./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_vararg_ground.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/array-examples/standard_vararg_ground.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 28ac72543f751666908cbd68a77fa11ffe4dd886016c3996df45b97bb42d5078 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 21:58:38,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 21:58:38,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 21:58:38,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 21:58:38,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 21:58:38,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 21:58:38,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 21:58:38,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 21:58:38,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 21:58:38,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 21:58:38,462 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 21:58:38,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 21:58:38,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 21:58:38,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 21:58:38,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 21:58:38,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 21:58:38,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 21:58:38,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 21:58:38,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 21:58:38,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 21:58:38,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 21:58:38,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 21:58:38,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 21:58:38,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 21:58:38,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 21:58:38,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 21:58:38,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 21:58:38,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 21:58:38,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 21:58:38,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 21:58:38,483 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 21:58:38,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 21:58:38,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 21:58:38,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 21:58:38,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 21:58:38,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 21:58:38,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 21:58:38,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 21:58:38,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 21:58:38,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 21:58:38,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 21:58:38,489 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 21:58:38,514 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 21:58:38,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 21:58:38,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 21:58:38,515 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 21:58:38,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 21:58:38,515 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 21:58:38,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 21:58:38,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 21:58:38,516 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 21:58:38,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 21:58:38,517 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 21:58:38,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 21:58:38,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 21:58:38,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 21:58:38,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 21:58:38,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 21:58:38,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 21:58:38,518 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 21:58:38,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 21:58:38,518 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 21:58:38,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 21:58:38,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 21:58:38,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 21:58:38,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 21:58:38,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 21:58:38,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 21:58:38,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 21:58:38,519 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 21:58:38,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 21:58:38,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 21:58:38,520 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 21:58:38,520 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 21:58:38,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 21:58:38,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 21:58:38,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28ac72543f751666908cbd68a77fa11ffe4dd886016c3996df45b97bb42d5078 [2021-12-16 21:58:38,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 21:58:38,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 21:58:38,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 21:58:38,746 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 21:58:38,747 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 21:58:38,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_vararg_ground.i [2021-12-16 21:58:38,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b0dd60e5/ef4a0d0a49214c25ada5d6c06b88c91f/FLAG8c9cdd578 [2021-12-16 21:58:39,130 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 21:58:39,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_vararg_ground.i [2021-12-16 21:58:39,151 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b0dd60e5/ef4a0d0a49214c25ada5d6c06b88c91f/FLAG8c9cdd578 [2021-12-16 21:58:39,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b0dd60e5/ef4a0d0a49214c25ada5d6c06b88c91f [2021-12-16 21:58:39,547 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 21:58:39,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 21:58:39,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 21:58:39,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 21:58:39,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 21:58:39,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:58:39" (1/1) ... [2021-12-16 21:58:39,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bfa2646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:58:39, skipping insertion in model container [2021-12-16 21:58:39,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:58:39" (1/1) ... [2021-12-16 21:58:39,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 21:58:39,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 21:58:39,709 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_vararg_ground.i[815,828] [2021-12-16 21:58:39,720 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 21:58:39,725 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 21:58:39,734 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_vararg_ground.i[815,828] [2021-12-16 21:58:39,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 21:58:39,750 INFO L208 MainTranslator]: Completed translation [2021-12-16 21:58:39,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:58:39 WrapperNode [2021-12-16 21:58:39,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 21:58:39,752 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 21:58:39,752 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 21:58:39,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 21:58:39,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:58:39" (1/1) ... [2021-12-16 21:58:39,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:58:39" (1/1) ... [2021-12-16 21:58:39,775 INFO L137 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2021-12-16 21:58:39,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 21:58:39,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 21:58:39,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 21:58:39,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 21:58:39,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:58:39" (1/1) ... [2021-12-16 21:58:39,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:58:39" (1/1) ... [2021-12-16 21:58:39,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:58:39" (1/1) ... [2021-12-16 21:58:39,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:58:39" (1/1) ... [2021-12-16 21:58:39,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:58:39" (1/1) ... [2021-12-16 21:58:39,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:58:39" (1/1) ... [2021-12-16 21:58:39,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:58:39" (1/1) ... [2021-12-16 21:58:39,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 21:58:39,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 21:58:39,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 21:58:39,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 21:58:39,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:58:39" (1/1) ... [2021-12-16 21:58:39,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 21:58:39,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:58:39,833 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 21:58:39,851 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 21:58:39,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 21:58:39,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 21:58:39,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 21:58:39,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 21:58:39,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 21:58:39,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 21:58:39,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 21:58:39,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 21:58:39,909 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 21:58:39,911 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 21:58:40,020 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 21:58:40,024 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 21:58:40,024 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 21:58:40,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:58:40 BoogieIcfgContainer [2021-12-16 21:58:40,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 21:58:40,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 21:58:40,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 21:58:40,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 21:58:40,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 09:58:39" (1/3) ... [2021-12-16 21:58:40,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211ff63b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:58:40, skipping insertion in model container [2021-12-16 21:58:40,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:58:39" (2/3) ... [2021-12-16 21:58:40,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211ff63b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 09:58:40, skipping insertion in model container [2021-12-16 21:58:40,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:58:40" (3/3) ... [2021-12-16 21:58:40,036 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_vararg_ground.i [2021-12-16 21:58:40,040 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 21:58:40,040 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 21:58:40,086 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 21:58:40,093 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 21:58:40,093 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 21:58:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-16 21:58:40,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:58:40,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:58:40,116 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:58:40,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:58:40,121 INFO L85 PathProgramCache]: Analyzing trace with hash 221467647, now seen corresponding path program 1 times [2021-12-16 21:58:40,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:58:40,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252375533] [2021-12-16 21:58:40,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:58:40,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:58:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:58:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 21:58:40,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:58:40,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252375533] [2021-12-16 21:58:40,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252375533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 21:58:40,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 21:58:40,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 21:58:40,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086542747] [2021-12-16 21:58:40,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 21:58:40,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 21:58:40,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:58:40,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 21:58:40,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 21:58:40,299 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:40,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:58:40,332 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2021-12-16 21:58:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 21:58:40,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-16 21:58:40,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:58:40,339 INFO L225 Difference]: With dead ends: 32 [2021-12-16 21:58:40,339 INFO L226 Difference]: Without dead ends: 15 [2021-12-16 21:58:40,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 21:58:40,346 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 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 21:58:40,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 21:58:40,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-16 21:58:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-12-16 21:58:40,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:40,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-16 21:58:40,369 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-12-16 21:58:40,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:58:40,369 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-16 21:58:40,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:40,371 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-16 21:58:40,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 21:58:40,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:58:40,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:58:40,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 21:58:40,372 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:58:40,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:58:40,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1650471280, now seen corresponding path program 1 times [2021-12-16 21:58:40,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:58:40,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337122404] [2021-12-16 21:58:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:58:40,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:58:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:58:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 21:58:40,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:58:40,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337122404] [2021-12-16 21:58:40,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337122404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:58:40,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717352463] [2021-12-16 21:58:40,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:58:40,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:58:40,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:58:40,442 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 21:58:40,443 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 21:58:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:58:40,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 21:58:40,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:58:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 21:58:40,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:58:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 21:58:40,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717352463] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:58:40,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:58:40,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-16 21:58:40,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186307985] [2021-12-16 21:58:40,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:58:40,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 21:58:40,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:58:40,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 21:58:40,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 21:58:40,597 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:58:40,622 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2021-12-16 21:58:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 21:58:40,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 21:58:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:58:40,626 INFO L225 Difference]: With dead ends: 29 [2021-12-16 21:58:40,626 INFO L226 Difference]: Without dead ends: 20 [2021-12-16 21:58:40,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-16 21:58:40,628 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 21:58:40,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 21:58:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-16 21:58:40,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-16 21:58:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-12-16 21:58:40,641 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2021-12-16 21:58:40,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:58:40,642 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-12-16 21:58:40,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:40,642 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-12-16 21:58:40,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 21:58:40,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:58:40,643 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:58:40,662 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 21:58:40,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:58:40,855 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:58:40,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:58:40,856 INFO L85 PathProgramCache]: Analyzing trace with hash 77278250, now seen corresponding path program 2 times [2021-12-16 21:58:40,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:58:40,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289494092] [2021-12-16 21:58:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:58:40,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:58:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:58:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 21:58:40,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:58:40,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289494092] [2021-12-16 21:58:40,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289494092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 21:58:40,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 21:58:40,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 21:58:40,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099421032] [2021-12-16 21:58:40,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 21:58:40,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 21:58:40,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:58:40,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 21:58:40,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 21:58:40,940 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:40,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:58:40,953 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-16 21:58:40,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 21:58:40,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-16 21:58:40,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:58:40,955 INFO L225 Difference]: With dead ends: 30 [2021-12-16 21:58:40,955 INFO L226 Difference]: Without dead ends: 22 [2021-12-16 21:58:40,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 21:58:40,957 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 21:58:40,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 21:58:40,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-16 21:58:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-16 21:58:40,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-12-16 21:58:40,963 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2021-12-16 21:58:40,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:58:40,963 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-12-16 21:58:40,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:40,964 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-12-16 21:58:40,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-16 21:58:40,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:58:40,964 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:58:40,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 21:58:40,965 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:58:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:58:40,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1540928625, now seen corresponding path program 1 times [2021-12-16 21:58:40,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:58:40,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832356686] [2021-12-16 21:58:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:58:40,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:58:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:58:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 21:58:41,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:58:41,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832356686] [2021-12-16 21:58:41,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832356686] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:58:41,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349975600] [2021-12-16 21:58:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:58:41,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:58:41,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:58:41,035 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 21:58:41,036 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 21:58:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:58:41,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 21:58:41,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:58:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 21:58:41,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:58:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 21:58:41,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349975600] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:58:41,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:58:41,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-16 21:58:41,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530143311] [2021-12-16 21:58:41,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:58:41,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 21:58:41,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:58:41,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 21:58:41,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-16 21:58:41,176 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:41,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:58:41,201 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-12-16 21:58:41,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 21:58:41,202 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-16 21:58:41,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:58:41,203 INFO L225 Difference]: With dead ends: 45 [2021-12-16 21:58:41,203 INFO L226 Difference]: Without dead ends: 34 [2021-12-16 21:58:41,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-16 21:58:41,204 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 21:58:41,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 46 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 21:58:41,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-16 21:58:41,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-16 21:58:41,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-12-16 21:58:41,207 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 19 [2021-12-16 21:58:41,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:58:41,208 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-12-16 21:58:41,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:41,208 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-12-16 21:58:41,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-16 21:58:41,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:58:41,209 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:58:41,227 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 21:58:41,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-16 21:58:41,426 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:58:41,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:58:41,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1100375677, now seen corresponding path program 2 times [2021-12-16 21:58:41,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:58:41,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983247831] [2021-12-16 21:58:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:58:41,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:58:41,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:58:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 21:58:41,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:58:41,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983247831] [2021-12-16 21:58:41,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983247831] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:58:41,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383126666] [2021-12-16 21:58:41,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 21:58:41,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:58:41,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:58:41,572 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 21:58:41,573 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 21:58:41,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 21:58:41,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:58:41,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 21:58:41,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:58:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 21:58:41,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:58:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 21:58:41,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383126666] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:58:41,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:58:41,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-16 21:58:41,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540299903] [2021-12-16 21:58:41,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:58:41,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 21:58:41,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:58:41,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 21:58:41,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-16 21:58:41,966 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:58:42,046 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2021-12-16 21:58:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 21:58:42,046 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-16 21:58:42,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:58:42,047 INFO L225 Difference]: With dead ends: 69 [2021-12-16 21:58:42,047 INFO L226 Difference]: Without dead ends: 58 [2021-12-16 21:58:42,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-16 21:58:42,048 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 21:58:42,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 79 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 21:58:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-16 21:58:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-16 21:58:42,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-12-16 21:58:42,054 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2021-12-16 21:58:42,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:58:42,054 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-12-16 21:58:42,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:42,055 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-12-16 21:58:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 21:58:42,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:58:42,056 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:58:42,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 21:58:42,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:58:42,265 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:58:42,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:58:42,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1124643989, now seen corresponding path program 3 times [2021-12-16 21:58:42,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:58:42,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648900393] [2021-12-16 21:58:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:58:42,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:58:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:58:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 21:58:42,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:58:42,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648900393] [2021-12-16 21:58:42,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648900393] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:58:42,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079392424] [2021-12-16 21:58:42,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 21:58:42,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:58:42,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:58:42,586 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 21:58:42,587 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 21:58:42,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 21:58:42,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:58:42,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 21:58:42,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:58:42,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 21:58:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-16 21:58:43,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:58:43,097 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-12-16 21:58:43,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2021-12-16 21:58:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-16 21:58:43,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079392424] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:58:43,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:58:43,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 34 [2021-12-16 21:58:43,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671420162] [2021-12-16 21:58:43,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:58:43,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 21:58:43,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:58:43,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 21:58:43,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=795, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 21:58:43,185 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:43,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:58:43,660 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2021-12-16 21:58:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 21:58:43,661 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-16 21:58:43,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:58:43,661 INFO L225 Difference]: With dead ends: 77 [2021-12-16 21:58:43,661 INFO L226 Difference]: Without dead ends: 66 [2021-12-16 21:58:43,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=969, Invalid=2571, Unknown=0, NotChecked=0, Total=3540 [2021-12-16 21:58:43,663 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 21:58:43,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 71 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 21:58:43,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-16 21:58:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2021-12-16 21:58:43,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:43,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-12-16 21:58:43,668 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 55 [2021-12-16 21:58:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:58:43,668 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-12-16 21:58:43,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:43,669 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-12-16 21:58:43,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 21:58:43,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:58:43,670 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:58:43,697 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 21:58:43,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:58:43,889 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:58:43,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:58:43,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1539427871, now seen corresponding path program 1 times [2021-12-16 21:58:43,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:58:43,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124181696] [2021-12-16 21:58:43,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:58:43,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:58:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:58:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 21:58:44,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:58:44,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124181696] [2021-12-16 21:58:44,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124181696] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:58:44,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539651609] [2021-12-16 21:58:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:58:44,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:58:44,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:58:44,180 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 21:58:44,221 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 21:58:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:58:44,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 21:58:44,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:58:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 21:58:44,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:58:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 21:58:45,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539651609] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:58:45,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:58:45,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2021-12-16 21:58:45,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133494254] [2021-12-16 21:58:45,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:58:45,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-16 21:58:45,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:58:45,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-16 21:58:45,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-16 21:58:45,056 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 51 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:45,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:58:45,166 INFO L93 Difference]: Finished difference Result 125 states and 153 transitions. [2021-12-16 21:58:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-16 21:58:45,166 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 51 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-16 21:58:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:58:45,170 INFO L225 Difference]: With dead ends: 125 [2021-12-16 21:58:45,171 INFO L226 Difference]: Without dead ends: 112 [2021-12-16 21:58:45,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-16 21:58:45,172 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 21:58:45,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 46 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 21:58:45,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-16 21:58:45,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-12-16 21:58:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2021-12-16 21:58:45,192 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 61 [2021-12-16 21:58:45,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:58:45,192 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2021-12-16 21:58:45,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.156862745098039) internal successors, (110), 51 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:45,193 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2021-12-16 21:58:45,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-16 21:58:45,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:58:45,196 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:58:45,222 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 21:58:45,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:58:45,408 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:58:45,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:58:45,408 INFO L85 PathProgramCache]: Analyzing trace with hash 236610605, now seen corresponding path program 2 times [2021-12-16 21:58:45,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:58:45,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050187135] [2021-12-16 21:58:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:58:45,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:58:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:58:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 21:58:46,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:58:46,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050187135] [2021-12-16 21:58:46,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050187135] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:58:46,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703254687] [2021-12-16 21:58:46,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 21:58:46,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:58:46,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:58:46,275 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 21:58:46,276 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 21:58:46,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 21:58:46,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:58:46,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-16 21:58:46,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:58:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 21:58:46,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:58:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2308 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 21:58:48,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703254687] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:58:48,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:58:48,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2021-12-16 21:58:48,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599585829] [2021-12-16 21:58:48,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:58:48,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-16 21:58:48,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:58:48,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-16 21:58:48,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-16 21:58:48,834 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 101 states, 101 states have (on average 2.0792079207920793) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:49,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:58:49,080 INFO L93 Difference]: Finished difference Result 225 states and 278 transitions. [2021-12-16 21:58:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-16 21:58:49,081 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0792079207920793) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-16 21:58:49,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:58:49,082 INFO L225 Difference]: With dead ends: 225 [2021-12-16 21:58:49,082 INFO L226 Difference]: Without dead ends: 212 [2021-12-16 21:58:49,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-16 21:58:49,086 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 98 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 21:58:49,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 90 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 21:58:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-16 21:58:49,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-12-16 21:58:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.014218009478673) internal successors, (214), 211 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2021-12-16 21:58:49,102 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 111 [2021-12-16 21:58:49,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:58:49,103 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2021-12-16 21:58:49,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0792079207920793) internal successors, (210), 101 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:49,103 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2021-12-16 21:58:49,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-16 21:58:49,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:58:49,108 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:58:49,128 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 21:58:49,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:58:49,326 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:58:49,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:58:49,327 INFO L85 PathProgramCache]: Analyzing trace with hash -760163895, now seen corresponding path program 3 times [2021-12-16 21:58:49,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:58:49,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749743436] [2021-12-16 21:58:49,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:58:49,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:58:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:58:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9608 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 21:58:52,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:58:52,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749743436] [2021-12-16 21:58:52,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749743436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:58:52,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011805026] [2021-12-16 21:58:52,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 21:58:52,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:58:52,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:58:52,212 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 21:58:52,213 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 21:58:52,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 21:58:52,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:58:52,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 21:58:52,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:58:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9608 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2021-12-16 21:58:52,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:58:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9608 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2021-12-16 21:58:53,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011805026] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:58:53,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:58:53,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 6, 6] total 107 [2021-12-16 21:58:53,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424153919] [2021-12-16 21:58:53,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:58:53,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-16 21:58:53,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:58:53,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-16 21:58:53,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6272, Unknown=0, NotChecked=0, Total=11342 [2021-12-16 21:58:53,095 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand has 107 states, 107 states have (on average 2.1401869158878504) internal successors, (229), 107 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:56,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:58:56,453 INFO L93 Difference]: Finished difference Result 236 states and 241 transitions. [2021-12-16 21:58:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-12-16 21:58:56,453 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.1401869158878504) internal successors, (229), 107 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-12-16 21:58:56,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:58:56,454 INFO L225 Difference]: With dead ends: 236 [2021-12-16 21:58:56,455 INFO L226 Difference]: Without dead ends: 217 [2021-12-16 21:58:56,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5547 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15267, Invalid=26963, Unknown=0, NotChecked=0, Total=42230 [2021-12-16 21:58:56,460 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 205 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 21:58:56,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 73 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 21:58:56,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-16 21:58:56,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2021-12-16 21:58:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.013953488372093) internal successors, (218), 215 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2021-12-16 21:58:56,467 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 211 [2021-12-16 21:58:56,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:58:56,468 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2021-12-16 21:58:56,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.1401869158878504) internal successors, (229), 107 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:58:56,469 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2021-12-16 21:58:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-16 21:58:56,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:58:56,470 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:58:56,487 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 21:58:56,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:58:56,687 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:58:56,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:58:56,688 INFO L85 PathProgramCache]: Analyzing trace with hash 643219628, now seen corresponding path program 4 times [2021-12-16 21:58:56,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:58:56,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418790276] [2021-12-16 21:58:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:58:56,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:58:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:58:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9809 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 21:58:59,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:58:59,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418790276] [2021-12-16 21:58:59,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418790276] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:58:59,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765318424] [2021-12-16 21:58:59,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 21:58:59,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:58:59,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:58:59,608 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 21:58:59,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 21:58:59,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 21:58:59,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 21:58:59,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-16 21:58:59,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 21:59:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9809 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 21:59:00,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 21:59:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9809 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 21:59:08,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765318424] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 21:59:08,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 21:59:08,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2021-12-16 21:59:08,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328023298] [2021-12-16 21:59:08,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 21:59:08,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-12-16 21:59:08,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 21:59:08,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-12-16 21:59:08,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-16 21:59:08,300 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand has 203 states, 203 states have (on average 2.039408866995074) internal successors, (414), 203 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:59:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 21:59:08,957 INFO L93 Difference]: Finished difference Result 433 states and 537 transitions. [2021-12-16 21:59:08,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-12-16 21:59:08,958 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.039408866995074) internal successors, (414), 203 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-12-16 21:59:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 21:59:08,960 INFO L225 Difference]: With dead ends: 433 [2021-12-16 21:59:08,960 INFO L226 Difference]: Without dead ends: 418 [2021-12-16 21:59:08,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-16 21:59:08,962 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 200 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 21:59:08,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 79 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 21:59:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-12-16 21:59:08,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2021-12-16 21:59:08,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.0071942446043165) internal successors, (420), 417 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:59:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 420 transitions. [2021-12-16 21:59:08,971 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 420 transitions. Word has length 215 [2021-12-16 21:59:08,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 21:59:08,971 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 420 transitions. [2021-12-16 21:59:08,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.039408866995074) internal successors, (414), 203 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 21:59:08,972 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 420 transitions. [2021-12-16 21:59:08,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-12-16 21:59:08,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 21:59:08,985 INFO L514 BasicCegarLoop]: trace histogram [200, 200, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 21:59:09,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-16 21:59:09,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 21:59:09,212 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 21:59:09,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 21:59:09,212 INFO L85 PathProgramCache]: Analyzing trace with hash -53038942, now seen corresponding path program 5 times [2021-12-16 21:59:09,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 21:59:09,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307860980] [2021-12-16 21:59:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 21:59:09,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 21:59:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 21:59:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 40008 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 21:59:20,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 21:59:20,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307860980] [2021-12-16 21:59:20,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307860980] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 21:59:20,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055902456] [2021-12-16 21:59:20,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 21:59:20,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 21:59:20,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 21:59:20,030 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 21:59:20,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process Killed by 15