01,690 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:01,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:01,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:01,906 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:01,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:01,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1524796712, now seen corresponding path program 4 times [2021-12-15 21:34:01,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:01,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828317007] [2021-12-15 21:34:01,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:01,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:02,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:02,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828317007] [2021-12-15 21:34:02,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828317007] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:02,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577964713] [2021-12-15 21:34:02,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:34:02,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:02,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:02,096 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:02,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 21:34:02,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:34:02,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:02,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-15 21:34:02,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:02,180 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 13 treesize of output 9 [2021-12-15 21:34:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:02,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:02,413 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 16 treesize of output 14 [2021-12-15 21:34:02,414 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 28 treesize of output 24 [2021-12-15 21:34:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:02,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577964713] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:02,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:02,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-12-15 21:34:02,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098861587] [2021-12-15 21:34:02,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:02,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-15 21:34:02,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:02,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-15 21:34:02,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-15 21:34:02,441 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:02,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:02,633 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-12-15 21:34:02,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-15 21:34:02,634 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-15 21:34:02,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:02,635 INFO L225 Difference]: With dead ends: 40 [2021-12-15 21:34:02,635 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 21:34:02,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-12-15 21:34:02,636 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:02,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 101 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:34:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 21:34:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2021-12-15 21:34:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 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) [2021-12-15 21:34:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-12-15 21:34:02,641 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2021-12-15 21:34:02,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:02,641 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-12-15 21:34:02,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:02,642 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-12-15 21:34:02,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 21:34:02,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:02,642 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:02,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:02,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:02,843 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:02,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:02,843 INFO L85 PathProgramCache]: Analyzing trace with hash 702525070, now seen corresponding path program 5 times [2021-12-15 21:34:02,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:02,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916390507] [2021-12-15 21:34:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:02,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:02,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:02,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916390507] [2021-12-15 21:34:02,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916390507] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:02,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86341093] [2021-12-15 21:34:02,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:34:02,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:02,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:02,907 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:02,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 21:34:02,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 21:34:02,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:02,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 21:34:02,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:03,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:03,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86341093] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:03,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:03,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-15 21:34:03,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773031920] [2021-12-15 21:34:03,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:03,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 21:34:03,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:03,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 21:34:03,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-15 21:34:03,106 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) [2021-12-15 21:34:03,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:03,175 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-12-15 21:34:03,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 21:34:03,176 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) Word has length 31 [2021-12-15 21:34:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:03,177 INFO L225 Difference]: With dead ends: 79 [2021-12-15 21:34:03,177 INFO L226 Difference]: Without dead ends: 45 [2021-12-15 21:34:03,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-15 21:34:03,178 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:03,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 63 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:34:03,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-15 21:34:03,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-12-15 21:34:03,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:03,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-12-15 21:34:03,181 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2021-12-15 21:34:03,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:03,181 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-12-15 21:34:03,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 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) [2021-12-15 21:34:03,182 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-12-15 21:34:03,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 21:34:03,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:03,182 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:03,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:03,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:03,388 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:03,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:03,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1539792518, now seen corresponding path program 6 times [2021-12-15 21:34:03,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:03,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014656772] [2021-12-15 21:34:03,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:03,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:03,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:03,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014656772] [2021-12-15 21:34:03,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014656772] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:03,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607434536] [2021-12-15 21:34:03,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:34:03,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:03,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:03,593 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:03,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 21:34:03,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-15 21:34:03,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:03,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 21:34:03,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:03,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:04,031 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-15 21:34:04,031 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 44 treesize of output 23 [2021-12-15 21:34:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:04,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:04,367 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 18 treesize of output 16 [2021-12-15 21:34:04,370 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 34 treesize of output 28 [2021-12-15 21:34:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:04,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607434536] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:04,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:04,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 31 [2021-12-15 21:34:04,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142289492] [2021-12-15 21:34:04,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:04,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 21:34:04,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:04,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 21:34:04,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2021-12-15 21:34:04,397 INFO L87 Difference]: Start difference. First operand 36 states and 38 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) [2021-12-15 21:34:04,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:04,685 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-12-15 21:34:04,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 21:34:04,685 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 34 [2021-12-15 21:34:04,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:04,686 INFO L225 Difference]: With dead ends: 59 [2021-12-15 21:34:04,686 INFO L226 Difference]: Without dead ends: 39 [2021-12-15 21:34:04,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=401, Invalid=1855, Unknown=0, NotChecked=0, Total=2256 [2021-12-15 21:34:04,687 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:04,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 102 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 71 Unchecked, 0.0s Time] [2021-12-15 21:34:04,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-15 21:34:04,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-12-15 21:34:04,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-12-15 21:34:04,690 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2021-12-15 21:34:04,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:04,690 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-12-15 21:34:04,691 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) [2021-12-15 21:34:04,691 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-12-15 21:34:04,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 21:34:04,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:04,691 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:04,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:04,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:04,896 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:04,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1107758196, now seen corresponding path program 1 times [2021-12-15 21:34:04,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:04,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987743080] [2021-12-15 21:34:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:04,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 21:34:04,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:04,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987743080] [2021-12-15 21:34:04,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987743080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:04,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061294169] [2021-12-15 21:34:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:04,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:04,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:04,965 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:04,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 21:34:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:05,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 21:34:05,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 21:34:05,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 21:34:05,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061294169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:05,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:05,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-15 21:34:05,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580981168] [2021-12-15 21:34:05,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:05,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 21:34:05,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:05,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 21:34:05,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-15 21:34:05,155 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-12-15 21:34:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:05,224 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2021-12-15 21:34:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 21:34:05,224 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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 37 [2021-12-15 21:34:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:05,227 INFO L225 Difference]: With dead ends: 124 [2021-12-15 21:34:05,227 INFO L226 Difference]: Without dead ends: 104 [2021-12-15 21:34:05,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-15 21:34:05,228 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 133 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:05,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 57 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:34:05,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-15 21:34:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 54. [2021-12-15 21:34:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-12-15 21:34:05,254 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 37 [2021-12-15 21:34:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:05,254 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-12-15 21:34:05,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 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) [2021-12-15 21:34:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-12-15 21:34:05,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 21:34:05,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:05,256 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:05,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:05,474 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,SelfDestructingSolverStorable9 [2021-12-15 21:34:05,474 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:05,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:05,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1498265358, now seen corresponding path program 7 times [2021-12-15 21:34:05,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:05,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930777839] [2021-12-15 21:34:05,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:05,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:05,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:05,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930777839] [2021-12-15 21:34:05,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930777839] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:05,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594677193] [2021-12-15 21:34:05,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:34:05,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:05,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:05,724 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:05,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 21:34:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:05,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-15 21:34:05,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:05,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:05,884 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:34:05,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 21:34:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:06,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:08,191 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_108| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_108| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_155 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_108| 4)) v_ArrVal_155) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) 0)))) is different from false [2021-12-15 21:34:08,226 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 23 treesize of output 21 [2021-12-15 21:34:08,229 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 78 treesize of output 74 [2021-12-15 21:34:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-15 21:34:08,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594677193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:08,310 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:08,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 31 [2021-12-15 21:34:08,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224787579] [2021-12-15 21:34:08,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:08,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 21:34:08,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:08,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 21:34:08,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=755, Unknown=1, NotChecked=56, Total=930 [2021-12-15 21:34:08,312 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 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) [2021-12-15 21:34:10,429 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* 4 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (<= .cse0 12) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_108| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_108| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_155 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_108| 4)) v_ArrVal_155) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) 0)))) (< 11 .cse0))) is different from false [2021-12-15 21:34:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:10,679 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-12-15 21:34:10,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 21:34:10,680 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 21:34:10,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:10,680 INFO L225 Difference]: With dead ends: 64 [2021-12-15 21:34:10,680 INFO L226 Difference]: Without dead ends: 62 [2021-12-15 21:34:10,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=235, Invalid=1493, Unknown=2, NotChecked=162, Total=1892 [2021-12-15 21:34:10,682 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 79 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:10,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 171 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 384 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2021-12-15 21:34:10,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-15 21:34:10,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2021-12-15 21:34:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 57 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) [2021-12-15 21:34:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-12-15 21:34:10,686 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 37 [2021-12-15 21:34:10,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:10,686 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-12-15 21:34:10,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 31 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) [2021-12-15 21:34:10,687 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-12-15 21:34:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 21:34:10,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:10,687 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:10,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:10,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:10,906 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:10,907 INFO L85 PathProgramCache]: Analyzing trace with hash 122087364, now seen corresponding path program 8 times [2021-12-15 21:34:10,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:10,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195435544] [2021-12-15 21:34:10,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:10,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:11,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:11,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195435544] [2021-12-15 21:34:11,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195435544] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:11,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737402875] [2021-12-15 21:34:11,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:34:11,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:11,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:11,044 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:11,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 21:34:11,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:34:11,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:11,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-15 21:34:11,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:11,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:11,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:11,332 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 16 treesize of output 14 [2021-12-15 21:34:11,334 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 28 treesize of output 24 [2021-12-15 21:34:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:11,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737402875] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:11,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:11,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 20 [2021-12-15 21:34:11,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764410857] [2021-12-15 21:34:11,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:11,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-15 21:34:11,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:11,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-15 21:34:11,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-12-15 21:34:11,378 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:11,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:11,643 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-12-15 21:34:11,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 21:34:11,644 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-15 21:34:11,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:11,644 INFO L225 Difference]: With dead ends: 68 [2021-12-15 21:34:11,644 INFO L226 Difference]: Without dead ends: 66 [2021-12-15 21:34:11,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 21:34:11,645 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:11,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 169 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:34:11,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-15 21:34:11,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2021-12-15 21:34:11,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2021-12-15 21:34:11,649 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 41 [2021-12-15 21:34:11,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:11,649 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2021-12-15 21:34:11,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:11,649 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2021-12-15 21:34:11,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 21:34:11,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:11,650 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:11,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-15 21:34:11,850 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,SelfDestructingSolverStorable11 [2021-12-15 21:34:11,850 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:11,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1087582854, now seen corresponding path program 9 times [2021-12-15 21:34:11,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:11,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429205808] [2021-12-15 21:34:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:11,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:11,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:11,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429205808] [2021-12-15 21:34:11,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429205808] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:11,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250928702] [2021-12-15 21:34:11,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:34:11,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:11,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:11,938 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:11,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 21:34:12,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-15 21:34:12,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:12,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 21:34:12,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:12,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:12,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250928702] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:12,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:12,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-12-15 21:34:12,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213735041] [2021-12-15 21:34:12,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:12,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 21:34:12,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:12,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 21:34:12,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-15 21:34:12,244 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 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) [2021-12-15 21:34:12,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:12,351 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2021-12-15 21:34:12,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 21:34:12,352 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 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 45 [2021-12-15 21:34:12,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:12,352 INFO L225 Difference]: With dead ends: 98 [2021-12-15 21:34:12,352 INFO L226 Difference]: Without dead ends: 70 [2021-12-15 21:34:12,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-12-15 21:34:12,353 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 82 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:12,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 106 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:34:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-15 21:34:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2021-12-15 21:34:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 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) [2021-12-15 21:34:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-12-15 21:34:12,370 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 45 [2021-12-15 21:34:12,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:12,370 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-12-15 21:34:12,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 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) [2021-12-15 21:34:12,370 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-12-15 21:34:12,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-15 21:34:12,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:12,371 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:12,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:12,591 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,SelfDestructingSolverStorable12 [2021-12-15 21:34:12,591 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:12,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:12,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2143538330, now seen corresponding path program 10 times [2021-12-15 21:34:12,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:12,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867909293] [2021-12-15 21:34:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:12,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:12,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867909293] [2021-12-15 21:34:12,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867909293] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:12,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758137532] [2021-12-15 21:34:12,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:34:12,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:12,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:12,746 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:12,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 21:34:12,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:34:12,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:12,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-15 21:34:12,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:12,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:13,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:13,109 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 16 treesize of output 14 [2021-12-15 21:34:13,110 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 28 treesize of output 24 [2021-12-15 21:34:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:13,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758137532] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:13,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:13,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 23 [2021-12-15 21:34:13,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102274822] [2021-12-15 21:34:13,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:13,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-15 21:34:13,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:13,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-15 21:34:13,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-12-15 21:34:13,166 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:13,497 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2021-12-15 21:34:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-15 21:34:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-15 21:34:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:13,498 INFO L225 Difference]: With dead ends: 72 [2021-12-15 21:34:13,498 INFO L226 Difference]: Without dead ends: 70 [2021-12-15 21:34:13,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 21:34:13,499 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:13,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 227 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:34:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-15 21:34:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-12-15 21:34:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 65 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2021-12-15 21:34:13,503 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 48 [2021-12-15 21:34:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:13,503 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2021-12-15 21:34:13,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2021-12-15 21:34:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-15 21:34:13,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:13,504 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:13,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:13,716 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,SelfDestructingSolverStorable13 [2021-12-15 21:34:13,717 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:13,717 INFO L85 PathProgramCache]: Analyzing trace with hash -546342884, now seen corresponding path program 11 times [2021-12-15 21:34:13,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:13,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263451971] [2021-12-15 21:34:13,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:13,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 51 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:13,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:13,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263451971] [2021-12-15 21:34:13,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263451971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:13,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830001621] [2021-12-15 21:34:13,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:34:13,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:13,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:13,823 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:13,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 21:34:13,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-15 21:34:13,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:13,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 21:34:13,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:14,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 72 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:14,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830001621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:14,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:14,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-12-15 21:34:14,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502429573] [2021-12-15 21:34:14,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:14,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-15 21:34:14,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:14,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-15 21:34:14,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-12-15 21:34:14,178 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 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) [2021-12-15 21:34:14,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:14,314 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2021-12-15 21:34:14,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 21:34:14,314 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-15 21:34:14,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:14,315 INFO L225 Difference]: With dead ends: 106 [2021-12-15 21:34:14,315 INFO L226 Difference]: Without dead ends: 74 [2021-12-15 21:34:14,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 21:34:14,316 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:14,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 115 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:34:14,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-15 21:34:14,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-12-15 21:34:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 65 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2021-12-15 21:34:14,320 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 52 [2021-12-15 21:34:14,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:14,320 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2021-12-15 21:34:14,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 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) [2021-12-15 21:34:14,320 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2021-12-15 21:34:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 21:34:14,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:14,320 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:14,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:14,521 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,SelfDestructingSolverStorable14 [2021-12-15 21:34:14,521 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:14,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:14,522 INFO L85 PathProgramCache]: Analyzing trace with hash 969527472, now seen corresponding path program 12 times [2021-12-15 21:34:14,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:14,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136665821] [2021-12-15 21:34:14,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:14,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:14,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:14,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136665821] [2021-12-15 21:34:14,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136665821] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:14,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444093447] [2021-12-15 21:34:14,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:34:14,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:14,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:14,745 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:14,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 21:34:14,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-15 21:34:14,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:14,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 21:34:14,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:15,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:15,622 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-15 21:34:15,622 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 44 treesize of output 23 [2021-12-15 21:34:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 66 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:15,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:16,190 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 18 treesize of output 16 [2021-12-15 21:34:16,195 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 34 treesize of output 28 [2021-12-15 21:34:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:16,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444093447] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:16,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:16,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 47 [2021-12-15 21:34:16,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723466859] [2021-12-15 21:34:16,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:16,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-15 21:34:16,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:16,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-15 21:34:16,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2021-12-15 21:34:16,231 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:16,790 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-12-15 21:34:16,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-15 21:34:16,790 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-15 21:34:16,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:16,791 INFO L225 Difference]: With dead ends: 98 [2021-12-15 21:34:16,791 INFO L226 Difference]: Without dead ends: 66 [2021-12-15 21:34:16,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=554, Invalid=4138, Unknown=0, NotChecked=0, Total=4692 [2021-12-15 21:34:16,792 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:16,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 272 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 239 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2021-12-15 21:34:16,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-15 21:34:16,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-15 21:34:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-15 21:34:16,798 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 55 [2021-12-15 21:34:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:16,798 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-15 21:34:16,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:16,798 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-15 21:34:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-15 21:34:16,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:16,799 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:16,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:16,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:16,999 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:17,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:17,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1317814372, now seen corresponding path program 13 times [2021-12-15 21:34:17,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:17,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152730351] [2021-12-15 21:34:17,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:17,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:17,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:17,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152730351] [2021-12-15 21:34:17,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152730351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:17,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125446472] [2021-12-15 21:34:17,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:34:17,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:17,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:17,224 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:17,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-15 21:34:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:17,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-15 21:34:17,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:17,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:17,409 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:34:17,410 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 27 treesize of output 26 [2021-12-15 21:34:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:17,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:17,772 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 16 treesize of output 14 [2021-12-15 21:34:17,773 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 28 treesize of output 24 [2021-12-15 21:34:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:17,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125446472] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:17,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:17,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 29 [2021-12-15 21:34:17,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242564293] [2021-12-15 21:34:17,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:17,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 21:34:17,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:17,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 21:34:17,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-12-15 21:34:17,841 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 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) [2021-12-15 21:34:18,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:18,390 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-12-15 21:34:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-15 21:34:18,390 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 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 58 [2021-12-15 21:34:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:18,391 INFO L225 Difference]: With dead ends: 118 [2021-12-15 21:34:18,391 INFO L226 Difference]: Without dead ends: 116 [2021-12-15 21:34:18,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=247, Invalid=2509, Unknown=0, NotChecked=0, Total=2756 [2021-12-15 21:34:18,392 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 81 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:18,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 386 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 757 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2021-12-15 21:34:18,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-15 21:34:18,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 71. [2021-12-15 21:34:18,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:18,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-12-15 21:34:18,395 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 58 [2021-12-15 21:34:18,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:18,396 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-12-15 21:34:18,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 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) [2021-12-15 21:34:18,396 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-12-15 21:34:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 21:34:18,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:18,396 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:18,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:18,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 21:34:18,597 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:18,597 INFO L85 PathProgramCache]: Analyzing trace with hash 432429360, now seen corresponding path program 14 times [2021-12-15 21:34:18,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:18,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71179453] [2021-12-15 21:34:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:18,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:18,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:18,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71179453] [2021-12-15 21:34:18,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71179453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:18,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849372862] [2021-12-15 21:34:18,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:34:18,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:18,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:18,878 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:18,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-15 21:34:18,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:34:18,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:18,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-15 21:34:18,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:19,020 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 15 treesize of output 11 [2021-12-15 21:34:19,054 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:34:19,054 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 25 treesize of output 24 [2021-12-15 21:34:19,088 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:34:19,088 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 25 treesize of output 24 [2021-12-15 21:34:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:19,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:19,475 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 16 treesize of output 14 [2021-12-15 21:34:19,477 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 28 treesize of output 24 [2021-12-15 21:34:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 188 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:34:19,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849372862] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:19,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:19,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 30 [2021-12-15 21:34:19,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688071509] [2021-12-15 21:34:19,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:19,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-15 21:34:19,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:19,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-15 21:34:19,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-12-15 21:34:19,540 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 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) [2021-12-15 21:34:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:20,102 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2021-12-15 21:34:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-15 21:34:20,103 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 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 61 [2021-12-15 21:34:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:20,103 INFO L225 Difference]: With dead ends: 108 [2021-12-15 21:34:20,103 INFO L226 Difference]: Without dead ends: 106 [2021-12-15 21:34:20,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=226, Invalid=2126, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 21:34:20,104 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:20,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 410 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 21:34:20,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-15 21:34:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2021-12-15 21:34:20,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 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) [2021-12-15 21:34:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-12-15 21:34:20,108 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 61 [2021-12-15 21:34:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:20,109 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-12-15 21:34:20,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 30 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) [2021-12-15 21:34:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-12-15 21:34:20,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-15 21:34:20,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:20,109 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:20,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:20,319 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,SelfDestructingSolverStorable17 [2021-12-15 21:34:20,319 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:20,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:20,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1425668434, now seen corresponding path program 15 times [2021-12-15 21:34:20,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:20,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831165515] [2021-12-15 21:34:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:20,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:20,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:20,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831165515] [2021-12-15 21:34:20,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831165515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:20,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268255578] [2021-12-15 21:34:20,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:34:20,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:20,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:20,533 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:20,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-15 21:34:20,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-15 21:34:20,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:20,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-15 21:34:20,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:20,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:21,467 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-15 21:34:21,468 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 44 treesize of output 23 [2021-12-15 21:34:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 91 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:21,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:22,329 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 18 treesize of output 16 [2021-12-15 21:34:22,334 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 34 treesize of output 28 [2021-12-15 21:34:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:22,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268255578] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:22,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:22,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2021-12-15 21:34:22,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574250653] [2021-12-15 21:34:22,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:22,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-15 21:34:22,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:22,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-15 21:34:22,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2322, Unknown=1, NotChecked=0, Total=2652 [2021-12-15 21:34:22,373 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:23,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:23,205 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2021-12-15 21:34:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-15 21:34:23,205 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-15 21:34:23,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:23,206 INFO L225 Difference]: With dead ends: 107 [2021-12-15 21:34:23,206 INFO L226 Difference]: Without dead ends: 71 [2021-12-15 21:34:23,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=781, Invalid=6190, Unknown=1, NotChecked=0, Total=6972 [2021-12-15 21:34:23,208 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:23,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 394 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 332 Invalid, 0 Unknown, 337 Unchecked, 0.1s Time] [2021-12-15 21:34:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-15 21:34:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-12-15 21:34:23,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2021-12-15 21:34:23,214 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 62 [2021-12-15 21:34:23,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:23,214 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2021-12-15 21:34:23,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.923076923076923) internal successors, (152), 52 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:23,214 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2021-12-15 21:34:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 21:34:23,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:23,215 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:23,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:23,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:23,416 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:23,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1199724314, now seen corresponding path program 16 times [2021-12-15 21:34:23,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:23,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123219875] [2021-12-15 21:34:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:23,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:23,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:23,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123219875] [2021-12-15 21:34:23,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123219875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:23,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814833021] [2021-12-15 21:34:23,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:34:23,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:23,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:23,660 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:23,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-15 21:34:23,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:34:23,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:23,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-15 21:34:23,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:23,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:23,846 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:34:23,847 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 27 treesize of output 26 [2021-12-15 21:34:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:24,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:24,270 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 16 treesize of output 14 [2021-12-15 21:34:24,271 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 28 treesize of output 24 [2021-12-15 21:34:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 0 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:24,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814833021] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:24,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:24,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 22] total 32 [2021-12-15 21:34:24,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969441432] [2021-12-15 21:34:24,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:24,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-15 21:34:24,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:24,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-15 21:34:24,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-12-15 21:34:24,345 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:24,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:24,909 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2021-12-15 21:34:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-15 21:34:24,909 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have 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 [2021-12-15 21:34:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:24,910 INFO L225 Difference]: With dead ends: 118 [2021-12-15 21:34:24,910 INFO L226 Difference]: Without dead ends: 116 [2021-12-15 21:34:24,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=2315, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 21:34:24,911 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 52 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:24,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 515 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 930 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2021-12-15 21:34:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-15 21:34:24,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-12-15 21:34:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-12-15 21:34:24,917 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 65 [2021-12-15 21:34:24,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:24,918 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-12-15 21:34:24,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-12-15 21:34:24,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 21:34:24,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:24,919 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:24,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:25,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:25,135 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:25,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:25,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1374347474, now seen corresponding path program 17 times [2021-12-15 21:34:25,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:25,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494776022] [2021-12-15 21:34:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:25,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:25,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:25,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494776022] [2021-12-15 21:34:25,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494776022] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:25,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642385768] [2021-12-15 21:34:25,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:34:25,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:25,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:25,402 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:25,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-15 21:34:25,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-15 21:34:25,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:25,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-15 21:34:25,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:25,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:25,637 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:34:25,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 21:34:25,670 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:34:25,671 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 25 treesize of output 24 [2021-12-15 21:34:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 2 proven. 241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:25,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:26,161 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 16 treesize of output 14 [2021-12-15 21:34:26,162 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 28 treesize of output 24 [2021-12-15 21:34:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:34:26,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642385768] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:26,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:26,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 33 [2021-12-15 21:34:26,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90355505] [2021-12-15 21:34:26,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:26,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-15 21:34:26,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:26,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-15 21:34:26,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-12-15 21:34:26,255 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:26,946 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2021-12-15 21:34:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-15 21:34:26,947 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 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 68 [2021-12-15 21:34:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:26,948 INFO L225 Difference]: With dead ends: 116 [2021-12-15 21:34:26,948 INFO L226 Difference]: Without dead ends: 114 [2021-12-15 21:34:26,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 116 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=2614, Unknown=0, NotChecked=0, Total=2862 [2021-12-15 21:34:26,949 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:26,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 521 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 21:34:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-15 21:34:26,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 74. [2021-12-15 21:34:26,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:26,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-12-15 21:34:26,955 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 68 [2021-12-15 21:34:26,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:26,955 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-12-15 21:34:26,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:26,956 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-12-15 21:34:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 21:34:26,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:26,956 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:26,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:27,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:27,166 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:27,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2030424676, now seen corresponding path program 18 times [2021-12-15 21:34:27,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:27,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507932951] [2021-12-15 21:34:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:27,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:27,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:27,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507932951] [2021-12-15 21:34:27,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507932951] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:27,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970888861] [2021-12-15 21:34:27,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:34:27,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:27,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:27,426 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:27,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-15 21:34:27,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-15 21:34:27,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:27,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-15 21:34:27,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:27,881 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 15 treesize of output 11 [2021-12-15 21:34:28,561 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-15 21:34:28,561 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 44 treesize of output 23 [2021-12-15 21:34:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 120 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:28,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:29,342 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 18 treesize of output 16 [2021-12-15 21:34:29,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-12-15 21:34:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:29,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970888861] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:29,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:29,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 57 [2021-12-15 21:34:29,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110935565] [2021-12-15 21:34:29,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:29,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-15 21:34:29,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:29,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-15 21:34:29,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2805, Unknown=0, NotChecked=0, Total=3192 [2021-12-15 21:34:29,390 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 57 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:30,209 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2021-12-15 21:34:30,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-15 21:34:30,210 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 57 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-15 21:34:30,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:30,210 INFO L225 Difference]: With dead ends: 115 [2021-12-15 21:34:30,210 INFO L226 Difference]: Without dead ends: 75 [2021-12-15 21:34:30,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=779, Invalid=6361, Unknown=0, NotChecked=0, Total=7140 [2021-12-15 21:34:30,212 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:30,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 429 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 458 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2021-12-15 21:34:30,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-15 21:34:30,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-12-15 21:34:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-12-15 21:34:30,217 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 69 [2021-12-15 21:34:30,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:30,217 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-12-15 21:34:30,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 57 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:30,217 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-12-15 21:34:30,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 21:34:30,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:30,218 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:30,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:30,423 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,SelfDestructingSolverStorable21 [2021-12-15 21:34:30,423 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:30,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:30,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1242460280, now seen corresponding path program 19 times [2021-12-15 21:34:30,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:30,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912429191] [2021-12-15 21:34:30,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:30,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:30,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:30,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912429191] [2021-12-15 21:34:30,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912429191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:30,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999959352] [2021-12-15 21:34:30,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:34:30,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:30,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:30,731 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:30,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-15 21:34:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:30,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-15 21:34:30,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:30,881 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 15 treesize of output 11 [2021-12-15 21:34:30,939 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:34:30,940 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 27 treesize of output 26 [2021-12-15 21:34:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:31,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:31,403 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 16 treesize of output 14 [2021-12-15 21:34:31,404 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 28 treesize of output 24 [2021-12-15 21:34:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:31,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999959352] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:31,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:31,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24] total 35 [2021-12-15 21:34:31,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291432803] [2021-12-15 21:34:31,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:31,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-15 21:34:31,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:31,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-15 21:34:31,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 21:34:31,485 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 35 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:32,298 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2021-12-15 21:34:32,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-15 21:34:32,299 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 35 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have 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 [2021-12-15 21:34:32,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:32,299 INFO L225 Difference]: With dead ends: 131 [2021-12-15 21:34:32,299 INFO L226 Difference]: Without dead ends: 129 [2021-12-15 21:34:32,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=294, Invalid=3866, Unknown=0, NotChecked=0, Total=4160 [2021-12-15 21:34:32,301 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 96 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:32,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 680 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1375 Invalid, 0 Unknown, 5 Unchecked, 0.4s Time] [2021-12-15 21:34:32,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-15 21:34:32,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2021-12-15 21:34:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.05) internal successors, (84), 80 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) [2021-12-15 21:34:32,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-12-15 21:34:32,306 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 72 [2021-12-15 21:34:32,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:32,306 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-12-15 21:34:32,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.257142857142857) internal successors, (114), 35 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:32,307 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-12-15 21:34:32,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-15 21:34:32,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:32,307 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:32,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-15 21:34:32,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-15 21:34:32,523 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:32,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:32,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1441011814, now seen corresponding path program 2 times [2021-12-15 21:34:32,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:32,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916616638] [2021-12-15 21:34:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:32,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-15 21:34:32,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:32,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916616638] [2021-12-15 21:34:32,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916616638] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:32,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293530035] [2021-12-15 21:34:32,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:34:32,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:32,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:32,602 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:32,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-15 21:34:32,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:34:32,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:32,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 21:34:32,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-15 21:34:32,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-15 21:34:33,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293530035] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:33,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:33,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-15 21:34:33,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538038280] [2021-12-15 21:34:33,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:33,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 21:34:33,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:33,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 21:34:33,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-15 21:34:33,045 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 25 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) [2021-12-15 21:34:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:33,216 INFO L93 Difference]: Finished difference Result 283 states and 311 transitions. [2021-12-15 21:34:33,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 21:34:33,217 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-15 21:34:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:33,217 INFO L225 Difference]: With dead ends: 283 [2021-12-15 21:34:33,218 INFO L226 Difference]: Without dead ends: 243 [2021-12-15 21:34:33,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-15 21:34:33,218 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 278 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:33,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 102 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:34:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-15 21:34:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 115. [2021-12-15 21:34:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.131578947368421) internal successors, (129), 114 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) [2021-12-15 21:34:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2021-12-15 21:34:33,226 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 75 [2021-12-15 21:34:33,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:33,226 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2021-12-15 21:34:33,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 25 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) [2021-12-15 21:34:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2021-12-15 21:34:33,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-15 21:34:33,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:33,227 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:33,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-15 21:34:33,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:33,444 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:33,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:33,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1008588316, now seen corresponding path program 20 times [2021-12-15 21:34:33,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:33,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357141528] [2021-12-15 21:34:33,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:33,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:33,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:33,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357141528] [2021-12-15 21:34:33,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357141528] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:33,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288998918] [2021-12-15 21:34:33,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:34:33,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:33,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:33,782 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:33,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-15 21:34:33,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:34:33,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:33,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-15 21:34:33,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:33,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:33,980 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:34:33,981 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 25 treesize of output 24 [2021-12-15 21:34:34,028 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:34:34,028 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 25 treesize of output 24 [2021-12-15 21:34:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 2 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:34,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:34,520 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 16 treesize of output 14 [2021-12-15 21:34:34,521 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 28 treesize of output 24 [2021-12-15 21:34:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 303 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:34:34,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288998918] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:34,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:34,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25] total 36 [2021-12-15 21:34:34,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031754779] [2021-12-15 21:34:34,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:34,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-15 21:34:34,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:34,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-15 21:34:34,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2021-12-15 21:34:34,609 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 36 states, 36 states have (on average 3.3055555555555554) internal successors, (119), 36 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) [2021-12-15 21:34:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:35,329 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2021-12-15 21:34:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-15 21:34:35,329 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.3055555555555554) internal successors, (119), 36 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 75 [2021-12-15 21:34:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:35,330 INFO L225 Difference]: With dead ends: 160 [2021-12-15 21:34:35,330 INFO L226 Difference]: Without dead ends: 158 [2021-12-15 21:34:35,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 129 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=270, Invalid=3152, Unknown=0, NotChecked=0, Total=3422 [2021-12-15 21:34:35,331 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 65 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:35,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 600 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 21:34:35,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-15 21:34:35,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 114. [2021-12-15 21:34:35,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 113 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2021-12-15 21:34:35,338 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 75 [2021-12-15 21:34:35,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:35,338 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2021-12-15 21:34:35,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.3055555555555554) internal successors, (119), 36 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) [2021-12-15 21:34:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2021-12-15 21:34:35,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-15 21:34:35,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:35,339 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:35,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-15 21:34:35,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:35,545 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:35,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:35,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1156969278, now seen corresponding path program 21 times [2021-12-15 21:34:35,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:35,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668228524] [2021-12-15 21:34:35,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:35,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:35,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:35,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668228524] [2021-12-15 21:34:35,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668228524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:35,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941393306] [2021-12-15 21:34:35,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:34:35,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:35,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:35,841 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:35,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-15 21:34:36,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-15 21:34:36,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:36,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-15 21:34:36,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:36,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:37,210 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-15 21:34:37,211 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 44 treesize of output 23 [2021-12-15 21:34:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 153 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:37,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:38,078 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 18 treesize of output 16 [2021-12-15 21:34:38,080 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 34 treesize of output 28 [2021-12-15 21:34:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 144 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:38,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941393306] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:38,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:38,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 62 [2021-12-15 21:34:38,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423673294] [2021-12-15 21:34:38,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:38,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-15 21:34:38,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:38,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-15 21:34:38,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3332, Unknown=0, NotChecked=0, Total=3782 [2021-12-15 21:34:38,136 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 62 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:39,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:39,033 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2021-12-15 21:34:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-15 21:34:39,033 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 62 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-15 21:34:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:39,034 INFO L225 Difference]: With dead ends: 159 [2021-12-15 21:34:39,034 INFO L226 Difference]: Without dead ends: 115 [2021-12-15 21:34:39,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=905, Invalid=7651, Unknown=0, NotChecked=0, Total=8556 [2021-12-15 21:34:39,035 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 69 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:39,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 553 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 501 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2021-12-15 21:34:39,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-15 21:34:39,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-12-15 21:34:39,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 113 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2021-12-15 21:34:39,042 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 76 [2021-12-15 21:34:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:39,042 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2021-12-15 21:34:39,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.032258064516129) internal successors, (188), 62 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2021-12-15 21:34:39,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-15 21:34:39,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:39,043 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:39,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-15 21:34:39,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-15 21:34:39,247 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:39,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:39,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1212887086, now seen corresponding path program 22 times [2021-12-15 21:34:39,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:39,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177832865] [2021-12-15 21:34:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:39,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:39,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:39,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177832865] [2021-12-15 21:34:39,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177832865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:39,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246091625] [2021-12-15 21:34:39,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:34:39,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:39,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:39,544 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:39,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-15 21:34:39,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:34:39,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:39,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-15 21:34:39,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:39,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:39,798 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:34:39,798 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 27 treesize of output 26 [2021-12-15 21:34:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:40,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:40,295 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 16 treesize of output 14 [2021-12-15 21:34:40,296 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 28 treesize of output 24 [2021-12-15 21:34:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:40,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246091625] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:40,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:40,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 38 [2021-12-15 21:34:40,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901936507] [2021-12-15 21:34:40,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:40,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-15 21:34:40,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:40,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-15 21:34:40,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 21:34:40,397 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:41,298 INFO L93 Difference]: Finished difference Result 173 states and 186 transitions. [2021-12-15 21:34:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-15 21:34:41,298 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-15 21:34:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:41,299 INFO L225 Difference]: With dead ends: 173 [2021-12-15 21:34:41,299 INFO L226 Difference]: Without dead ends: 171 [2021-12-15 21:34:41,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 136 SyntacticMatches, 10 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=321, Invalid=4649, Unknown=0, NotChecked=0, Total=4970 [2021-12-15 21:34:41,300 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 126 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:41,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 731 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1473 Invalid, 0 Unknown, 5 Unchecked, 0.5s Time] [2021-12-15 21:34:41,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-12-15 21:34:41,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 119. [2021-12-15 21:34:41,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.11864406779661) internal successors, (132), 118 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) [2021-12-15 21:34:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2021-12-15 21:34:41,308 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 79 [2021-12-15 21:34:41,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:41,308 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2021-12-15 21:34:41,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:41,309 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2021-12-15 21:34:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 21:34:41,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:41,309 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:41,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-15 21:34:41,509 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,SelfDestructingSolverStorable26 [2021-12-15 21:34:41,510 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:41,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:41,510 INFO L85 PathProgramCache]: Analyzing trace with hash -931415362, now seen corresponding path program 23 times [2021-12-15 21:34:41,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:41,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348016666] [2021-12-15 21:34:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:41,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:41,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:41,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348016666] [2021-12-15 21:34:41,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348016666] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:41,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235197448] [2021-12-15 21:34:41,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:34:41,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:41,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:41,861 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:41,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-15 21:34:42,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-15 21:34:42,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:42,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-15 21:34:42,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:42,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:42,336 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:34:42,336 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 25 treesize of output 24 [2021-12-15 21:34:42,385 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:34:42,385 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 25 treesize of output 24 [2021-12-15 21:34:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 2 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:42,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:42,937 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 16 treesize of output 14 [2021-12-15 21:34:42,939 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 28 treesize of output 24 [2021-12-15 21:34:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 371 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:34:43,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235197448] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:43,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:43,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 27] total 39 [2021-12-15 21:34:43,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639113122] [2021-12-15 21:34:43,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:43,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 21:34:43,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:43,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 21:34:43,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 21:34:43,037 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:43,895 INFO L93 Difference]: Finished difference Result 168 states and 181 transitions. [2021-12-15 21:34:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-15 21:34:43,896 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-15 21:34:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:43,896 INFO L225 Difference]: With dead ends: 168 [2021-12-15 21:34:43,896 INFO L226 Difference]: Without dead ends: 166 [2021-12-15 21:34:43,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 142 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=292, Invalid=3740, Unknown=0, NotChecked=0, Total=4032 [2021-12-15 21:34:43,897 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 102 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:43,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 707 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 21:34:43,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-15 21:34:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 118. [2021-12-15 21:34:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 117 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) [2021-12-15 21:34:43,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2021-12-15 21:34:43,906 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 82 [2021-12-15 21:34:43,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:43,906 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2021-12-15 21:34:43,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.3333333333333335) internal successors, (130), 39 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:43,906 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2021-12-15 21:34:43,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 21:34:43,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:43,907 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:43,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-15 21:34:44,112 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,SelfDestructingSolverStorable27 [2021-12-15 21:34:44,112 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:44,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:44,112 INFO L85 PathProgramCache]: Analyzing trace with hash 925630088, now seen corresponding path program 24 times [2021-12-15 21:34:44,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:44,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849609682] [2021-12-15 21:34:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:44,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:44,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:44,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849609682] [2021-12-15 21:34:44,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849609682] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:44,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234784566] [2021-12-15 21:34:44,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:34:44,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:44,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:44,455 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:44,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-15 21:34:44,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-15 21:34:44,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:44,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-15 21:34:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:45,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:45,925 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-15 21:34:45,926 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 44 treesize of output 23 [2021-12-15 21:34:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 190 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:45,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:46,878 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 18 treesize of output 16 [2021-12-15 21:34:46,881 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 34 treesize of output 28 [2021-12-15 21:34:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 180 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:46,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234784566] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:46,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:46,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 67 [2021-12-15 21:34:46,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755196510] [2021-12-15 21:34:46,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:46,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-15 21:34:46,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:46,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-15 21:34:46,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=3904, Unknown=0, NotChecked=0, Total=4422 [2021-12-15 21:34:46,934 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:47,976 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2021-12-15 21:34:47,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-15 21:34:47,976 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-15 21:34:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:47,977 INFO L225 Difference]: With dead ends: 167 [2021-12-15 21:34:47,977 INFO L226 Difference]: Without dead ends: 119 [2021-12-15 21:34:47,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1040, Invalid=9060, Unknown=0, NotChecked=0, Total=10100 [2021-12-15 21:34:47,978 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 66 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:47,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 575 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 503 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2021-12-15 21:34:47,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-15 21:34:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-12-15 21:34:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1111111111111112) internal successors, (130), 117 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2021-12-15 21:34:47,996 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 83 [2021-12-15 21:34:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:47,997 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2021-12-15 21:34:47,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.074626865671642) internal successors, (206), 67 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2021-12-15 21:34:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-15 21:34:47,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:47,997 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:48,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-15 21:34:48,198 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,SelfDestructingSolverStorable28 [2021-12-15 21:34:48,198 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:48,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:48,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1667994484, now seen corresponding path program 25 times [2021-12-15 21:34:48,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:48,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701711840] [2021-12-15 21:34:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:48,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:48,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:48,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701711840] [2021-12-15 21:34:48,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701711840] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:48,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400422039] [2021-12-15 21:34:48,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:34:48,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:48,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:48,596 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:34:48,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-15 21:34:48,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:48,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-15 21:34:48,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:48,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:48,870 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:34:48,870 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 27 treesize of output 26 [2021-12-15 21:34:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:49,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:49,453 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 16 treesize of output 14 [2021-12-15 21:34:49,455 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 28 treesize of output 24 [2021-12-15 21:34:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:49,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400422039] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:49,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:49,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 28] total 41 [2021-12-15 21:34:49,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367995269] [2021-12-15 21:34:49,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:49,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-15 21:34:49,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:49,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-15 21:34:49,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2021-12-15 21:34:49,550 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:50,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:50,586 INFO L93 Difference]: Finished difference Result 181 states and 193 transitions. [2021-12-15 21:34:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-15 21:34:50,586 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-12-15 21:34:50,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:50,587 INFO L225 Difference]: With dead ends: 181 [2021-12-15 21:34:50,587 INFO L226 Difference]: Without dead ends: 179 [2021-12-15 21:34:50,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 150 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=338, Invalid=5362, Unknown=0, NotChecked=0, Total=5700 [2021-12-15 21:34:50,589 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 106 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:50,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 785 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1749 Invalid, 0 Unknown, 8 Unchecked, 0.6s Time] [2021-12-15 21:34:50,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-15 21:34:50,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 123. [2021-12-15 21:34:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.1065573770491803) internal successors, (135), 122 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) [2021-12-15 21:34:50,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135 transitions. [2021-12-15 21:34:50,600 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 135 transitions. Word has length 86 [2021-12-15 21:34:50,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:50,600 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 135 transitions. [2021-12-15 21:34:50,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.317073170731707) internal successors, (136), 41 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 135 transitions. [2021-12-15 21:34:50,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-15 21:34:50,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:50,601 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:50,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-15 21:34:50,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:50,805 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:50,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1635858680, now seen corresponding path program 26 times [2021-12-15 21:34:50,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:50,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347507325] [2021-12-15 21:34:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:50,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 447 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:51,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:51,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347507325] [2021-12-15 21:34:51,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347507325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:51,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183548038] [2021-12-15 21:34:51,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:34:51,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:51,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:51,198 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) [2021-12-15 21:34:51,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-15 21:34:51,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:34:51,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:51,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-15 21:34:51,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:51,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:51,447 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:34:51,447 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 25 treesize of output 24 [2021-12-15 21:34:51,485 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:34:51,486 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 25 treesize of output 24 [2021-12-15 21:34:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 2 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:51,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:52,129 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 16 treesize of output 14 [2021-12-15 21:34:52,145 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 28 treesize of output 24 [2021-12-15 21:34:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 446 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:34:52,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183548038] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:52,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:52,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 42 [2021-12-15 21:34:52,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436885792] [2021-12-15 21:34:52,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:52,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-15 21:34:52,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:52,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-15 21:34:52,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2021-12-15 21:34:52,256 INFO L87 Difference]: Start difference. First operand 123 states and 135 transitions. Second operand has 42 states, 42 states have (on average 3.357142857142857) internal successors, (141), 42 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) [2021-12-15 21:34:53,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:53,226 INFO L93 Difference]: Finished difference Result 176 states and 188 transitions. [2021-12-15 21:34:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-15 21:34:53,227 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.357142857142857) internal successors, (141), 42 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) Word has length 89 [2021-12-15 21:34:53,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:53,227 INFO L225 Difference]: With dead ends: 176 [2021-12-15 21:34:53,227 INFO L226 Difference]: Without dead ends: 174 [2021-12-15 21:34:53,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 155 SyntacticMatches, 11 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=314, Invalid=4378, Unknown=0, NotChecked=0, Total=4692 [2021-12-15 21:34:53,229 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 108 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:53,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 853 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 21:34:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-12-15 21:34:53,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 122. [2021-12-15 21:34:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1074380165289257) internal successors, (134), 121 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:53,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 134 transitions. [2021-12-15 21:34:53,242 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 134 transitions. Word has length 89 [2021-12-15 21:34:53,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:53,242 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 134 transitions. [2021-12-15 21:34:53,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.357142857142857) internal successors, (141), 42 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) [2021-12-15 21:34:53,242 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 134 transitions. [2021-12-15 21:34:53,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-15 21:34:53,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:53,243 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:53,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-15 21:34:53,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:53,462 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:53,462 INFO L85 PathProgramCache]: Analyzing trace with hash -592174806, now seen corresponding path program 27 times [2021-12-15 21:34:53,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:53,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890677336] [2021-12-15 21:34:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:53,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:53,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:53,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890677336] [2021-12-15 21:34:53,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890677336] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:53,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168894929] [2021-12-15 21:34:53,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:34:53,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:53,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:53,823 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) [2021-12-15 21:34:53,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-15 21:34:54,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-15 21:34:54,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:54,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-15 21:34:54,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:54,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:55,310 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-15 21:34:55,310 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 44 treesize of output 23 [2021-12-15 21:34:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 231 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:55,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:56,585 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 18 treesize of output 16 [2021-12-15 21:34:56,586 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 34 treesize of output 28 [2021-12-15 21:34:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 220 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:56,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168894929] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:56,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:56,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 72 [2021-12-15 21:34:56,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386557113] [2021-12-15 21:34:56,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:56,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-15 21:34:56,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:56,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-15 21:34:56,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=591, Invalid=4520, Unknown=1, NotChecked=0, Total=5112 [2021-12-15 21:34:56,638 INFO L87 Difference]: Start difference. First operand 122 states and 134 transitions. Second operand has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:34:57,850 INFO L93 Difference]: Finished difference Result 175 states and 187 transitions. [2021-12-15 21:34:57,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-15 21:34:57,850 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-12-15 21:34:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:34:57,851 INFO L225 Difference]: With dead ends: 175 [2021-12-15 21:34:57,851 INFO L226 Difference]: Without dead ends: 123 [2021-12-15 21:34:57,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2157 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1184, Invalid=10587, Unknown=1, NotChecked=0, Total=11772 [2021-12-15 21:34:57,856 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 67 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:34:57,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 620 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 616 Invalid, 0 Unknown, 256 Unchecked, 0.2s Time] [2021-12-15 21:34:57,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-15 21:34:57,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-12-15 21:34:57,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0991735537190082) internal successors, (133), 121 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2021-12-15 21:34:57,869 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 90 [2021-12-15 21:34:57,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:34:57,869 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2021-12-15 21:34:57,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.111111111111111) internal successors, (224), 72 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:34:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2021-12-15 21:34:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-15 21:34:57,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:34:57,870 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:34:57,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-15 21:34:58,083 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,SelfDestructingSolverStorable31 [2021-12-15 21:34:58,083 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:34:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:34:58,084 INFO L85 PathProgramCache]: Analyzing trace with hash 756771518, now seen corresponding path program 28 times [2021-12-15 21:34:58,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:34:58,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871380065] [2021-12-15 21:34:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:34:58,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:34:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:34:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:58,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:34:58,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871380065] [2021-12-15 21:34:58,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871380065] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:34:58,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991141364] [2021-12-15 21:34:58,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:34:58,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:34:58,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:34:58,484 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) [2021-12-15 21:34:58,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-15 21:34:58,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:34:58,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:34:58,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-15 21:34:58,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:34:58,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:34:58,765 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-15 21:34:58,765 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 27 treesize of output 26 [2021-12-15 21:34:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:59,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:34:59,390 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 16 treesize of output 14 [2021-12-15 21:34:59,392 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 28 treesize of output 24 [2021-12-15 21:34:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:34:59,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991141364] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:34:59,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:34:59,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 30] total 44 [2021-12-15 21:34:59,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576866640] [2021-12-15 21:34:59,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:34:59,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-15 21:34:59,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:34:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-15 21:34:59,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2021-12-15 21:34:59,497 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:00,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:35:00,712 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2021-12-15 21:35:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-15 21:35:00,716 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-15 21:35:00,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:35:00,717 INFO L225 Difference]: With dead ends: 189 [2021-12-15 21:35:00,717 INFO L226 Difference]: Without dead ends: 187 [2021-12-15 21:35:00,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 163 SyntacticMatches, 9 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=375, Invalid=6431, Unknown=0, NotChecked=0, Total=6806 [2021-12-15 21:35:00,718 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 122 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 21:35:00,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1018 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2128 Invalid, 0 Unknown, 5 Unchecked, 0.7s Time] [2021-12-15 21:35:00,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-15 21:35:00,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 127. [2021-12-15 21:35:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 126 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) [2021-12-15 21:35:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2021-12-15 21:35:00,730 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 93 [2021-12-15 21:35:00,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:35:00,730 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2021-12-15 21:35:00,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.340909090909091) internal successors, (147), 44 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:35:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2021-12-15 21:35:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-15 21:35:00,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:35:00,731 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:35:00,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-15 21:35:00,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:00,939 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:35:00,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:35:00,940 INFO L85 PathProgramCache]: Analyzing trace with hash -792278870, now seen corresponding path program 29 times [2021-12-15 21:35:00,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:35:00,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651426722] [2021-12-15 21:35:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:35:00,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:35:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:35:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:35:01,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:35:01,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651426722] [2021-12-15 21:35:01,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651426722] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:35:01,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739507286] [2021-12-15 21:35:01,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:35:01,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:35:01,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:35:01,345 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) [2021-12-15 21:35:01,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-15 21:35:01,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-15 21:35:01,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:35:01,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-15 21:35:01,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:35:01,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 21:35:01,660 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:35:01,660 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 25 treesize of output 24 [2021-12-15 21:35:01,698 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 21:35:01,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24