./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_m2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_m2.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 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:43:04,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:43:04,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:43:04,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:43:04,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:43:04,457 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:43:04,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:43:04,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:43:04,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:43:04,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:43:04,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:43:04,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:43:04,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:43:04,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:43:04,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:43:04,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:43:04,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:43:04,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:43:04,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:43:04,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:43:04,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:43:04,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:43:04,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:43:04,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:43:04,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:43:04,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:43:04,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:43:04,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:43:04,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:43:04,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:43:04,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:43:04,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:43:04,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:43:04,508 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:43:04,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:43:04,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:43:04,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:43:04,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:43:04,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:43:04,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:43:04,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:43:04,513 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:43:04,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:43:04,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:43:04,546 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:43:04,546 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:43:04,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:43:04,547 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:43:04,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:43:04,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:43:04,548 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:43:04,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:43:04,549 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:43:04,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:43:04,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:43:04,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:43:04,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:43:04,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:43:04,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:43:04,550 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:43:04,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:43:04,551 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:43:04,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:43:04,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:43:04,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:43:04,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:43:04,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:43:04,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:43:04,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:43:04,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:43:04,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:43:04,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:43:04,553 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:43:04,553 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:43:04,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:43:04,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:43:04,554 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64e2b591ee375a99f019d69fefe326e9fd46db25f76a67e4f3bee333adbec68f [2021-12-15 08:43:04,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:43:04,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:43:04,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:43:04,818 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:43:04,819 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:43:04,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_m2.c [2021-12-15 08:43:04,887 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec229debe/d1d08f71ab254bbe8410f50aef566f32/FLAG0014dca38 [2021-12-15 08:43:05,267 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:43:05,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_m2.c [2021-12-15 08:43:05,273 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec229debe/d1d08f71ab254bbe8410f50aef566f32/FLAG0014dca38 [2021-12-15 08:43:05,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec229debe/d1d08f71ab254bbe8410f50aef566f32 [2021-12-15 08:43:05,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:43:05,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:43:05,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:43:05,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:43:05,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:43:05,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:43:05" (1/1) ... [2021-12-15 08:43:05,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47dd23ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:05, skipping insertion in model container [2021-12-15 08:43:05,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:43:05" (1/1) ... [2021-12-15 08:43:05,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:43:05,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:43:05,863 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-crafted/zero_sum_m2.c[402,415] [2021-12-15 08:43:05,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:43:05,890 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:43:05,898 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-crafted/zero_sum_m2.c[402,415] [2021-12-15 08:43:05,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:43:05,918 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:43:05,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:05 WrapperNode [2021-12-15 08:43:05,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:43:05,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:43:05,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:43:05,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:43:05,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:05" (1/1) ... [2021-12-15 08:43:05,934 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:05" (1/1) ... [2021-12-15 08:43:05,963 INFO L137 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2021-12-15 08:43:05,964 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:43:05,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:43:05,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:43:05,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:43:05,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:05" (1/1) ... [2021-12-15 08:43:05,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:05" (1/1) ... [2021-12-15 08:43:05,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:05" (1/1) ... [2021-12-15 08:43:05,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:05" (1/1) ... [2021-12-15 08:43:05,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:05" (1/1) ... [2021-12-15 08:43:06,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:05" (1/1) ... [2021-12-15 08:43:06,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:05" (1/1) ... [2021-12-15 08:43:06,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:43:06,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:43:06,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:43:06,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:43:06,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:05" (1/1) ... [2021-12-15 08:43:06,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:43:06,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:06,044 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 08:43:06,069 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 08:43:06,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:43:06,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:43:06,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 08:43:06,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:43:06,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:43:06,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:43:06,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:43:06,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 08:43:06,149 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:43:06,151 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:43:06,251 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:43:06,255 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:43:06,256 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-15 08:43:06,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:43:06 BoogieIcfgContainer [2021-12-15 08:43:06,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:43:06,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:43:06,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:43:06,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:43:06,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:43:05" (1/3) ... [2021-12-15 08:43:06,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e31807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:43:06, skipping insertion in model container [2021-12-15 08:43:06,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:43:05" (2/3) ... [2021-12-15 08:43:06,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e31807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:43:06, skipping insertion in model container [2021-12-15 08:43:06,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:43:06" (3/3) ... [2021-12-15 08:43:06,266 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2021-12-15 08:43:06,275 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:43:06,275 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:43:06,321 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:43:06,334 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 08:43:06,335 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:43:06,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:06,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 08:43:06,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:06,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:06,357 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:06,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:06,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2021-12-15 08:43:06,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:06,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676218931] [2021-12-15 08:43:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:06,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:06,479 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 08:43:06,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:06,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676218931] [2021-12-15 08:43:06,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676218931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:43:06,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:43:06,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:43:06,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951166079] [2021-12-15 08:43:06,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:43:06,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:43:06,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:06,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:43:06,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:43:06,511 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:06,527 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2021-12-15 08:43:06,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:43:06,531 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-15 08:43:06,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:06,538 INFO L225 Difference]: With dead ends: 47 [2021-12-15 08:43:06,538 INFO L226 Difference]: Without dead ends: 21 [2021-12-15 08:43:06,541 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 08:43:06,547 INFO L933 BasicCegarLoop]: 31 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, 31 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 08:43:06,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:43:06,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-15 08:43:06,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-15 08:43:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-15 08:43:06,586 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2021-12-15 08:43:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:06,586 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-15 08:43:06,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-15 08:43:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 08:43:06,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:06,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:06,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:43:06,589 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:06,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:06,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2021-12-15 08:43:06,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:06,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528497829] [2021-12-15 08:43:06,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:06,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:06,668 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 08:43:06,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:06,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528497829] [2021-12-15 08:43:06,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528497829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:43:06,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:43:06,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:43:06,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071212829] [2021-12-15 08:43:06,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:43:06,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:43:06,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:06,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:43:06,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:43:06,672 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:06,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:06,715 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-12-15 08:43:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:43:06,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-15 08:43:06,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:06,716 INFO L225 Difference]: With dead ends: 39 [2021-12-15 08:43:06,716 INFO L226 Difference]: Without dead ends: 23 [2021-12-15 08:43:06,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:43:06,718 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:06,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:43:06,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-15 08:43:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-12-15 08:43:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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 08:43:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-15 08:43:06,724 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2021-12-15 08:43:06,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:06,724 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-15 08:43:06,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-15 08:43:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 08:43:06,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:06,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:06,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:43:06,726 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:06,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:06,727 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2021-12-15 08:43:06,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:06,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539600403] [2021-12-15 08:43:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:06,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:43:06,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:06,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539600403] [2021-12-15 08:43:06,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539600403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:43:06,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:43:06,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:43:06,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847260841] [2021-12-15 08:43:06,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:43:06,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:43:06,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:06,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:43:06,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:43:06,811 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:06,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:06,884 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-12-15 08:43:06,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:43:06,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-15 08:43:06,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:06,887 INFO L225 Difference]: With dead ends: 43 [2021-12-15 08:43:06,888 INFO L226 Difference]: Without dead ends: 30 [2021-12-15 08:43:06,888 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 08:43:06,890 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:06,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:43:06,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-15 08:43:06,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-12-15 08:43:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-15 08:43:06,902 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-12-15 08:43:06,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:06,902 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-15 08:43:06,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-15 08:43:06,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 08:43:06,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:06,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:06,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 08:43:06,904 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:06,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:06,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2021-12-15 08:43:06,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:06,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104512641] [2021-12-15 08:43:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:06,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:43:06,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:06,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104512641] [2021-12-15 08:43:06,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104512641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:43:06,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847519889] [2021-12-15 08:43:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:06,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:06,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:06,981 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 08:43:06,983 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 08:43:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:07,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 08:43:07,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:43:07,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:43:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:43:07,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847519889] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:43:07,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:43:07,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 08:43:07,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957845168] [2021-12-15 08:43:07,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:43:07,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 08:43:07,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:07,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 08:43:07,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:43:07,207 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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 08:43:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:07,238 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-15 08:43:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 08:43:07,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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 25 [2021-12-15 08:43:07,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:07,239 INFO L225 Difference]: With dead ends: 49 [2021-12-15 08:43:07,239 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 08:43:07,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:43:07,241 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:07,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 45 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:43:07,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 08:43:07,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-12-15 08:43:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 08:43:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-15 08:43:07,246 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-12-15 08:43:07,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:07,246 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-15 08:43:07,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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 08:43:07,247 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-15 08:43:07,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 08:43:07,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:07,248 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:07,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 08:43:07,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:07,476 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:07,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:07,476 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2021-12-15 08:43:07,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:07,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827783166] [2021-12-15 08:43:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:07,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 08:43:07,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:07,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827783166] [2021-12-15 08:43:07,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827783166] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:43:07,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752040832] [2021-12-15 08:43:07,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:43:07,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:07,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:07,555 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 08:43:07,576 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 08:43:07,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:43:07,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:43:07,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 08:43:07,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 08:43:07,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:43:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 08:43:07,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752040832] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:43:07,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:43:07,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-15 08:43:07,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135178167] [2021-12-15 08:43:07,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:43:07,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 08:43:07,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:07,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 08:43:07,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-15 08:43:07,881 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:07,970 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-12-15 08:43:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 08:43:07,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have 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 08:43:07,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:07,972 INFO L225 Difference]: With dead ends: 56 [2021-12-15 08:43:07,972 INFO L226 Difference]: Without dead ends: 40 [2021-12-15 08:43:07,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-15 08:43:07,974 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:07,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:43:07,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-15 08:43:07,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-12-15 08:43:07,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 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 08:43:07,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-12-15 08:43:07,987 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2021-12-15 08:43:07,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:07,988 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-12-15 08:43:07,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:07,988 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-12-15 08:43:07,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 08:43:07,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:07,989 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:08,015 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 08:43:08,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:08,208 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:08,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:08,208 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2021-12-15 08:43:08,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:08,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253188673] [2021-12-15 08:43:08,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:08,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:09,324 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 08:43:09,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:09,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253188673] [2021-12-15 08:43:09,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253188673] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:43:09,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181629525] [2021-12-15 08:43:09,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:43:09,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:09,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:09,326 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 08:43:09,328 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 08:43:09,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 08:43:09,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:43:09,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-15 08:43:09,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:11,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:43:11,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-12-15 08:43:11,623 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 08:43:11,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:43:16,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:43:16,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 103 [2021-12-15 08:43:17,907 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 08:43:17,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181629525] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:43:17,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:43:17,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28, 27] total 70 [2021-12-15 08:43:17,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705455278] [2021-12-15 08:43:17,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:43:17,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-15 08:43:17,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:17,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-15 08:43:17,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=4459, Unknown=0, NotChecked=0, Total=4830 [2021-12-15 08:43:17,916 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 70 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 70 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 08:43:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:20,726 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2021-12-15 08:43:20,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-15 08:43:20,727 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 70 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 35 [2021-12-15 08:43:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:20,728 INFO L225 Difference]: With dead ends: 89 [2021-12-15 08:43:20,729 INFO L226 Difference]: Without dead ends: 83 [2021-12-15 08:43:20,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 19 SyntacticMatches, 10 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=780, Invalid=10140, Unknown=0, NotChecked=0, Total=10920 [2021-12-15 08:43:20,733 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:20,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 123 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 371 Invalid, 0 Unknown, 437 Unchecked, 0.2s Time] [2021-12-15 08:43:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-15 08:43:20,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2021-12-15 08:43:20,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-12-15 08:43:20,740 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2021-12-15 08:43:20,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:20,741 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-12-15 08:43:20,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 70 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 08:43:20,741 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-12-15 08:43:20,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 08:43:20,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:20,742 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:20,766 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 08:43:20,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:20,960 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:20,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:20,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2021-12-15 08:43:20,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:20,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635210251] [2021-12-15 08:43:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:20,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:43:21,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:21,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635210251] [2021-12-15 08:43:21,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635210251] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:43:21,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146517414] [2021-12-15 08:43:21,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:43:21,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:21,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:21,068 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 08:43:21,072 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 08:43:21,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:43:21,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:43:21,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 08:43:21,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:43:21,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:43:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:43:21,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146517414] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:43:21,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:43:21,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 08:43:21,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120446743] [2021-12-15 08:43:21,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:43:21,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 08:43:21,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:21,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 08:43:21,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-15 08:43:21,287 INFO L87 Difference]: Start difference. First operand 53 states and 60 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 08:43:21,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:21,426 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2021-12-15 08:43:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 08:43:21,426 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 37 [2021-12-15 08:43:21,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:21,427 INFO L225 Difference]: With dead ends: 104 [2021-12-15 08:43:21,427 INFO L226 Difference]: Without dead ends: 56 [2021-12-15 08:43:21,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-12-15 08:43:21,428 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:21,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 58 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:43:21,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-15 08:43:21,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-12-15 08:43:21,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:21,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-12-15 08:43:21,434 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 37 [2021-12-15 08:43:21,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:21,434 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-12-15 08:43:21,434 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 08:43:21,435 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-12-15 08:43:21,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 08:43:21,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:21,437 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:21,453 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 08:43:21,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:21,640 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:21,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:21,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1270817660, now seen corresponding path program 5 times [2021-12-15 08:43:21,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:21,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376221160] [2021-12-15 08:43:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:21,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:43:21,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:21,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376221160] [2021-12-15 08:43:21,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376221160] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:43:21,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657527119] [2021-12-15 08:43:21,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 08:43:21,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:21,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:21,702 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 08:43:21,709 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 08:43:21,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 08:43:21,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:43:21,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 08:43:21,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:43:21,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:43:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 08:43:21,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657527119] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:43:21,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:43:21,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 08:43:21,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904661992] [2021-12-15 08:43:21,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:43:21,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 08:43:21,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:21,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 08:43:21,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-15 08:43:21,942 INFO L87 Difference]: Start difference. First operand 55 states and 62 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 08:43:22,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:22,078 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2021-12-15 08:43:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 08:43:22,078 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 39 [2021-12-15 08:43:22,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:22,079 INFO L225 Difference]: With dead ends: 83 [2021-12-15 08:43:22,079 INFO L226 Difference]: Without dead ends: 50 [2021-12-15 08:43:22,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-12-15 08:43:22,080 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 133 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:22,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 24 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:43:22,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-15 08:43:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-12-15 08:43:22,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:22,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-12-15 08:43:22,086 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2021-12-15 08:43:22,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:22,086 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-12-15 08:43:22,086 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 08:43:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-12-15 08:43:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 08:43:22,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:22,087 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:22,107 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 08:43:22,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:22,292 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:22,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:22,292 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2021-12-15 08:43:22,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:22,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104947479] [2021-12-15 08:43:22,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:22,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:43:23,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:23,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104947479] [2021-12-15 08:43:23,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104947479] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:43:23,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415670605] [2021-12-15 08:43:23,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 08:43:23,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:23,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:23,588 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 08:43:23,589 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 08:43:23,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-15 08:43:23,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:43:23,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-15 08:43:23,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:43:25,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:43:41,341 INFO L354 Elim1Store]: treesize reduction 59, result has 73.9 percent of original size [2021-12-15 08:43:41,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 112 treesize of output 189 [2021-12-15 08:43:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:43:49,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415670605] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:43:49,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:43:49,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 93 [2021-12-15 08:43:49,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962250346] [2021-12-15 08:43:49,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:43:49,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-12-15 08:43:49,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:49,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-12-15 08:43:49,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=7866, Unknown=4, NotChecked=0, Total=8556 [2021-12-15 08:43:49,915 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 93 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:51,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:51,414 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-12-15 08:43:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-15 08:43:51,414 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-15 08:43:51,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:51,418 INFO L225 Difference]: With dead ends: 79 [2021-12-15 08:43:51,418 INFO L226 Difference]: Without dead ends: 75 [2021-12-15 08:43:51,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4484 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=965, Invalid=10803, Unknown=4, NotChecked=0, Total=11772 [2021-12-15 08:43:51,423 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 609 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:51,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 154 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 779 Invalid, 0 Unknown, 609 Unchecked, 0.4s Time] [2021-12-15 08:43:51,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-15 08:43:51,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2021-12-15 08:43:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 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 08:43:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-12-15 08:43:51,436 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2021-12-15 08:43:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:51,439 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-12-15 08:43:51,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.2473118279569892) internal successors, (116), 93 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:51,440 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-12-15 08:43:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 08:43:51,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:51,441 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:51,469 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 08:43:51,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:51,664 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:51,665 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2021-12-15 08:43:51,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:51,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914750010] [2021-12-15 08:43:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:51,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:43:51,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:51,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914750010] [2021-12-15 08:43:51,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914750010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:43:51,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67932430] [2021-12-15 08:43:51,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 08:43:51,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:51,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:51,760 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 08:43:51,788 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 08:43:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:51,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 08:43:51,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:43:51,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:43:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:43:52,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67932430] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:43:52,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:43:52,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-15 08:43:52,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679775791] [2021-12-15 08:43:52,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:43:52,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 08:43:52,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:52,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 08:43:52,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-12-15 08:43:52,037 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:52,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:52,180 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2021-12-15 08:43:52,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 08:43:52,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-15 08:43:52,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:52,181 INFO L225 Difference]: With dead ends: 132 [2021-12-15 08:43:52,181 INFO L226 Difference]: Without dead ends: 70 [2021-12-15 08:43:52,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-12-15 08:43:52,182 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 68 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:52,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 60 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:43:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-15 08:43:52,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-12-15 08:43:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 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 08:43:52,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2021-12-15 08:43:52,188 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 47 [2021-12-15 08:43:52,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:52,188 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2021-12-15 08:43:52,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2021-12-15 08:43:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 08:43:52,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:52,189 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:52,205 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 08:43:52,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:52,392 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:52,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:52,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1331298990, now seen corresponding path program 8 times [2021-12-15 08:43:52,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:52,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890196640] [2021-12-15 08:43:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:52,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:43:52,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:52,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890196640] [2021-12-15 08:43:52,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890196640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:43:52,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928981677] [2021-12-15 08:43:52,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:43:52,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:52,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:52,481 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 08:43:52,512 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 08:43:52,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:43:52,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:43:52,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 08:43:52,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:43:52,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:43:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 08:43:52,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928981677] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:43:52,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:43:52,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-15 08:43:52,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744298693] [2021-12-15 08:43:52,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:43:52,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 08:43:52,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:43:52,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 08:43:52,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-15 08:43:52,748 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:52,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:43:52,912 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2021-12-15 08:43:52,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 08:43:52,913 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-15 08:43:52,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:43:52,913 INFO L225 Difference]: With dead ends: 101 [2021-12-15 08:43:52,913 INFO L226 Difference]: Without dead ends: 60 [2021-12-15 08:43:52,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2021-12-15 08:43:52,914 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 82 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:43:52,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 37 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:43:52,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-15 08:43:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-12-15 08:43:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-12-15 08:43:52,919 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2021-12-15 08:43:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:43:52,919 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-12-15 08:43:52,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:43:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-12-15 08:43:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 08:43:52,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:43:52,921 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:43:52,942 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 08:43:53,139 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,SelfDestructingSolverStorable10 [2021-12-15 08:43:53,139 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:43:53,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:43:53,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2021-12-15 08:43:53,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:43:53,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878808675] [2021-12-15 08:43:53,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:43:53,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:43:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:43:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:43:55,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:43:55,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878808675] [2021-12-15 08:43:55,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878808675] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:43:55,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577879912] [2021-12-15 08:43:55,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:43:55,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:43:55,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:43:55,235 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 08:43:55,235 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 08:43:55,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-15 08:43:55,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:43:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-15 08:43:55,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:43:55,363 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 08:43:59,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:43:59,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:43:59,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:43:59,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:43:59,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2021-12-15 08:43:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:43:59,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:44:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:44:09,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577879912] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:44:09,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:44:09,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 40, 38] total 116 [2021-12-15 08:44:09,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948008788] [2021-12-15 08:44:09,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:44:09,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-15 08:44:09,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:44:09,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-15 08:44:09,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=12795, Unknown=0, NotChecked=0, Total=13340 [2021-12-15 08:44:09,102 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 116 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)