./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/diamond_2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/diamond_2-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a7cdc2671d7dcfcceedceb0ed408847d70d2b4e ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 22:19:24,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:19:24,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:19:24,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:19:24,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:19:24,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:19:24,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:19:24,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:19:24,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:19:24,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:19:24,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:19:24,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:19:24,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:19:24,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:19:24,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:19:24,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:19:24,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:19:24,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:19:24,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:19:24,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:19:24,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:19:24,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:19:24,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:19:24,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:19:24,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:19:24,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:19:24,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:19:24,893 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:19:24,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:19:24,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:19:24,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:19:24,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:19:24,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:19:24,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:19:24,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:19:24,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:19:24,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:19:24,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:19:24,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:19:24,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:19:24,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:19:24,911 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:19:24,967 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:19:24,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:19:24,971 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:19:24,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:19:24,971 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:19:24,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:19:24,972 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:19:24,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:19:24,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:19:24,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:19:24,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:19:24,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:19:24,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:19:24,975 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:19:24,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:19:24,975 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:19:24,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:19:24,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:19:24,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:19:24,976 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:19:24,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:19:24,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:19:24,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:19:24,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:19:24,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:19:24,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:19:24,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:19:24,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:19:24,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:19:24,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a7cdc2671d7dcfcceedceb0ed408847d70d2b4e [2020-10-25 22:19:25,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:19:25,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:19:25,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:19:25,469 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:19:25,470 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:19:25,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/diamond_2-2.c [2020-10-25 22:19:25,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/902e17209/a99d3e5ce5f54625866665c3e3b68955/FLAG0c3a01d38 [2020-10-25 22:19:26,147 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:19:26,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_2-2.c [2020-10-25 22:19:26,158 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/902e17209/a99d3e5ce5f54625866665c3e3b68955/FLAG0c3a01d38 [2020-10-25 22:19:26,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/902e17209/a99d3e5ce5f54625866665c3e3b68955 [2020-10-25 22:19:26,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:19:26,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:19:26,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:19:26,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:19:26,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:19:26,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:19:26" (1/1) ... [2020-10-25 22:19:26,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b3ecbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:26, skipping insertion in model container [2020-10-25 22:19:26,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:19:26" (1/1) ... [2020-10-25 22:19:26,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:19:26,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:19:26,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:19:26,752 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:19:26,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:19:26,797 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:19:26,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:26 WrapperNode [2020-10-25 22:19:26,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:19:26,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:19:26,799 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:19:26,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:19:26,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:26" (1/1) ... [2020-10-25 22:19:26,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:26" (1/1) ... [2020-10-25 22:19:26,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:19:26,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:19:26,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:19:26,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:19:26,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:26" (1/1) ... [2020-10-25 22:19:26,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:26" (1/1) ... [2020-10-25 22:19:26,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:26" (1/1) ... [2020-10-25 22:19:26,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:26" (1/1) ... [2020-10-25 22:19:26,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:26" (1/1) ... [2020-10-25 22:19:26,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:26" (1/1) ... [2020-10-25 22:19:26,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:26" (1/1) ... [2020-10-25 22:19:26,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:19:26,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:19:26,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:19:26,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:19:26,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:19:26,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:19:26,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:19:26,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:19:26,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:19:27,534 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:19:27,535 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-25 22:19:27,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:19:27 BoogieIcfgContainer [2020-10-25 22:19:27,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:19:27,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:19:27,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:19:27,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:19:27,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:19:26" (1/3) ... [2020-10-25 22:19:27,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426003ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:19:27, skipping insertion in model container [2020-10-25 22:19:27,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:26" (2/3) ... [2020-10-25 22:19:27,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@426003ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:19:27, skipping insertion in model container [2020-10-25 22:19:27,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:19:27" (3/3) ... [2020-10-25 22:19:27,552 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-2.c [2020-10-25 22:19:27,570 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:19:27,577 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:19:27,592 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:19:27,636 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:19:27,636 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:19:27,636 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:19:27,636 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:19:27,637 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:19:27,637 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:19:27,637 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:19:27,637 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:19:27,659 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-25 22:19:27,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-25 22:19:27,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:19:27,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-25 22:19:27,668 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:19:27,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:19:27,677 INFO L82 PathProgramCache]: Analyzing trace with hash 891600039, now seen corresponding path program 1 times [2020-10-25 22:19:27,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:19:27,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691782765] [2020-10-25 22:19:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:19:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:19:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:27,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691782765] [2020-10-25 22:19:27,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:19:27,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 22:19:27,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566318795] [2020-10-25 22:19:27,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:19:27,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:19:27,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:19:27,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:19:27,910 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-10-25 22:19:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:19:27,932 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2020-10-25 22:19:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:19:27,935 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-25 22:19:27,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:19:27,951 INFO L225 Difference]: With dead ends: 28 [2020-10-25 22:19:27,951 INFO L226 Difference]: Without dead ends: 17 [2020-10-25 22:19:27,959 INFO L677 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 [2020-10-25 22:19:28,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-25 22:19:28,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-25 22:19:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-25 22:19:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2020-10-25 22:19:28,019 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 6 [2020-10-25 22:19:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:19:28,020 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2020-10-25 22:19:28,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:19:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2020-10-25 22:19:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-25 22:19:28,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:19:28,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-25 22:19:28,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:19:28,021 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:19:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:19:28,022 INFO L82 PathProgramCache]: Analyzing trace with hash 889693415, now seen corresponding path program 1 times [2020-10-25 22:19:28,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:19:28,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219453531] [2020-10-25 22:19:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:19:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:19:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:28,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219453531] [2020-10-25 22:19:28,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:19:28,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 22:19:28,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994809201] [2020-10-25 22:19:28,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 22:19:28,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:19:28,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 22:19:28,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:19:28,093 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand 3 states. [2020-10-25 22:19:28,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:19:28,157 INFO L93 Difference]: Finished difference Result 23 states and 34 transitions. [2020-10-25 22:19:28,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:19:28,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-10-25 22:19:28,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:19:28,159 INFO L225 Difference]: With dead ends: 23 [2020-10-25 22:19:28,160 INFO L226 Difference]: Without dead ends: 19 [2020-10-25 22:19:28,160 INFO L677 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 [2020-10-25 22:19:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-25 22:19:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-25 22:19:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-25 22:19:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 28 transitions. [2020-10-25 22:19:28,166 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 28 transitions. Word has length 6 [2020-10-25 22:19:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:19:28,166 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 28 transitions. [2020-10-25 22:19:28,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 22:19:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 28 transitions. [2020-10-25 22:19:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-25 22:19:28,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:19:28,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:19:28,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:19:28,168 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:19:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:19:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1797740634, now seen corresponding path program 1 times [2020-10-25 22:19:28,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:19:28,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27173074] [2020-10-25 22:19:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:19:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:19:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:28,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27173074] [2020-10-25 22:19:28,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:19:28,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 22:19:28,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889547151] [2020-10-25 22:19:28,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 22:19:28,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:19:28,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 22:19:28,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:19:28,233 INFO L87 Difference]: Start difference. First operand 18 states and 28 transitions. Second operand 3 states. [2020-10-25 22:19:28,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:19:28,334 INFO L93 Difference]: Finished difference Result 48 states and 78 transitions. [2020-10-25 22:19:28,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:19:28,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-25 22:19:28,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:19:28,336 INFO L225 Difference]: With dead ends: 48 [2020-10-25 22:19:28,336 INFO L226 Difference]: Without dead ends: 33 [2020-10-25 22:19:28,337 INFO L677 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 [2020-10-25 22:19:28,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-25 22:19:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-25 22:19:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-25 22:19:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-25 22:19:28,344 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 17 [2020-10-25 22:19:28,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:19:28,344 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-25 22:19:28,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 22:19:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-25 22:19:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-25 22:19:28,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:19:28,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:19:28,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 22:19:28,347 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:19:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:19:28,348 INFO L82 PathProgramCache]: Analyzing trace with hash -170777494, now seen corresponding path program 1 times [2020-10-25 22:19:28,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:19:28,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151325897] [2020-10-25 22:19:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:19:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:19:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:28,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151325897] [2020-10-25 22:19:28,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327138532] [2020-10-25 22:19:28,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:19:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:19:28,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-25 22:19:28,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:19:28,877 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:19:28,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-25 22:19:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:28,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:19:28,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 11 [2020-10-25 22:19:28,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624840811] [2020-10-25 22:19:28,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-25 22:19:28,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:19:28,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-25 22:19:28,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-25 22:19:28,915 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 11 states. [2020-10-25 22:19:29,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:19:29,090 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-10-25 22:19:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 22:19:29,090 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-10-25 22:19:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:19:29,091 INFO L225 Difference]: With dead ends: 57 [2020-10-25 22:19:29,091 INFO L226 Difference]: Without dead ends: 30 [2020-10-25 22:19:29,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-25 22:19:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-25 22:19:29,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-25 22:19:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-25 22:19:29,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2020-10-25 22:19:29,098 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 17 [2020-10-25 22:19:29,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:19:29,098 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2020-10-25 22:19:29,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-25 22:19:29,098 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2020-10-25 22:19:29,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-25 22:19:29,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:19:29,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:19:29,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:19:29,311 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:19:29,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:19:29,313 INFO L82 PathProgramCache]: Analyzing trace with hash -784776342, now seen corresponding path program 1 times [2020-10-25 22:19:29,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:19:29,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464434856] [2020-10-25 22:19:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:19:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:19:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:29,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464434856] [2020-10-25 22:19:29,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:19:29,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 22:19:29,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239276084] [2020-10-25 22:19:29,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 22:19:29,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:19:29,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 22:19:29,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:19:29,396 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand 3 states. [2020-10-25 22:19:29,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:19:29,460 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-10-25 22:19:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:19:29,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-25 22:19:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:19:29,461 INFO L225 Difference]: With dead ends: 34 [2020-10-25 22:19:29,461 INFO L226 Difference]: Without dead ends: 19 [2020-10-25 22:19:29,462 INFO L677 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 [2020-10-25 22:19:29,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-25 22:19:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-25 22:19:29,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-25 22:19:29,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-25 22:19:29,466 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 17 [2020-10-25 22:19:29,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:19:29,466 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-25 22:19:29,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 22:19:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-25 22:19:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-25 22:19:29,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:19:29,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:19:29,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-25 22:19:29,468 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:19:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:19:29,469 INFO L82 PathProgramCache]: Analyzing trace with hash -843881686, now seen corresponding path program 1 times [2020-10-25 22:19:29,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:19:29,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846010307] [2020-10-25 22:19:29,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:19:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:19:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:29,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846010307] [2020-10-25 22:19:29,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723123368] [2020-10-25 22:19:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:19:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:19:29,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-25 22:19:29,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:19:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:29,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:19:29,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-25 22:19:29,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545579778] [2020-10-25 22:19:29,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-25 22:19:29,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:19:29,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-25 22:19:29,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-25 22:19:29,775 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 14 states. [2020-10-25 22:19:29,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:19:29,958 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-25 22:19:29,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-25 22:19:29,959 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-25 22:19:29,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:19:29,960 INFO L225 Difference]: With dead ends: 34 [2020-10-25 22:19:29,960 INFO L226 Difference]: Without dead ends: 30 [2020-10-25 22:19:29,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-25 22:19:29,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-25 22:19:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-25 22:19:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-25 22:19:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-25 22:19:29,973 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 17 [2020-10-25 22:19:29,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:19:29,974 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-25 22:19:29,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-25 22:19:29,974 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-25 22:19:29,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-25 22:19:29,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:19:29,977 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-10-25 22:19:30,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:19:30,190 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:19:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:19:30,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2006766329, now seen corresponding path program 2 times [2020-10-25 22:19:30,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:19:30,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729338620] [2020-10-25 22:19:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:19:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:19:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:30,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729338620] [2020-10-25 22:19:30,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423373773] [2020-10-25 22:19:30,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:19:31,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:19:31,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:19:31,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-25 22:19:31,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:19:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:31,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:19:31,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-25 22:19:31,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554474000] [2020-10-25 22:19:31,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-25 22:19:31,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:19:31,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-25 22:19:31,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-25 22:19:31,108 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 24 states. [2020-10-25 22:19:31,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:19:31,612 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-25 22:19:31,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-25 22:19:31,614 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-25 22:19:31,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:19:31,615 INFO L225 Difference]: With dead ends: 45 [2020-10-25 22:19:31,615 INFO L226 Difference]: Without dead ends: 41 [2020-10-25 22:19:31,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-25 22:19:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-25 22:19:31,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-25 22:19:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-25 22:19:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-10-25 22:19:31,623 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 28 [2020-10-25 22:19:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:19:31,623 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-10-25 22:19:31,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-25 22:19:31,624 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-10-25 22:19:31,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-25 22:19:31,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:19:31,625 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-10-25 22:19:31,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:19:31,827 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:19:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:19:31,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1182300406, now seen corresponding path program 3 times [2020-10-25 22:19:31,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:19:31,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028329028] [2020-10-25 22:19:31,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:19:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:19:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:32,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028329028] [2020-10-25 22:19:32,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672666768] [2020-10-25 22:19:32,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:19:32,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-25 22:19:32,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:19:32,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 63 conjunts are in the unsatisfiable core [2020-10-25 22:19:32,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:19:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:33,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:19:33,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-10-25 22:19:33,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705707918] [2020-10-25 22:19:33,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-25 22:19:33,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:19:33,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-25 22:19:33,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-25 22:19:33,100 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 34 states. [2020-10-25 22:19:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:19:34,127 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-25 22:19:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-25 22:19:34,128 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 39 [2020-10-25 22:19:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:19:34,129 INFO L225 Difference]: With dead ends: 56 [2020-10-25 22:19:34,130 INFO L226 Difference]: Without dead ends: 52 [2020-10-25 22:19:34,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-10-25 22:19:34,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-25 22:19:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-25 22:19:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-25 22:19:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-25 22:19:34,142 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 39 [2020-10-25 22:19:34,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:19:34,143 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-25 22:19:34,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-25 22:19:34,143 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-25 22:19:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-25 22:19:34,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:19:34,145 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-10-25 22:19:34,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:19:34,361 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:19:34,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:19:34,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1256465113, now seen corresponding path program 4 times [2020-10-25 22:19:34,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:19:34,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402582085] [2020-10-25 22:19:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:19:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:19:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:36,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402582085] [2020-10-25 22:19:36,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003755747] [2020-10-25 22:19:36,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:19:36,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 22:19:36,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:19:36,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 86 conjunts are in the unsatisfiable core [2020-10-25 22:19:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:19:39,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:19:39,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-25 22:19:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:40,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:19:40,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44] total 84 [2020-10-25 22:19:40,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179213869] [2020-10-25 22:19:40,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-25 22:19:40,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:19:40,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-25 22:19:40,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=6688, Unknown=0, NotChecked=0, Total=6972 [2020-10-25 22:19:40,072 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 84 states. [2020-10-25 22:19:42,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:19:42,025 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-25 22:19:42,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-25 22:19:42,026 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 50 [2020-10-25 22:19:42,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:19:42,027 INFO L225 Difference]: With dead ends: 67 [2020-10-25 22:19:42,027 INFO L226 Difference]: Without dead ends: 63 [2020-10-25 22:19:42,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=284, Invalid=6688, Unknown=0, NotChecked=0, Total=6972 [2020-10-25 22:19:42,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-25 22:19:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-25 22:19:42,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-25 22:19:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-10-25 22:19:42,050 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 50 [2020-10-25 22:19:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:19:42,051 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-10-25 22:19:42,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-25 22:19:42,053 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-10-25 22:19:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-25 22:19:42,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:19:42,057 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-10-25 22:19:42,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:19:42,271 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:19:42,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:19:42,272 INFO L82 PathProgramCache]: Analyzing trace with hash 28672746, now seen corresponding path program 5 times [2020-10-25 22:19:42,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:19:42,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39628941] [2020-10-25 22:19:42,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:19:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:19:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-25 22:19:43,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39628941] [2020-10-25 22:19:43,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279020527] [2020-10-25 22:19:43,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:19:43,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-25 22:19:43,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:19:43,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 106 conjunts are in the unsatisfiable core [2020-10-25 22:19:43,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:19:46,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:19:46,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-25 22:19:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:19:46,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:19:46,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 54] total 57 [2020-10-25 22:19:46,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138695524] [2020-10-25 22:19:46,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-25 22:19:46,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:19:46,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-25 22:19:46,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3003, Unknown=0, NotChecked=0, Total=3192 [2020-10-25 22:19:46,280 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 57 states. [2020-10-25 22:19:49,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:19:49,881 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2020-10-25 22:19:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-25 22:19:49,882 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 61 [2020-10-25 22:19:49,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:19:49,883 INFO L225 Difference]: With dead ends: 75 [2020-10-25 22:19:49,883 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 22:19:49,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 11 SyntacticMatches, 48 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=256, Invalid=4574, Unknown=0, NotChecked=0, Total=4830 [2020-10-25 22:19:49,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 22:19:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 22:19:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 22:19:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 22:19:49,886 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2020-10-25 22:19:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:19:49,886 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 22:19:49,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-25 22:19:49,886 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 22:19:49,886 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 22:19:50,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:19:50,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 22:19:50,213 INFO L274 CegarLoopResult]: For program point L27-1(lines 17 47) no Hoare annotation was computed. [2020-10-25 22:19:50,213 INFO L274 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-25 22:19:50,213 INFO L277 CegarLoopResult]: At program point L7-2(lines 1 50) the Hoare annotation is: true [2020-10-25 22:19:50,213 INFO L274 CegarLoopResult]: For program point L36-1(lines 17 47) no Hoare annotation was computed. [2020-10-25 22:19:50,213 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-25 22:19:50,213 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 22:19:50,213 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 22:19:50,213 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 22:19:50,214 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-25 22:19:50,214 INFO L274 CegarLoopResult]: For program point L24-1(lines 17 47) no Hoare annotation was computed. [2020-10-25 22:19:50,214 INFO L270 CegarLoopResult]: At program point L45-1(lines 17 47) the Hoare annotation is: (let ((.cse0 (<= (mod ULTIMATE.start_main_~y~0 2) 0))) (or (and (= ULTIMATE.start_main_~x~0 80) .cse0) (and (not (= ULTIMATE.start_main_~y~0 (* (div ULTIMATE.start_main_~y~0 2) 2))) (= (+ ULTIMATE.start_main_~x~0 5) 0)) (= ULTIMATE.start_main_~x~0 0) (and (= 40 ULTIMATE.start_main_~x~0) .cse0) (and (= ULTIMATE.start_main_~x~0 100) .cse0) (and (= ULTIMATE.start_main_~x~0 20) .cse0) (and .cse0 (= ULTIMATE.start_main_~x~0 60)))) [2020-10-25 22:19:50,214 INFO L274 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-25 22:19:50,215 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 22:19:50,215 INFO L274 CegarLoopResult]: For program point L33-1(lines 17 47) no Hoare annotation was computed. [2020-10-25 22:19:50,215 INFO L274 CegarLoopResult]: For program point L21-1(lines 17 47) no Hoare annotation was computed. [2020-10-25 22:19:50,215 INFO L274 CegarLoopResult]: For program point L17-2(lines 17 47) no Hoare annotation was computed. [2020-10-25 22:19:50,215 INFO L274 CegarLoopResult]: For program point L42-1(lines 17 47) no Hoare annotation was computed. [2020-10-25 22:19:50,215 INFO L274 CegarLoopResult]: For program point L30-1(lines 17 47) no Hoare annotation was computed. [2020-10-25 22:19:50,215 INFO L274 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2020-10-25 22:19:50,215 INFO L274 CegarLoopResult]: For program point L18-2(lines 17 47) no Hoare annotation was computed. [2020-10-25 22:19:50,215 INFO L274 CegarLoopResult]: For program point L39-1(lines 17 47) no Hoare annotation was computed. [2020-10-25 22:19:50,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:19:50 BoogieIcfgContainer [2020-10-25 22:19:50,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:19:50,230 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:19:50,230 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:19:50,231 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:19:50,231 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:19:27" (3/4) ... [2020-10-25 22:19:50,234 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 22:19:50,243 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-25 22:19:50,243 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-25 22:19:50,243 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 22:19:50,243 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 22:19:50,294 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:19:50,294 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:19:50,296 INFO L168 Benchmark]: Toolchain (without parser) took 23816.97 ms. Allocated memory was 41.9 MB in the beginning and 157.3 MB in the end (delta: 115.3 MB). Free memory was 23.7 MB in the beginning and 113.5 MB in the end (delta: -89.8 MB). Peak memory consumption was 26.6 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:50,297 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 41.9 MB. Free memory was 20.0 MB in the beginning and 20.0 MB in the end (delta: 52.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:19:50,298 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.69 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 23.1 MB in the beginning and 27.4 MB in the end (delta: -4.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:50,298 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.11 ms. Allocated memory is still 50.3 MB. Free memory was 27.4 MB in the beginning and 25.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:50,299 INFO L168 Benchmark]: Boogie Preprocessor took 28.11 ms. Allocated memory is still 50.3 MB. Free memory was 25.7 MB in the beginning and 24.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:50,300 INFO L168 Benchmark]: RCFGBuilder took 665.90 ms. Allocated memory is still 50.3 MB. Free memory was 24.5 MB in the beginning and 33.8 MB in the end (delta: -9.3 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:50,301 INFO L168 Benchmark]: TraceAbstraction took 22688.35 ms. Allocated memory was 50.3 MB in the beginning and 157.3 MB in the end (delta: 107.0 MB). Free memory was 33.3 MB in the beginning and 115.6 MB in the end (delta: -82.2 MB). Peak memory consumption was 24.6 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:50,301 INFO L168 Benchmark]: Witness Printer took 63.88 ms. Allocated memory is still 157.3 MB. Free memory was 115.6 MB in the beginning and 113.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:50,306 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 41.9 MB. Free memory was 20.0 MB in the beginning and 20.0 MB in the end (delta: 52.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 312.69 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 23.1 MB in the beginning and 27.4 MB in the end (delta: -4.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.11 ms. Allocated memory is still 50.3 MB. Free memory was 27.4 MB in the beginning and 25.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.11 ms. Allocated memory is still 50.3 MB. Free memory was 25.7 MB in the beginning and 24.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 665.90 ms. Allocated memory is still 50.3 MB. Free memory was 24.5 MB in the beginning and 33.8 MB in the end (delta: -9.3 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22688.35 ms. Allocated memory was 50.3 MB in the beginning and 157.3 MB in the end (delta: 107.0 MB). Free memory was 33.3 MB in the beginning and 115.6 MB in the end (delta: -82.2 MB). Peak memory consumption was 24.6 MB. Max. memory is 16.1 GB. * Witness Printer took 63.88 ms. Allocated memory is still 157.3 MB. Free memory was 115.6 MB in the beginning and 113.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((((x == 80 && y % 2 <= 0) || (!(y == y / 2 * 2) && x + 5 == 0)) || x == 0) || (40 == x && y % 2 <= 0)) || (x == 100 && y % 2 <= 0)) || (x == 20 && y % 2 <= 0)) || (y % 2 <= 0 && x == 60) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.4s, OverallIterations: 10, TraceHistogramMax: 5, AutomataDifference: 7.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 119 SDtfs, 47 SDslu, 320 SDs, 0 SdLazy, 7502 SolverSat, 174 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 411 GetRequests, 124 SyntacticMatches, 58 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 11.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=9, 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, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 10 NumberOfFragments, 64 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 75 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 12.1s InterpolantComputationTime, 470 NumberOfCodeBlocks, 464 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 454 ConstructedInterpolants, 0 QuantifiedInterpolants, 182612 SizeOfPredicates, 15 NumberOfNonLiveVariables, 870 ConjunctsInSsa, 347 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 104/474 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...