./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/gsv2008.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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-lit/gsv2008.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad7102f2457c0f5542a3d448f84e7fa5158fff18 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 01:01:03,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:01:03,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:01:03,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:01:03,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:01:03,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:01:03,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:01:03,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:01:03,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:01:03,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:01:03,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:01:03,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:01:03,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:01:03,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:01:03,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:01:03,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:01:03,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:01:03,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:01:03,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:01:03,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:01:03,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:01:03,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:01:03,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:01:03,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:01:03,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:01:03,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:01:03,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:01:03,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:01:03,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:01:03,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:01:03,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:01:03,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:01:03,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:01:03,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:01:03,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:01:03,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:01:03,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:01:03,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:01:03,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:01:03,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:01:03,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:01:03,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:01:03,717 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:01:03,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:01:03,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:01:03,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:01:03,719 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:01:03,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:01:03,719 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:01:03,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:01:03,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:01:03,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:01:03,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:01:03,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:01:03,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:01:03,721 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:01:03,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:01:03,721 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:01:03,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:01:03,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:01:03,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:01:03,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:01:03,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:01:03,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:01:03,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:01:03,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:01:03,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:01:03,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:01:03,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:01:03,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:01:03,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:01:03,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> ad7102f2457c0f5542a3d448f84e7fa5158fff18 [2020-10-20 01:01:03,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:01:03,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:01:03,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:01:03,953 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:01:03,955 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:01:03,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gsv2008.i [2020-10-20 01:01:04,023 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff99eb314/6ba7e6cf1b5b4b4d8add0d18140583ae/FLAGeaf9c3708 [2020-10-20 01:01:04,582 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:01:04,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gsv2008.i [2020-10-20 01:01:04,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff99eb314/6ba7e6cf1b5b4b4d8add0d18140583ae/FLAGeaf9c3708 [2020-10-20 01:01:05,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff99eb314/6ba7e6cf1b5b4b4d8add0d18140583ae [2020-10-20 01:01:05,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:01:05,028 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:01:05,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:01:05,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:01:05,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:01:05,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:01:05" (1/1) ... [2020-10-20 01:01:05,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e8bc88f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:01:05, skipping insertion in model container [2020-10-20 01:01:05,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:01:05" (1/1) ... [2020-10-20 01:01:05,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:01:05,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:01:05,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:01:05,303 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:01:05,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:01:05,340 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:01:05,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:01:05 WrapperNode [2020-10-20 01:01:05,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:01:05,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:01:05,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:01:05,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:01:05,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:01:05" (1/1) ... [2020-10-20 01:01:05,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:01:05" (1/1) ... [2020-10-20 01:01:05,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:01:05,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:01:05,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:01:05,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:01:05,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:01:05" (1/1) ... [2020-10-20 01:01:05,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:01:05" (1/1) ... [2020-10-20 01:01:05,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:01:05" (1/1) ... [2020-10-20 01:01:05,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:01:05" (1/1) ... [2020-10-20 01:01:05,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:01:05" (1/1) ... [2020-10-20 01:01:05,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:01:05" (1/1) ... [2020-10-20 01:01:05,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:01:05" (1/1) ... [2020-10-20 01:01:05,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:01:05,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:01:05,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:01:05,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:01:05,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:01:05" (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 [2020-10-20 01:01:05,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:01:05,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:01:05,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:01:05,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:01:05,675 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:01:05,676 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-20 01:01:05,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:01:05 BoogieIcfgContainer [2020-10-20 01:01:05,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:01:05,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:01:05,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:01:05,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:01:05,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:01:05" (1/3) ... [2020-10-20 01:01:05,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31547f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:01:05, skipping insertion in model container [2020-10-20 01:01:05,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:01:05" (2/3) ... [2020-10-20 01:01:05,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31547f72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:01:05, skipping insertion in model container [2020-10-20 01:01:05,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:01:05" (3/3) ... [2020-10-20 01:01:05,687 INFO L111 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2020-10-20 01:01:05,700 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:01:05,707 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:01:05,723 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:01:05,760 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:01:05,761 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:01:05,761 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:01:05,761 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:01:05,762 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:01:05,762 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:01:05,762 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:01:05,763 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:01:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-10-20 01:01:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 01:01:05,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:01:05,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:01:05,795 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:01:05,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:01:05,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1446203657, now seen corresponding path program 1 times [2020-10-20 01:01:05,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:01:05,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498067067] [2020-10-20 01:01:05,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:01:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:01:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:01:05,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498067067] [2020-10-20 01:01:05,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:01:05,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 01:01:05,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862230702] [2020-10-20 01:01:05,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 01:01:05,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:01:05,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 01:01:05,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 01:01:05,985 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-10-20 01:01:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:01:05,999 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-10-20 01:01:06,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 01:01:06,001 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-10-20 01:01:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:01:06,012 INFO L225 Difference]: With dead ends: 25 [2020-10-20 01:01:06,012 INFO L226 Difference]: Without dead ends: 10 [2020-10-20 01:01:06,016 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 [2020-10-20 01:01:06,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-10-20 01:01:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-10-20 01:01:06,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 01:01:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-10-20 01:01:06,050 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-10-20 01:01:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:01:06,050 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-10-20 01:01:06,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 01:01:06,051 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-10-20 01:01:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 01:01:06,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:01:06,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:01:06,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:01:06,052 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:01:06,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:01:06,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1331687053, now seen corresponding path program 1 times [2020-10-20 01:01:06,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:01:06,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737796825] [2020-10-20 01:01:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:01:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:01:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:01:06,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737796825] [2020-10-20 01:01:06,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:01:06,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 01:01:06,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444520088] [2020-10-20 01:01:06,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 01:01:06,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:01:06,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 01:01:06,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 01:01:06,125 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 3 states. [2020-10-20 01:01:06,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:01:06,138 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-10-20 01:01:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 01:01:06,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-20 01:01:06,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:01:06,140 INFO L225 Difference]: With dead ends: 17 [2020-10-20 01:01:06,140 INFO L226 Difference]: Without dead ends: 11 [2020-10-20 01:01:06,142 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 [2020-10-20 01:01:06,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-10-20 01:01:06,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-20 01:01:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-20 01:01:06,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-10-20 01:01:06,146 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-10-20 01:01:06,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:01:06,146 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-10-20 01:01:06,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 01:01:06,146 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-10-20 01:01:06,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 01:01:06,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:01:06,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:01:06,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 01:01:06,147 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:01:06,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:01:06,148 INFO L82 PathProgramCache]: Analyzing trace with hash -66976811, now seen corresponding path program 1 times [2020-10-20 01:01:06,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:01:06,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278009098] [2020-10-20 01:01:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:01:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:01:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:01:06,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278009098] [2020-10-20 01:01:06,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236810917] [2020-10-20 01:01:06,241 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 [2020-10-20 01:01:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:01:06,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 01:01:06,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:01:06,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:01:06,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:01:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:01:06,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:01:06,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 01:01:06,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485930315] [2020-10-20 01:01:06,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:01:06,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:01:06,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:01:06,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:01:06,413 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2020-10-20 01:01:06,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:01:06,471 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-20 01:01:06,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:01:06,472 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-20 01:01:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:01:06,473 INFO L225 Difference]: With dead ends: 18 [2020-10-20 01:01:06,473 INFO L226 Difference]: Without dead ends: 12 [2020-10-20 01:01:06,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:01:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-20 01:01:06,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-20 01:01:06,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 01:01:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-20 01:01:06,478 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-20 01:01:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:01:06,478 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-20 01:01:06,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:01:06,478 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-20 01:01:06,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 01:01:06,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:01:06,479 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:01:06,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 01:01:06,685 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:01:06,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:01:06,686 INFO L82 PathProgramCache]: Analyzing trace with hash -475883635, now seen corresponding path program 2 times [2020-10-20 01:01:06,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:01:06,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336820132] [2020-10-20 01:01:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:01:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:01:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:01:06,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336820132] [2020-10-20 01:01:06,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365839177] [2020-10-20 01:01:06,800 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 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 [2020-10-20 01:01:06,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:01:06,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:01:06,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 01:01:06,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:01:06,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:01:06,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:01:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:01:06,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:01:06,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 01:01:06,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024356873] [2020-10-20 01:01:06,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 01:01:06,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:01:06,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 01:01:06,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:01:06,920 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2020-10-20 01:01:06,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:01:06,986 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-20 01:01:06,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:01:06,987 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-20 01:01:06,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:01:06,988 INFO L225 Difference]: With dead ends: 19 [2020-10-20 01:01:06,988 INFO L226 Difference]: Without dead ends: 13 [2020-10-20 01:01:06,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:01:06,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-20 01:01:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-20 01:01:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-20 01:01:06,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-20 01:01:06,992 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-20 01:01:06,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:01:06,992 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-20 01:01:06,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 01:01:06,992 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-20 01:01:06,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 01:01:06,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:01:06,993 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:01:07,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:01:07,205 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:01:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:01:07,205 INFO L82 PathProgramCache]: Analyzing trace with hash -267093291, now seen corresponding path program 3 times [2020-10-20 01:01:07,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:01:07,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227893441] [2020-10-20 01:01:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:01:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:01:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-20 01:01:07,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227893441] [2020-10-20 01:01:07,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:01:07,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 01:01:07,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521274482] [2020-10-20 01:01:07,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:01:07,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:01:07,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:01:07,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:01:07,267 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-10-20 01:01:07,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:01:07,297 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-10-20 01:01:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:01:07,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-20 01:01:07,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:01:07,298 INFO L225 Difference]: With dead ends: 13 [2020-10-20 01:01:07,298 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 01:01:07,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:01:07,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 01:01:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 01:01:07,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 01:01:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 01:01:07,299 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-10-20 01:01:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:01:07,300 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 01:01:07,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:01:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 01:01:07,300 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 01:01:07,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 01:01:07,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 01:01:07,326 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 01:01:07,327 INFO L270 CegarLoopResult]: At program point L29-2(lines 29 32) the Hoare annotation is: (or (<= (+ ULTIMATE.start_main_~x~0 2) ULTIMATE.start_main_~y~0) (<= (+ ULTIMATE.start_main_~x~0 50) 0)) [2020-10-20 01:01:07,327 INFO L274 CegarLoopResult]: For program point L29-3(lines 29 32) no Hoare annotation was computed. [2020-10-20 01:01:07,327 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-10-20 01:01:07,327 INFO L277 CegarLoopResult]: At program point L34(lines 24 35) the Hoare annotation is: true [2020-10-20 01:01:07,328 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 01:01:07,328 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 01:01:07,328 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 01:01:07,328 INFO L274 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-10-20 01:01:07,328 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-20 01:01:07,328 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-20 01:01:07,328 INFO L277 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2020-10-20 01:01:07,328 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-10-20 01:01:07,329 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-20 01:01:07,329 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-10-20 01:01:07,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:01:07 BoogieIcfgContainer [2020-10-20 01:01:07,347 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:01:07,347 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:01:07,347 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:01:07,348 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:01:07,348 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:01:05" (3/4) ... [2020-10-20 01:01:07,352 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 01:01:07,363 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-20 01:01:07,363 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 01:01:07,364 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:01:07,364 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:01:07,415 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:01:07,415 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:01:07,418 INFO L168 Benchmark]: Toolchain (without parser) took 2396.51 ms. Allocated memory was 39.8 MB in the beginning and 45.6 MB in the end (delta: 5.8 MB). Free memory was 17.8 MB in the beginning and 28.8 MB in the end (delta: -11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 14.3 GB. [2020-10-20 01:01:07,419 INFO L168 Benchmark]: CDTParser took 0.81 ms. Allocated memory is still 30.9 MB. Free memory was 7.2 MB in the beginning and 7.1 MB in the end (delta: 43.6 kB). Peak memory consumption was 43.6 kB. Max. memory is 14.3 GB. [2020-10-20 01:01:07,420 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.25 ms. Allocated memory was 39.8 MB in the beginning and 40.9 MB in the end (delta: 1.0 MB). Free memory was 16.9 MB in the beginning and 17.3 MB in the end (delta: -383.4 kB). Peak memory consumption was 7.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:01:07,420 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.83 ms. Allocated memory is still 40.9 MB. Free memory was 17.3 MB in the beginning and 15.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:01:07,421 INFO L168 Benchmark]: Boogie Preprocessor took 22.97 ms. Allocated memory is still 40.9 MB. Free memory was 15.5 MB in the beginning and 14.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:01:07,422 INFO L168 Benchmark]: RCFGBuilder took 276.96 ms. Allocated memory was 40.9 MB in the beginning and 41.9 MB in the end (delta: 1.0 MB). Free memory was 14.3 MB in the beginning and 17.9 MB in the end (delta: -3.6 MB). Peak memory consumption was 4.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:01:07,423 INFO L168 Benchmark]: TraceAbstraction took 1667.32 ms. Allocated memory was 41.9 MB in the beginning and 45.1 MB in the end (delta: 3.1 MB). Free memory was 17.2 MB in the beginning and 14.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 6.4 MB. Max. memory is 14.3 GB. [2020-10-20 01:01:07,423 INFO L168 Benchmark]: Witness Printer took 68.28 ms. Allocated memory was 45.1 MB in the beginning and 45.6 MB in the end (delta: 524.3 kB). Free memory was 14.0 MB in the beginning and 28.8 MB in the end (delta: -14.7 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 01:01:07,427 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.81 ms. Allocated memory is still 30.9 MB. Free memory was 7.2 MB in the beginning and 7.1 MB in the end (delta: 43.6 kB). Peak memory consumption was 43.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 311.25 ms. Allocated memory was 39.8 MB in the beginning and 40.9 MB in the end (delta: 1.0 MB). Free memory was 16.9 MB in the beginning and 17.3 MB in the end (delta: -383.4 kB). Peak memory consumption was 7.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 35.83 ms. Allocated memory is still 40.9 MB. Free memory was 17.3 MB in the beginning and 15.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 22.97 ms. Allocated memory is still 40.9 MB. Free memory was 15.5 MB in the beginning and 14.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 276.96 ms. Allocated memory was 40.9 MB in the beginning and 41.9 MB in the end (delta: 1.0 MB). Free memory was 14.3 MB in the beginning and 17.9 MB in the end (delta: -3.6 MB). Peak memory consumption was 4.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1667.32 ms. Allocated memory was 41.9 MB in the beginning and 45.1 MB in the end (delta: 3.1 MB). Free memory was 17.2 MB in the beginning and 14.0 MB in the end (delta: 3.2 MB). Peak memory consumption was 6.4 MB. Max. memory is 14.3 GB. * Witness Printer took 68.28 ms. Allocated memory was 45.1 MB in the beginning and 45.6 MB in the end (delta: 524.3 kB). Free memory was 14.0 MB in the beginning and 28.8 MB in the end (delta: -14.7 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: x + 2 <= y || x + 50 <= 0 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 9 SDslu, 61 SDs, 0 SdLazy, 71 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 8 NumberOfFragments, 13 HoareAnnotationTreeSize, 3 FomulaSimplifications, 24 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 65 ConstructedInterpolants, 0 QuantifiedInterpolants, 1521 SizeOfPredicates, 8 NumberOfNonLiveVariables, 101 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 6/14 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...