./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash cad2c6f6e8ebe2adcd550e4a56b83be37e52f812ae33bfb645236c6925734dbf --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 13:59:22,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 13:59:22,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 13:59:22,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 13:59:22,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 13:59:22,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 13:59:22,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 13:59:22,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 13:59:22,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 13:59:22,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 13:59:22,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 13:59:22,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 13:59:22,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 13:59:22,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 13:59:22,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 13:59:22,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 13:59:22,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 13:59:22,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 13:59:22,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 13:59:22,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 13:59:22,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 13:59:22,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 13:59:22,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 13:59:22,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 13:59:22,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 13:59:22,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 13:59:22,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 13:59:22,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 13:59:22,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 13:59:22,317 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 13:59:22,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 13:59:22,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 13:59:22,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 13:59:22,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 13:59:22,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 13:59:22,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 13:59:22,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 13:59:22,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 13:59:22,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 13:59:22,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 13:59:22,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 13:59:22,325 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-12-15 13:59:22,345 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 13:59:22,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 13:59:22,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 13:59:22,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 13:59:22,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 13:59:22,347 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 13:59:22,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 13:59:22,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 13:59:22,348 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 13:59:22,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 13:59:22,349 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 13:59:22,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 13:59:22,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 13:59:22,349 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 13:59:22,349 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 13:59:22,350 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-15 13:59:22,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 13:59:22,350 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 13:59:22,350 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 13:59:22,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 13:59:22,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 13:59:22,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 13:59:22,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:59:22,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 13:59:22,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 13:59:22,351 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 13:59:22,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 13:59:22,351 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 13:59:22,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cad2c6f6e8ebe2adcd550e4a56b83be37e52f812ae33bfb645236c6925734dbf [2021-12-15 13:59:22,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 13:59:22,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 13:59:22,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 13:59:22,561 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 13:59:22,562 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 13:59:22,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c [2021-12-15 13:59:22,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2b1d366a/ed4244009b9943629faa2e8bcdec0480/FLAG96a0091f8 [2021-12-15 13:59:22,998 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 13:59:23,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/Arrays01-EquivalentConstantIndices-1.c [2021-12-15 13:59:23,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2b1d366a/ed4244009b9943629faa2e8bcdec0480/FLAG96a0091f8 [2021-12-15 13:59:23,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2b1d366a/ed4244009b9943629faa2e8bcdec0480 [2021-12-15 13:59:23,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 13:59:23,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 13:59:23,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 13:59:23,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 13:59:23,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 13:59:23,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:59:23" (1/1) ... [2021-12-15 13:59:23,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56fb5db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:23, skipping insertion in model container [2021-12-15 13:59:23,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:59:23" (1/1) ... [2021-12-15 13:59:23,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 13:59:23,056 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 13:59:23,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:59:23,217 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 13:59:23,233 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:59:23,248 INFO L208 MainTranslator]: Completed translation [2021-12-15 13:59:23,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:23 WrapperNode [2021-12-15 13:59:23,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 13:59:23,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 13:59:23,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 13:59:23,252 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 13:59:23,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:23" (1/1) ... [2021-12-15 13:59:23,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:23" (1/1) ... [2021-12-15 13:59:23,286 INFO L137 Inliner]: procedures = 8, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2021-12-15 13:59:23,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 13:59:23,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 13:59:23,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 13:59:23,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 13:59:23,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:23" (1/1) ... [2021-12-15 13:59:23,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:23" (1/1) ... [2021-12-15 13:59:23,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:23" (1/1) ... [2021-12-15 13:59:23,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:23" (1/1) ... [2021-12-15 13:59:23,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:23" (1/1) ... [2021-12-15 13:59:23,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:23" (1/1) ... [2021-12-15 13:59:23,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:23" (1/1) ... [2021-12-15 13:59:23,328 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 13:59:23,329 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 13:59:23,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 13:59:23,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 13:59:23,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:23" (1/1) ... [2021-12-15 13:59:23,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:59:23,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:59:23,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 13:59:23,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 13:59:23,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 13:59:23,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 13:59:23,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 13:59:23,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 13:59:23,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 13:59:23,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 13:59:23,511 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 13:59:23,512 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 13:59:23,672 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 13:59:23,677 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 13:59:23,677 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 13:59:23,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:59:23 BoogieIcfgContainer [2021-12-15 13:59:23,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 13:59:23,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 13:59:23,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 13:59:23,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 13:59:23,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 01:59:23" (1/3) ... [2021-12-15 13:59:23,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ec7d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:59:23, skipping insertion in model container [2021-12-15 13:59:23,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:59:23" (2/3) ... [2021-12-15 13:59:23,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ec7d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:59:23, skipping insertion in model container [2021-12-15 13:59:23,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:59:23" (3/3) ... [2021-12-15 13:59:23,692 INFO L111 eAbstractionObserver]: Analyzing ICFG Arrays01-EquivalentConstantIndices-1.c [2021-12-15 13:59:23,696 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 13:59:23,696 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-12-15 13:59:23,758 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 13:59:23,764 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 13:59:23,764 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-12-15 13:59:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:23,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-15 13:59:23,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:23,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-15 13:59:23,788 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:59:23,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:23,797 INFO L85 PathProgramCache]: Analyzing trace with hash 926025, now seen corresponding path program 1 times [2021-12-15 13:59:23,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:59:23,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569816836] [2021-12-15 13:59:23,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:23,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:59:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:23,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:59:23,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569816836] [2021-12-15 13:59:23,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569816836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:23,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:23,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:59:23,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956123897] [2021-12-15 13:59:23,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:23,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 13:59:23,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:59:23,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 13:59:23,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 13:59:23,963 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:23,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:23,972 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-12-15 13:59:23,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 13:59:23,975 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-12-15 13:59:23,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:23,980 INFO L225 Difference]: With dead ends: 24 [2021-12-15 13:59:23,980 INFO L226 Difference]: Without dead ends: 22 [2021-12-15 13:59:23,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 13:59:23,985 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:23,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:59:24,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-15 13:59:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-15 13:59:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 21 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) [2021-12-15 13:59:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-12-15 13:59:24,014 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 4 [2021-12-15 13:59:24,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:24,014 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-12-15 13:59:24,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,015 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-12-15 13:59:24,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-15 13:59:24,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:24,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-15 13:59:24,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 13:59:24,017 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:59:24,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:24,021 INFO L85 PathProgramCache]: Analyzing trace with hash 925715, now seen corresponding path program 1 times [2021-12-15 13:59:24,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:59:24,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697754186] [2021-12-15 13:59:24,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:24,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:59:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:24,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:59:24,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697754186] [2021-12-15 13:59:24,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697754186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:24,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:24,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 13:59:24,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176849240] [2021-12-15 13:59:24,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:24,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:59:24,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:59:24,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:59:24,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:59:24,093 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:24,130 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-12-15 13:59:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:59:24,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-12-15 13:59:24,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:24,132 INFO L225 Difference]: With dead ends: 28 [2021-12-15 13:59:24,132 INFO L226 Difference]: Without dead ends: 28 [2021-12-15 13:59:24,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:59:24,133 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:24,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:59:24,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-15 13:59:24,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-12-15 13:59:24,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-12-15 13:59:24,138 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 4 [2021-12-15 13:59:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:24,139 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-12-15 13:59:24,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-12-15 13:59:24,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-15 13:59:24,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:24,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-15 13:59:24,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 13:59:24,140 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:59:24,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:24,141 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-12-15 13:59:24,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:59:24,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389081661] [2021-12-15 13:59:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:24,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:59:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:24,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:59:24,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389081661] [2021-12-15 13:59:24,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389081661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:24,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:24,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:59:24,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805140905] [2021-12-15 13:59:24,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:24,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:59:24,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:59:24,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:59:24,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:59:24,196 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:24,226 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-12-15 13:59:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:59:24,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-12-15 13:59:24,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:24,228 INFO L225 Difference]: With dead ends: 19 [2021-12-15 13:59:24,228 INFO L226 Difference]: Without dead ends: 19 [2021-12-15 13:59:24,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:59:24,234 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:24,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:59:24,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-15 13:59:24,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-15 13:59:24,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-12-15 13:59:24,241 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2021-12-15 13:59:24,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:24,242 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-12-15 13:59:24,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,242 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-12-15 13:59:24,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-15 13:59:24,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:24,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-15 13:59:24,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 13:59:24,243 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:59:24,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:24,244 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-12-15 13:59:24,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:59:24,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188032011] [2021-12-15 13:59:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:24,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:59:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:24,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:59:24,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188032011] [2021-12-15 13:59:24,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188032011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:24,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:59:24,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:59:24,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103428837] [2021-12-15 13:59:24,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:24,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 13:59:24,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:59:24,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 13:59:24,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:59:24,300 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:24,323 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-12-15 13:59:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 13:59:24,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-12-15 13:59:24,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:24,326 INFO L225 Difference]: With dead ends: 22 [2021-12-15 13:59:24,326 INFO L226 Difference]: Without dead ends: 22 [2021-12-15 13:59:24,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 13:59:24,334 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:24,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:59:24,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-15 13:59:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-12-15 13:59:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-12-15 13:59:24,344 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 4 [2021-12-15 13:59:24,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:24,344 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-12-15 13:59:24,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,345 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-12-15 13:59:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 13:59:24,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:24,345 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:24,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 13:59:24,346 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:59:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:24,347 INFO L85 PathProgramCache]: Analyzing trace with hash 264435863, now seen corresponding path program 1 times [2021-12-15 13:59:24,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:59:24,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395163900] [2021-12-15 13:59:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:24,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:59:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:24,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:59:24,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395163900] [2021-12-15 13:59:24,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395163900] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:59:24,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856941700] [2021-12-15 13:59:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:24,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:59:24,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:59:24,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:59:24,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 13:59:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:24,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 13:59:24,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:24,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:59:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:24,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856941700] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:59:24,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:59:24,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 13:59:24,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858400612] [2021-12-15 13:59:24,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:59:24,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 13:59:24,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:59:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 13:59:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:59:24,555 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:24,581 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-12-15 13:59:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 13:59:24,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-15 13:59:24,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:24,582 INFO L225 Difference]: With dead ends: 33 [2021-12-15 13:59:24,582 INFO L226 Difference]: Without dead ends: 33 [2021-12-15 13:59:24,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 13:59:24,583 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:24,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 42 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:59:24,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-15 13:59:24,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-12-15 13:59:24,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-12-15 13:59:24,586 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 8 [2021-12-15 13:59:24,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:24,586 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-12-15 13:59:24,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-12-15 13:59:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 13:59:24,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:24,587 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:24,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 13:59:24,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:59:24,804 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:59:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:24,805 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2021-12-15 13:59:24,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:59:24,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648940753] [2021-12-15 13:59:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:24,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:59:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:24,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:59:24,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648940753] [2021-12-15 13:59:24,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648940753] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:59:24,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624362893] [2021-12-15 13:59:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:24,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:59:24,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:59:24,912 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:59:24,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 13:59:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:24,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-15 13:59:24,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:24,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-15 13:59:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:25,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:59:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:25,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624362893] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:59:25,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:59:25,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-12-15 13:59:25,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678763662] [2021-12-15 13:59:25,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:59:25,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 13:59:25,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:59:25,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 13:59:25,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-15 13:59:25,160 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) [2021-12-15 13:59:25,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:25,225 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-12-15 13:59:25,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 13:59:25,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) Word has length 8 [2021-12-15 13:59:25,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:25,226 INFO L225 Difference]: With dead ends: 27 [2021-12-15 13:59:25,226 INFO L226 Difference]: Without dead ends: 27 [2021-12-15 13:59:25,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-12-15 13:59:25,227 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:25,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:59:25,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-15 13:59:25,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-15 13:59:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-12-15 13:59:25,230 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 8 [2021-12-15 13:59:25,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:25,230 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-12-15 13:59:25,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 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) [2021-12-15 13:59:25,230 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-12-15 13:59:25,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 13:59:25,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:25,231 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:25,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 13:59:25,439 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,SelfDestructingSolverStorable5 [2021-12-15 13:59:25,440 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:59:25,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:25,440 INFO L85 PathProgramCache]: Analyzing trace with hash 868272224, now seen corresponding path program 1 times [2021-12-15 13:59:25,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:59:25,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388861660] [2021-12-15 13:59:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:25,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:59:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:25,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:59:25,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388861660] [2021-12-15 13:59:25,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388861660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:59:25,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653272055] [2021-12-15 13:59:25,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:25,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:59:25,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:59:25,516 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:59:25,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 13:59:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:25,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 13:59:25,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:25,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:59:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:25,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653272055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:59:25,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:59:25,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-15 13:59:25,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611431434] [2021-12-15 13:59:25,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:59:25,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 13:59:25,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:59:25,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 13:59:25,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-15 13:59:25,786 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:25,834 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-12-15 13:59:25,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 13:59:25,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 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 23 [2021-12-15 13:59:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:25,835 INFO L225 Difference]: With dead ends: 51 [2021-12-15 13:59:25,835 INFO L226 Difference]: Without dead ends: 51 [2021-12-15 13:59:25,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-15 13:59:25,836 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:25,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 48 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:59:25,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-15 13:59:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-15 13:59:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-12-15 13:59:25,840 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 23 [2021-12-15 13:59:25,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:25,840 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-12-15 13:59:25,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-12-15 13:59:25,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 13:59:25,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:25,841 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:25,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 13:59:26,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:59:26,049 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:59:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:26,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1708005006, now seen corresponding path program 2 times [2021-12-15 13:59:26,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:59:26,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289842389] [2021-12-15 13:59:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:26,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:59:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:59:26,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:59:26,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289842389] [2021-12-15 13:59:26,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289842389] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:59:26,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676956575] [2021-12-15 13:59:26,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:59:26,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:59:26,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:59:26,185 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:59:26,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 13:59:26,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-15 13:59:26,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:59:26,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 13:59:26,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-15 13:59:26,523 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:26,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676956575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:26,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 13:59:26,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2021-12-15 13:59:26,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817228741] [2021-12-15 13:59:26,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:26,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:59:26,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:59:26,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:59:26,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-12-15 13:59:26,525 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) 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) [2021-12-15 13:59:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:26,526 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-12-15 13:59:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:59:26,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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 47 [2021-12-15 13:59:26,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:26,527 INFO L225 Difference]: With dead ends: 56 [2021-12-15 13:59:26,527 INFO L226 Difference]: Without dead ends: 54 [2021-12-15 13:59:26,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-12-15 13:59:26,528 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:26,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2021-12-15 13:59:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-15 13:59:26,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-12-15 13:59:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:26,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-12-15 13:59:26,531 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 47 [2021-12-15 13:59:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:26,531 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-12-15 13:59:26,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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) [2021-12-15 13:59:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-12-15 13:59:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-15 13:59:26,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:26,533 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:26,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 13:59:26,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:59:26,752 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:59:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash 962364987, now seen corresponding path program 1 times [2021-12-15 13:59:26,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:59:26,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394470563] [2021-12-15 13:59:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:26,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:59:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:59:26,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:59:26,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394470563] [2021-12-15 13:59:26,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394470563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:59:26,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173376432] [2021-12-15 13:59:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:26,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:59:26,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:59:26,907 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:59:26,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 13:59:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:26,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 13:59:26,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:59:27,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 13:59:27,272 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:59:27,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173376432] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 13:59:27,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 13:59:27,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-15 13:59:27,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628760277] [2021-12-15 13:59:27,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 13:59:27,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 13:59:27,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:59:27,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 13:59:27,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-15 13:59:27,274 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:27,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:27,371 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2021-12-15 13:59:27,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 13:59:27,371 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-15 13:59:27,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:27,372 INFO L225 Difference]: With dead ends: 101 [2021-12-15 13:59:27,372 INFO L226 Difference]: Without dead ends: 101 [2021-12-15 13:59:27,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-15 13:59:27,373 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:27,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 70 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 13:59:27,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-15 13:59:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-12-15 13:59:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-12-15 13:59:27,378 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 52 [2021-12-15 13:59:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:27,378 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-12-15 13:59:27,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 25 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-12-15 13:59:27,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-15 13:59:27,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:59:27,380 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:27,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 13:59:27,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:59:27,600 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-15 13:59:27,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:59:27,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1197015391, now seen corresponding path program 2 times [2021-12-15 13:59:27,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:59:27,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348363339] [2021-12-15 13:59:27,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:59:27,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:59:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:59:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 13:59:27,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:59:27,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348363339] [2021-12-15 13:59:27,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348363339] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 13:59:27,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448061616] [2021-12-15 13:59:27,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 13:59:27,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:59:27,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:59:27,910 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 13:59:27,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 13:59:27,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-15 13:59:27,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 13:59:27,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 13:59:27,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:59:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2021-12-15 13:59:28,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:59:28,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448061616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:59:28,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 13:59:28,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [25] total 27 [2021-12-15 13:59:28,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323666953] [2021-12-15 13:59:28,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:59:28,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 13:59:28,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:59:28,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 13:59:28,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2021-12-15 13:59:28,439 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:28,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:59:28,440 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-12-15 13:59:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 13:59:28,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-12-15 13:59:28,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:59:28,441 INFO L225 Difference]: With dead ends: 100 [2021-12-15 13:59:28,441 INFO L226 Difference]: Without dead ends: 0 [2021-12-15 13:59:28,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2021-12-15 13:59:28,442 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:59:28,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2021-12-15 13:59:28,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-15 13:59:28,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-15 13:59:28,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:28,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-15 13:59:28,443 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2021-12-15 13:59:28,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:59:28,443 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-15 13:59:28,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:59:28,443 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-15 13:59:28,443 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-15 13:59:28,445 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (8 of 9 remaining) [2021-12-15 13:59:28,446 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (7 of 9 remaining) [2021-12-15 13:59:28,446 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (6 of 9 remaining) [2021-12-15 13:59:28,446 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (5 of 9 remaining) [2021-12-15 13:59:28,446 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (4 of 9 remaining) [2021-12-15 13:59:28,446 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (3 of 9 remaining) [2021-12-15 13:59:28,446 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (2 of 9 remaining) [2021-12-15 13:59:28,446 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (1 of 9 remaining) [2021-12-15 13:59:28,447 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2021-12-15 13:59:28,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-15 13:59:28,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 13:59:28,663 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2021-12-15 13:59:28,666 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 13:59:28,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 01:59:28 BoogieIcfgContainer [2021-12-15 13:59:28,669 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 13:59:28,670 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 13:59:28,670 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 13:59:28,670 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 13:59:28,671 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:59:23" (3/4) ... [2021-12-15 13:59:28,674 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-15 13:59:28,685 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-12-15 13:59:28,686 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-15 13:59:28,686 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-15 13:59:28,686 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-15 13:59:28,716 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-15 13:59:28,716 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 13:59:28,717 INFO L158 Benchmark]: Toolchain (without parser) took 5680.35ms. Allocated memory was 115.3MB in the beginning and 144.7MB in the end (delta: 29.4MB). Free memory was 88.7MB in the beginning and 92.3MB in the end (delta: -3.6MB). Peak memory consumption was 26.0MB. Max. memory is 16.1GB. [2021-12-15 13:59:28,717 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 81.8MB. Free memory is still 43.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 13:59:28,718 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.18ms. Allocated memory is still 115.3MB. Free memory was 88.4MB in the beginning and 92.9MB in the end (delta: -4.5MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2021-12-15 13:59:28,718 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.50ms. Allocated memory is still 115.3MB. Free memory was 92.9MB in the beginning and 91.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 13:59:28,718 INFO L158 Benchmark]: Boogie Preprocessor took 39.77ms. Allocated memory is still 115.3MB. Free memory was 91.5MB in the beginning and 90.5MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 13:59:28,719 INFO L158 Benchmark]: RCFGBuilder took 349.95ms. Allocated memory is still 115.3MB. Free memory was 90.2MB in the beginning and 80.7MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 13:59:28,719 INFO L158 Benchmark]: TraceAbstraction took 4988.89ms. Allocated memory was 115.3MB in the beginning and 144.7MB in the end (delta: 29.4MB). Free memory was 80.1MB in the beginning and 94.2MB in the end (delta: -14.2MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. [2021-12-15 13:59:28,719 INFO L158 Benchmark]: Witness Printer took 46.45ms. Allocated memory is still 144.7MB. Free memory was 94.2MB in the beginning and 92.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 13:59:28,721 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 81.8MB. Free memory is still 43.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 212.18ms. Allocated memory is still 115.3MB. Free memory was 88.4MB in the beginning and 92.9MB in the end (delta: -4.5MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.50ms. Allocated memory is still 115.3MB. Free memory was 92.9MB in the beginning and 91.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.77ms. Allocated memory is still 115.3MB. Free memory was 91.5MB in the beginning and 90.5MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 349.95ms. Allocated memory is still 115.3MB. Free memory was 90.2MB in the beginning and 80.7MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4988.89ms. Allocated memory was 115.3MB in the beginning and 144.7MB in the end (delta: 29.4MB). Free memory was 80.1MB in the beginning and 94.2MB in the end (delta: -14.2MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. * Witness Printer took 46.45ms. Allocated memory is still 144.7MB. Free memory was 94.2MB in the beginning and 92.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 14]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 10]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 4.9s, OverallIterations: 10, TraceHistogramMax: 22, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 178 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 178 mSDsluCounter, 321 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 19 IncrementalHoareTripleChecker+Unchecked, 184 mSDsCounter, 41 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 211 IncrementalHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 41 mSolverCounterUnsat, 137 mSDtfsCounter, 211 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 396 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=9, InterpolantAutomatonStates: 68, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 10 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 492 NumberOfCodeBlocks, 359 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 563 ConstructedInterpolants, 143 QuantifiedInterpolants, 3190 SizeOfPredicates, 0 NumberOfNonLiveVariables, 452 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 20 InterpolantComputations, 6 PerfectInterpolantSequences, 1146/2945 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-15 13:59:28,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE