./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/avg05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/avg05-1.i -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 02f02b7f59fc1c3b5c77751f648b2e92e85109b700d3d48af7999437b36b94ea --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 22:17:34,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:17:34,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:17:34,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:17:34,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:17:34,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:17:34,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:17:34,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:17:34,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:17:34,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:17:34,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:17:34,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:17:34,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:17:34,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:17:34,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:17:34,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:17:34,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:17:34,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:17:34,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:17:34,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:17:34,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:17:34,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:17:34,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:17:34,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:17:34,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:17:34,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:17:34,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:17:34,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:17:34,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:17:34,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:17:34,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:17:34,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:17:34,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:17:34,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:17:34,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:17:34,407 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:17:34,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:17:34,408 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:17:34,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:17:34,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:17:34,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:17:34,411 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:17:34,436 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:17:34,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:17:34,437 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:17:34,437 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:17:34,438 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:17:34,438 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:17:34,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:17:34,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:17:34,439 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:17:34,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:17:34,440 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:17:34,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:17:34,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:17:34,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:17:34,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:17:34,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:17:34,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:17:34,442 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:17:34,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:17:34,442 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:17:34,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:17:34,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:17:34,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:17:34,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:17:34,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:17:34,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:17:34,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:17:34,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:17:34,444 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:17:34,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:17:34,445 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:17:34,445 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:17:34,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:17:34,445 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:17:34,445 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02f02b7f59fc1c3b5c77751f648b2e92e85109b700d3d48af7999437b36b94ea [2021-12-16 22:17:34,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:17:34,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:17:34,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:17:34,671 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:17:34,672 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:17:34,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/avg05-1.i [2021-12-16 22:17:34,748 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e2638a9e/f6a5d0094fe04d12a2fa25fb12886524/FLAGffc39ad19 [2021-12-16 22:17:35,114 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:17:35,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg05-1.i [2021-12-16 22:17:35,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e2638a9e/f6a5d0094fe04d12a2fa25fb12886524/FLAGffc39ad19 [2021-12-16 22:17:35,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e2638a9e/f6a5d0094fe04d12a2fa25fb12886524 [2021-12-16 22:17:35,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:17:35,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:17:35,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:17:35,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:17:35,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:17:35,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:17:35" (1/1) ... [2021-12-16 22:17:35,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7552abc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:35, skipping insertion in model container [2021-12-16 22:17:35,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:17:35" (1/1) ... [2021-12-16 22:17:35,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:17:35,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:17:35,736 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/reducercommutativity/avg05-1.i[1275,1288] [2021-12-16 22:17:35,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:17:35,745 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:17:35,761 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/reducercommutativity/avg05-1.i[1275,1288] [2021-12-16 22:17:35,762 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:17:35,773 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:17:35,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:35 WrapperNode [2021-12-16 22:17:35,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:17:35,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:17:35,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:17:35,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:17:35,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:35" (1/1) ... [2021-12-16 22:17:35,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:35" (1/1) ... [2021-12-16 22:17:35,822 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-12-16 22:17:35,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:17:35,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:17:35,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:17:35,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:17:35,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:35" (1/1) ... [2021-12-16 22:17:35,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:35" (1/1) ... [2021-12-16 22:17:35,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:35" (1/1) ... [2021-12-16 22:17:35,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:35" (1/1) ... [2021-12-16 22:17:35,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:35" (1/1) ... [2021-12-16 22:17:35,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:35" (1/1) ... [2021-12-16 22:17:35,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:35" (1/1) ... [2021-12-16 22:17:35,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:17:35,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:17:35,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:17:35,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:17:35,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:35" (1/1) ... [2021-12-16 22:17:35,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:17:35,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:35,905 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) [2021-12-16 22:17:35,929 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 [2021-12-16 22:17:35,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:17:35,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:17:35,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 22:17:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:17:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2021-12-16 22:17:35,945 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2021-12-16 22:17:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:17:35,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:17:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:17:35,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 22:17:35,997 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:17:35,998 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:17:36,159 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:17:36,166 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:17:36,168 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 22:17:36,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:17:36 BoogieIcfgContainer [2021-12-16 22:17:36,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:17:36,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:17:36,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:17:36,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:17:36,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:17:35" (1/3) ... [2021-12-16 22:17:36,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6ad9a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:17:36, skipping insertion in model container [2021-12-16 22:17:36,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:17:35" (2/3) ... [2021-12-16 22:17:36,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6ad9a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:17:36, skipping insertion in model container [2021-12-16 22:17:36,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:17:36" (3/3) ... [2021-12-16 22:17:36,188 INFO L111 eAbstractionObserver]: Analyzing ICFG avg05-1.i [2021-12-16 22:17:36,193 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:17:36,193 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:17:36,238 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:17:36,244 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 [2021-12-16 22:17:36,245 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:17:36,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:17:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 22:17:36,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:36,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:36,266 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:36,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2001158789, now seen corresponding path program 1 times [2021-12-16 22:17:36,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:36,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871805933] [2021-12-16 22:17:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:36,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:36,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:17:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:36,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 22:17:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:36,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:17:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 22:17:36,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:36,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871805933] [2021-12-16 22:17:36,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871805933] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:36,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978112404] [2021-12-16 22:17:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:36,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:36,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:36,563 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) [2021-12-16 22:17:36,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 22:17:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:36,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 22:17:36,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:17:36,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:17:36,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978112404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:17:36,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:17:36,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-16 22:17:36,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529442757] [2021-12-16 22:17:36,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:17:36,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:17:36,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:36,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:17:36,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:17:36,787 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 22:17:36,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:36,813 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-12-16 22:17:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:17:36,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-16 22:17:36,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:36,821 INFO L225 Difference]: With dead ends: 50 [2021-12-16 22:17:36,822 INFO L226 Difference]: Without dead ends: 24 [2021-12-16 22:17:36,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:17:36,828 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:36,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:36,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-16 22:17:36,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-12-16 22:17:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:17:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-16 22:17:36,860 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2021-12-16 22:17:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:36,861 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-16 22:17:36,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 22:17:36,861 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-16 22:17:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 22:17:36,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:36,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:36,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:37,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-16 22:17:37,089 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:37,089 INFO L85 PathProgramCache]: Analyzing trace with hash 202333565, now seen corresponding path program 1 times [2021-12-16 22:17:37,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:37,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495289547] [2021-12-16 22:17:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:37,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:37,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 22:17:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:37,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 22:17:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:37,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:17:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:17:37,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:37,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495289547] [2021-12-16 22:17:37,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495289547] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:37,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818588483] [2021-12-16 22:17:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:37,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:37,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:37,177 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) [2021-12-16 22:17:37,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 22:17:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:37,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 22:17:37,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 22:17:37,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:17:37,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818588483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:17:37,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:17:37,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-16 22:17:37,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766788221] [2021-12-16 22:17:37,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:17:37,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:17:37,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:37,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:17:37,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:17:37,297 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:17:37,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:37,306 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-12-16 22:17:37,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:17:37,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-16 22:17:37,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:37,308 INFO L225 Difference]: With dead ends: 42 [2021-12-16 22:17:37,308 INFO L226 Difference]: Without dead ends: 25 [2021-12-16 22:17:37,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:17:37,310 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:37,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-16 22:17:37,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-16 22:17:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:17:37,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-16 22:17:37,316 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2021-12-16 22:17:37,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:37,316 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-16 22:17:37,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:17:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-16 22:17:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-16 22:17:37,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:37,318 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:37,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:37,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-16 22:17:37,544 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:37,544 INFO L85 PathProgramCache]: Analyzing trace with hash -796008709, now seen corresponding path program 1 times [2021-12-16 22:17:37,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:37,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229707930] [2021-12-16 22:17:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:37,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:37,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 22:17:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:37,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 22:17:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:37,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 22:17:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 22:17:37,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:37,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229707930] [2021-12-16 22:17:37,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229707930] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:37,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871822066] [2021-12-16 22:17:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:37,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:37,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:37,670 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) [2021-12-16 22:17:37,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 22:17:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:37,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 22:17:37,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 22:17:37,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:17:37,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871822066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:17:37,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:17:37,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-16 22:17:37,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979819845] [2021-12-16 22:17:37,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:17:37,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:17:37,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:37,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:17:37,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:17:37,824 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:17:37,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:37,840 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-16 22:17:37,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:17:37,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-12-16 22:17:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:37,843 INFO L225 Difference]: With dead ends: 39 [2021-12-16 22:17:37,843 INFO L226 Difference]: Without dead ends: 26 [2021-12-16 22:17:37,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:17:37,848 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:37,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:37,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-16 22:17:37,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-12-16 22:17:37,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:17:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-16 22:17:37,857 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2021-12-16 22:17:37,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:37,859 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-16 22:17:37,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:17:37,859 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-16 22:17:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-16 22:17:37,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:37,860 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:37,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 22:17:38,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:38,061 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:38,061 INFO L85 PathProgramCache]: Analyzing trace with hash 165229081, now seen corresponding path program 1 times [2021-12-16 22:17:38,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:38,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109291052] [2021-12-16 22:17:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:38,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:38,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 22:17:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:38,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 22:17:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:38,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:17:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 22:17:38,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:38,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109291052] [2021-12-16 22:17:38,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109291052] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:38,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531546203] [2021-12-16 22:17:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:38,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:38,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:38,183 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) [2021-12-16 22:17:38,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 22:17:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:38,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 22:17:38,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 22:17:38,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-16 22:17:38,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531546203] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:38,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:38,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-16 22:17:38,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704232863] [2021-12-16 22:17:38,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:38,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 22:17:38,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:38,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 22:17:38,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:17:38,424 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:17:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:38,475 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2021-12-16 22:17:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 22:17:38,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2021-12-16 22:17:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:38,479 INFO L225 Difference]: With dead ends: 54 [2021-12-16 22:17:38,479 INFO L226 Difference]: Without dead ends: 34 [2021-12-16 22:17:38,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:17:38,484 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:38,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:38,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-16 22:17:38,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-12-16 22:17:38,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:17:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-16 22:17:38,498 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2021-12-16 22:17:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:38,498 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-16 22:17:38,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:17:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-16 22:17:38,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-16 22:17:38,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:38,501 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:38,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:38,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:38,723 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:38,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:38,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1299679203, now seen corresponding path program 2 times [2021-12-16 22:17:38,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:38,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954021528] [2021-12-16 22:17:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:38,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:38,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 22:17:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:38,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 22:17:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:38,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 22:17:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-16 22:17:38,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:38,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954021528] [2021-12-16 22:17:38,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954021528] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:38,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593320069] [2021-12-16 22:17:38,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:17:38,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:38,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:38,800 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) [2021-12-16 22:17:38,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 22:17:38,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:17:38,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:38,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 22:17:38,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 22:17:39,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 22:17:39,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593320069] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:39,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:39,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2021-12-16 22:17:39,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63051484] [2021-12-16 22:17:39,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:39,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 22:17:39,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:39,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 22:17:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:17:39,117 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 22:17:39,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:39,163 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2021-12-16 22:17:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 22:17:39,164 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2021-12-16 22:17:39,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:39,166 INFO L225 Difference]: With dead ends: 60 [2021-12-16 22:17:39,166 INFO L226 Difference]: Without dead ends: 38 [2021-12-16 22:17:39,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:17:39,167 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:39,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 100 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:39,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-16 22:17:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-12-16 22:17:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:17:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-12-16 22:17:39,180 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 50 [2021-12-16 22:17:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:39,182 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-12-16 22:17:39,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 22:17:39,183 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-12-16 22:17:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-16 22:17:39,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:39,187 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:39,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:39,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:39,388 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:39,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1889542979, now seen corresponding path program 3 times [2021-12-16 22:17:39,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:39,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355335191] [2021-12-16 22:17:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:39,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:39,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:17:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:39,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 22:17:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:39,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:17:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-16 22:17:39,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:39,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355335191] [2021-12-16 22:17:39,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355335191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:39,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717158841] [2021-12-16 22:17:39,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:17:39,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:39,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:39,476 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) [2021-12-16 22:17:39,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 22:17:39,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 22:17:39,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:39,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 22:17:39,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-16 22:17:39,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-16 22:17:39,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717158841] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:39,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:39,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-16 22:17:39,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896086495] [2021-12-16 22:17:39,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:39,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 22:17:39,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 22:17:39,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:17:39,717 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:17:39,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:39,742 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2021-12-16 22:17:39,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 22:17:39,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2021-12-16 22:17:39,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:39,744 INFO L225 Difference]: With dead ends: 66 [2021-12-16 22:17:39,744 INFO L226 Difference]: Without dead ends: 43 [2021-12-16 22:17:39,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:17:39,745 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:39,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 68 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:39,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-16 22:17:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-16 22:17:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:17:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-12-16 22:17:39,751 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 54 [2021-12-16 22:17:39,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:39,751 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-12-16 22:17:39,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:17:39,752 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-12-16 22:17:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-16 22:17:39,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:39,759 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:39,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:39,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:39,976 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2086234039, now seen corresponding path program 4 times [2021-12-16 22:17:39,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:39,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618163937] [2021-12-16 22:17:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:39,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:40,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:17:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:40,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 22:17:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:40,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-16 22:17:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:17:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-12-16 22:17:40,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:17:40,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618163937] [2021-12-16 22:17:40,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618163937] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:17:40,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019007755] [2021-12-16 22:17:40,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:17:40,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:40,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:17:40,069 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) [2021-12-16 22:17:40,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 22:17:40,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:17:40,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:17:40,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 22:17:40,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:17:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 130 proven. 4 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-12-16 22:17:40,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:17:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-12-16 22:17:40,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019007755] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:17:40,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:17:40,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2021-12-16 22:17:40,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211486456] [2021-12-16 22:17:40,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:17:40,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 22:17:40,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:17:40,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 22:17:40,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:17:40,349 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:17:40,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:17:40,369 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-12-16 22:17:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 22:17:40,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 72 [2021-12-16 22:17:40,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:17:40,371 INFO L225 Difference]: With dead ends: 68 [2021-12-16 22:17:40,371 INFO L226 Difference]: Without dead ends: 47 [2021-12-16 22:17:40,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:17:40,372 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:17:40,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 66 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:17:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-16 22:17:40,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-16 22:17:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:17:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-12-16 22:17:40,383 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 72 [2021-12-16 22:17:40,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:17:40,384 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-12-16 22:17:40,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:17:40,385 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-12-16 22:17:40,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-16 22:17:40,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:17:40,390 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:17:40,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 22:17:40,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:17:40,591 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:17:40,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:17:40,592 INFO L85 PathProgramCache]: Analyzing trace with hash 319930483, now seen corresponding path program 5 times [2021-12-16 22:17:40,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:17:40,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84070435] [2021-12-16 22:17:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:17:40,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:17:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:19:53,999 WARN L227 SmtUtils]: Spent 30.88s on a formula simplification. DAG size of input: 179 DAG size of output: 114 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 22:20:04,382 WARN L227 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 32 DAG size of output: 1 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-16 22:22:06,749 WARN L227 SmtUtils]: Spent 1.08m on a formula simplification. DAG size of input: 165 DAG size of output: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 22:23:14,415 WARN L227 SmtUtils]: Spent 33.54s on a formula simplification. DAG size of input: 126 DAG size of output: 123 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 22:24:25,827 WARN L227 SmtUtils]: Spent 28.93s on a formula simplification. DAG size of input: 133 DAG size of output: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 22:25:33,863 WARN L227 SmtUtils]: Spent 32.88s on a formula simplification. DAG size of input: 128 DAG size of output: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 22:26:30,745 WARN L227 SmtUtils]: Spent 25.07s on a formula simplification. DAG size of input: 125 DAG size of output: 118 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 22:27:32,473 WARN L227 SmtUtils]: Spent 31.38s on a formula simplification. DAG size of input: 129 DAG size of output: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 22:28:30,377 WARN L227 SmtUtils]: Spent 21.60s on a formula simplification. DAG size of input: 134 DAG size of output: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 22:29:41,052 WARN L227 SmtUtils]: Spent 25.80s on a formula simplification. DAG size of input: 134 DAG size of output: 121 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 22:30:52,586 WARN L227 SmtUtils]: Spent 32.97s on a formula simplification. DAG size of input: 123 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-16 22:31:52,428 WARN L227 SmtUtils]: Spent 23.43s on a formula simplification. DAG size of input: 129 DAG size of output: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15