./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/nested_2.c --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-simple/nested_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 93ddc895418216afe230ea40e87acd63de5c2d0d ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 01:09:24,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:09:24,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:09:24,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:09:24,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:09:24,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:09:24,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:09:24,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:09:24,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:09:24,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:09:24,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:09:24,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:09:24,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:09:24,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:09:24,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:09:24,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:09:24,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:09:24,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:09:24,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:09:24,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:09:24,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:09:24,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:09:24,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:09:24,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:09:25,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:09:25,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:09:25,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:09:25,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:09:25,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:09:25,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:09:25,004 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:09:25,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:09:25,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:09:25,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:09:25,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:09:25,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:09:25,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:09:25,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:09:25,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:09:25,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:09:25,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:09:25,011 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:09:25,035 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:09:25,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:09:25,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:09:25,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:09:25,037 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:09:25,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:09:25,038 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:09:25,038 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:09:25,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:09:25,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:09:25,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:09:25,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:09:25,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:09:25,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:09:25,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:09:25,040 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:09:25,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:09:25,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:09:25,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:09:25,041 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:09:25,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:09:25,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:09:25,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:09:25,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:09:25,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:09:25,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:09:25,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:09:25,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:09:25,043 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:09:25,043 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 -> 93ddc895418216afe230ea40e87acd63de5c2d0d [2020-10-20 01:09:25,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:09:25,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:09:25,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:09:25,296 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:09:25,297 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:09:25,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_2.c [2020-10-20 01:09:25,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d509da3d3/1331996443894633ad164c05023ed9ec/FLAG58514028c [2020-10-20 01:09:25,771 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:09:25,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_2.c [2020-10-20 01:09:25,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d509da3d3/1331996443894633ad164c05023ed9ec/FLAG58514028c [2020-10-20 01:09:26,138 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d509da3d3/1331996443894633ad164c05023ed9ec [2020-10-20 01:09:26,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:09:26,149 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:09:26,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:09:26,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:09:26,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:09:26,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@99bd5a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26, skipping insertion in model container [2020-10-20 01:09:26,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:09:26,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:09:26,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:09:26,490 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:09:26,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:09:26,530 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:09:26,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26 WrapperNode [2020-10-20 01:09:26,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:09:26,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:09:26,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:09:26,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:09:26,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:09:26,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:09:26,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:09:26,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:09:26,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (1/1) ... [2020-10-20 01:09:26,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:09:26,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:09:26,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:09:26,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:09:26,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (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 [2020-10-20 01:09:26,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:09:26,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:09:26,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:09:26,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:09:26,883 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:09:26,883 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-20 01:09:26,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:09:26 BoogieIcfgContainer [2020-10-20 01:09:26,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:09:26,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:09:26,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:09:26,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:09:26,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:09:26" (1/3) ... [2020-10-20 01:09:26,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40638fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:09:26, skipping insertion in model container [2020-10-20 01:09:26,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:09:26" (2/3) ... [2020-10-20 01:09:26,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40638fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:09:26, skipping insertion in model container [2020-10-20 01:09:26,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:09:26" (3/3) ... [2020-10-20 01:09:26,895 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_2.c [2020-10-20 01:09:26,908 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:09:26,915 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:09:26,931 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:09:26,963 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:09:26,963 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:09:26,964 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:09:26,964 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:09:26,964 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:09:26,964 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:09:26,964 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:09:26,965 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:09:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-10-20 01:09:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-10-20 01:09:27,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:27,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-10-20 01:09:27,004 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:27,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:27,011 INFO L82 PathProgramCache]: Analyzing trace with hash 28697382, now seen corresponding path program 1 times [2020-10-20 01:09:27,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:27,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878737907] [2020-10-20 01:09:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:27,231 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 01:09:27,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878737907] [2020-10-20 01:09:27,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:27,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 01:09:27,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301327861] [2020-10-20 01:09:27,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 01:09:27,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:27,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 01:09:27,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 01:09:27,259 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2020-10-20 01:09:27,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:27,300 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2020-10-20 01:09:27,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 01:09:27,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-10-20 01:09:27,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:27,313 INFO L225 Difference]: With dead ends: 28 [2020-10-20 01:09:27,314 INFO L226 Difference]: Without dead ends: 13 [2020-10-20 01:09:27,317 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 01:09:27,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-20 01:09:27,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 10. [2020-10-20 01:09:27,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 01:09:27,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-10-20 01:09:27,347 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 5 [2020-10-20 01:09:27,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:27,348 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-10-20 01:09:27,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 01:09:27,348 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-10-20 01:09:27,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 01:09:27,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:27,349 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:27,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:09:27,350 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:27,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:27,351 INFO L82 PathProgramCache]: Analyzing trace with hash 269344378, now seen corresponding path program 1 times [2020-10-20 01:09:27,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:27,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845959041] [2020-10-20 01:09:27,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:27,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845959041] [2020-10-20 01:09:27,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:09:27,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 01:09:27,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697953054] [2020-10-20 01:09:27,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 01:09:27,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:27,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 01:09:27,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 01:09:27,398 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-10-20 01:09:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:27,424 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-10-20 01:09:27,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 01:09:27,425 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-20 01:09:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:27,425 INFO L225 Difference]: With dead ends: 19 [2020-10-20 01:09:27,426 INFO L226 Difference]: Without dead ends: 12 [2020-10-20 01:09:27,427 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 01:09:27,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-20 01:09:27,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-10-20 01:09:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-20 01:09:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-10-20 01:09:27,430 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2020-10-20 01:09:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:27,430 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-20 01:09:27,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 01:09:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-10-20 01:09:27,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 01:09:27,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:27,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:27,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 01:09:27,432 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:27,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:27,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1485378760, now seen corresponding path program 1 times [2020-10-20 01:09:27,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:27,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840119022] [2020-10-20 01:09:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:27,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840119022] [2020-10-20 01:09:27,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376712818] [2020-10-20 01:09:27,480 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 01:09:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:27,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 01:09:27,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:27,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:27,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-20 01:09:27,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104283193] [2020-10-20 01:09:27,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:09:27,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:27,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:09:27,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:09:27,590 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2020-10-20 01:09:27,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:27,624 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-10-20 01:09:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 01:09:27,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-20 01:09:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:27,625 INFO L225 Difference]: With dead ends: 22 [2020-10-20 01:09:27,625 INFO L226 Difference]: Without dead ends: 14 [2020-10-20 01:09:27,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:09:27,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-20 01:09:27,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-10-20 01:09:27,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-20 01:09:27,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-20 01:09:27,630 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-20 01:09:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:27,630 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-20 01:09:27,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:09:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-20 01:09:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 01:09:27,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:27,631 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:09:27,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 01:09:27,844 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:27,845 INFO L82 PathProgramCache]: Analyzing trace with hash 147832950, now seen corresponding path program 2 times [2020-10-20 01:09:27,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:27,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739193963] [2020-10-20 01:09:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 01:09:27,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739193963] [2020-10-20 01:09:27,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819333462] [2020-10-20 01:09:27,918 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 01:09:27,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:09:27,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:27,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 01:09:27,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:09:28,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:28,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-10-20 01:09:28,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593572589] [2020-10-20 01:09:28,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:09:28,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:28,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:09:28,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:28,020 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2020-10-20 01:09:28,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:28,139 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-10-20 01:09:28,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 01:09:28,140 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-20 01:09:28,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:28,141 INFO L225 Difference]: With dead ends: 45 [2020-10-20 01:09:28,142 INFO L226 Difference]: Without dead ends: 35 [2020-10-20 01:09:28,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:09:28,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-20 01:09:28,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2020-10-20 01:09:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 01:09:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-20 01:09:28,150 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12 [2020-10-20 01:09:28,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:28,150 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-20 01:09:28,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:09:28,151 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-20 01:09:28,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 01:09:28,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:28,152 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:28,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:28,368 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:28,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:28,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1657769242, now seen corresponding path program 3 times [2020-10-20 01:09:28,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:28,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583929795] [2020-10-20 01:09:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-20 01:09:28,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583929795] [2020-10-20 01:09:28,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342157822] [2020-10-20 01:09:28,480 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 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 [2020-10-20 01:09:28,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-20 01:09:28,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:28,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 01:09:28,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-20 01:09:28,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:28,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 01:09:28,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333908254] [2020-10-20 01:09:28,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:09:28,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:28,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:09:28,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:28,563 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-10-20 01:09:28,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:28,603 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-10-20 01:09:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:09:28,604 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-20 01:09:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:28,604 INFO L225 Difference]: With dead ends: 44 [2020-10-20 01:09:28,605 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 01:09:28,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:28,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 01:09:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-20 01:09:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 01:09:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-20 01:09:28,620 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2020-10-20 01:09:28,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:28,621 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-20 01:09:28,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:09:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-20 01:09:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 01:09:28,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:28,624 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:28,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:28,838 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:28,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:28,839 INFO L82 PathProgramCache]: Analyzing trace with hash 953965478, now seen corresponding path program 4 times [2020-10-20 01:09:28,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:28,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180605353] [2020-10-20 01:09:28,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-20 01:09:28,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180605353] [2020-10-20 01:09:28,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633880273] [2020-10-20 01:09:28,899 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 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 [2020-10-20 01:09:28,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 01:09:28,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:28,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:09:28,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-20 01:09:28,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:28,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 01:09:28,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927366982] [2020-10-20 01:09:28,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 01:09:28,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:28,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 01:09:28,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:28,979 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-20 01:09:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:29,039 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-20 01:09:29,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:09:29,039 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-20 01:09:29,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:29,040 INFO L225 Difference]: With dead ends: 50 [2020-10-20 01:09:29,040 INFO L226 Difference]: Without dead ends: 34 [2020-10-20 01:09:29,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-20 01:09:29,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-20 01:09:29,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 01:09:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-20 01:09:29,047 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2020-10-20 01:09:29,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:29,047 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-20 01:09:29,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 01:09:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-20 01:09:29,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-20 01:09:29,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:29,049 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:29,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:29,262 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:29,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:29,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1188152166, now seen corresponding path program 5 times [2020-10-20 01:09:29,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:29,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114782105] [2020-10-20 01:09:29,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-20 01:09:29,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114782105] [2020-10-20 01:09:29,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586888565] [2020-10-20 01:09:29,326 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 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 [2020-10-20 01:09:29,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-20 01:09:29,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:29,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 01:09:29,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-20 01:09:29,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:29,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 01:09:29,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728266681] [2020-10-20 01:09:29,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:09:29,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:29,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:09:29,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:09:29,404 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2020-10-20 01:09:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:29,450 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-10-20 01:09:29,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:09:29,450 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-20 01:09:29,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:29,451 INFO L225 Difference]: With dead ends: 54 [2020-10-20 01:09:29,451 INFO L226 Difference]: Without dead ends: 36 [2020-10-20 01:09:29,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:09:29,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-20 01:09:29,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-20 01:09:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-20 01:09:29,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-20 01:09:29,458 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2020-10-20 01:09:29,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:29,458 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-20 01:09:29,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:09:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-20 01:09:29,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-20 01:09:29,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:29,460 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 01:09:29,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-20 01:09:29,673 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:29,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:29,674 INFO L82 PathProgramCache]: Analyzing trace with hash 750610982, now seen corresponding path program 6 times [2020-10-20 01:09:29,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:29,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791877651] [2020-10-20 01:09:29,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-20 01:09:29,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791877651] [2020-10-20 01:09:29,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180669452] [2020-10-20 01:09:29,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-20 01:09:29,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-20 01:09:29,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:29,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 01:09:29,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-20 01:09:29,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:29,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 01:09:29,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182101865] [2020-10-20 01:09:29,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 01:09:29,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:29,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 01:09:29,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:09:29,811 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 6 states. [2020-10-20 01:09:29,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:29,834 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-10-20 01:09:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:09:29,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-20 01:09:29,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:29,836 INFO L225 Difference]: With dead ends: 68 [2020-10-20 01:09:29,836 INFO L226 Difference]: Without dead ends: 65 [2020-10-20 01:09:29,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:09:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-20 01:09:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2020-10-20 01:09:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-20 01:09:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-20 01:09:29,845 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 35 [2020-10-20 01:09:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:29,846 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-20 01:09:29,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 01:09:29,846 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-20 01:09:29,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-20 01:09:29,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:29,848 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2020-10-20 01:09:30,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:30,064 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:30,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1549796206, now seen corresponding path program 7 times [2020-10-20 01:09:30,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:30,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88052219] [2020-10-20 01:09:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-20 01:09:30,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88052219] [2020-10-20 01:09:30,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295208935] [2020-10-20 01:09:30,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:30,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 01:09:30,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-20 01:09:30,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:30,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 01:09:30,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494102561] [2020-10-20 01:09:30,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:09:30,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:30,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:09:30,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:30,269 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 7 states. [2020-10-20 01:09:30,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:30,302 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2020-10-20 01:09:30,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:09:30,303 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-10-20 01:09:30,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:30,304 INFO L225 Difference]: With dead ends: 83 [2020-10-20 01:09:30,304 INFO L226 Difference]: Without dead ends: 80 [2020-10-20 01:09:30,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:09:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-20 01:09:30,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-20 01:09:30,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-20 01:09:30,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-20 01:09:30,314 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 50 [2020-10-20 01:09:30,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:30,315 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-20 01:09:30,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:09:30,315 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-20 01:09:30,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-20 01:09:30,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:30,317 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2020-10-20 01:09:30,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:30,531 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:30,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:30,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1394520358, now seen corresponding path program 8 times [2020-10-20 01:09:30,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:30,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917668251] [2020-10-20 01:09:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 526 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-20 01:09:30,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917668251] [2020-10-20 01:09:30,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328095517] [2020-10-20 01:09:30,678 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:30,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:09:30,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:30,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:09:30,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 526 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-20 01:09:30,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:09:30,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 01:09:30,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901189344] [2020-10-20 01:09:30,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 01:09:30,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:30,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 01:09:30,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:30,842 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 8 states. [2020-10-20 01:09:30,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:30,888 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-10-20 01:09:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:09:30,891 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-20 01:09:30,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:30,892 INFO L225 Difference]: With dead ends: 98 [2020-10-20 01:09:30,893 INFO L226 Difference]: Without dead ends: 95 [2020-10-20 01:09:30,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-20 01:09:30,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-20 01:09:30,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 81. [2020-10-20 01:09:30,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-20 01:09:30,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2020-10-20 01:09:30,917 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 65 [2020-10-20 01:09:30,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:30,917 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2020-10-20 01:09:30,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 01:09:30,918 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2020-10-20 01:09:30,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-20 01:09:30,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:09:30,920 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 5, 5, 5, 1, 1, 1, 1, 1] [2020-10-20 01:09:31,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-20 01:09:31,126 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:09:31,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:09:31,126 INFO L82 PathProgramCache]: Analyzing trace with hash -60302226, now seen corresponding path program 9 times [2020-10-20 01:09:31,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:09:31,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420254538] [2020-10-20 01:09:31,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:09:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:09:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-20 01:09:31,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420254538] [2020-10-20 01:09:31,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756178090] [2020-10-20 01:09:31,224 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:31,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-10-20 01:09:31,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:09:31,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 01:09:31,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:09:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2020-10-20 01:09:31,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 01:09:31,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2020-10-20 01:09:31,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151987208] [2020-10-20 01:09:31,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 01:09:31,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:09:31,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 01:09:31,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:09:31,380 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 8 states. [2020-10-20 01:09:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:09:31,414 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-10-20 01:09:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:09:31,415 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-10-20 01:09:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:09:31,415 INFO L225 Difference]: With dead ends: 81 [2020-10-20 01:09:31,415 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 01:09:31,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:09:31,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 01:09:31,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 01:09:31,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 01:09:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 01:09:31,417 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2020-10-20 01:09:31,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:09:31,417 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 01:09:31,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 01:09:31,417 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 01:09:31,418 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 01:09:31,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:09:31,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 01:09:31,752 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 01:09:31,752 INFO L274 CegarLoopResult]: For program point L25(lines 25 27) no Hoare annotation was computed. [2020-10-20 01:09:31,752 INFO L274 CegarLoopResult]: For program point L21-2(lines 21 23) no Hoare annotation was computed. [2020-10-20 01:09:31,753 INFO L270 CegarLoopResult]: At program point L21-3(lines 21 23) the Hoare annotation is: (and (<= ULTIMATE.start_main_~b~0 6) (<= ULTIMATE.start_main_~a~0 5)) [2020-10-20 01:09:31,753 INFO L274 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-10-20 01:09:31,753 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 01:09:31,753 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 01:09:31,753 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 01:09:31,753 INFO L277 CegarLoopResult]: At program point L28(lines 15 29) the Hoare annotation is: true [2020-10-20 01:09:31,753 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-10-20 01:09:31,753 INFO L274 CegarLoopResult]: For program point L20-2(lines 20 24) no Hoare annotation was computed. [2020-10-20 01:09:31,754 INFO L270 CegarLoopResult]: At program point L20-3(lines 20 24) the Hoare annotation is: (and (<= ULTIMATE.start_main_~a~0 6) (<= ULTIMATE.start_main_~b~0 6) (<= 6 ULTIMATE.start_main_~b~0)) [2020-10-20 01:09:31,754 INFO L274 CegarLoopResult]: For program point L20-4(lines 15 29) no Hoare annotation was computed. [2020-10-20 01:09:31,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:09:31 BoogieIcfgContainer [2020-10-20 01:09:31,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:09:31,773 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:09:31,773 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:09:31,773 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:09:31,774 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:09:26" (3/4) ... [2020-10-20 01:09:31,778 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 01:09:31,789 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-20 01:09:31,789 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 01:09:31,789 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:09:31,789 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:09:31,831 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:09:31,831 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:09:31,835 INFO L168 Benchmark]: Toolchain (without parser) took 5689.83 ms. Allocated memory was 34.6 MB in the beginning and 54.5 MB in the end (delta: 19.9 MB). Free memory was 11.9 MB in the beginning and 11.8 MB in the end (delta: 114.1 kB). Peak memory consumption was 20.0 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:31,836 INFO L168 Benchmark]: CDTParser took 0.94 ms. Allocated memory is still 33.6 MB. Free memory was 18.5 MB in the beginning and 18.5 MB in the end (delta: 41.9 kB). Peak memory consumption was 41.9 kB. Max. memory is 14.3 GB. [2020-10-20 01:09:31,837 INFO L168 Benchmark]: CACSL2BoogieTranslator took 382.16 ms. Allocated memory was 34.6 MB in the beginning and 44.6 MB in the end (delta: 10.0 MB). Free memory was 11.1 MB in the beginning and 24.7 MB in the end (delta: -13.6 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:31,837 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.50 ms. Allocated memory is still 44.6 MB. Free memory was 24.6 MB in the beginning and 23.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:31,838 INFO L168 Benchmark]: Boogie Preprocessor took 24.68 ms. Allocated memory is still 44.6 MB. Free memory was 23.1 MB in the beginning and 21.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:31,839 INFO L168 Benchmark]: RCFGBuilder took 282.19 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 21.7 MB in the beginning and 20.8 MB in the end (delta: 921.5 kB). Peak memory consumption was 8.6 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:31,843 INFO L168 Benchmark]: TraceAbstraction took 4885.58 ms. Allocated memory was 46.1 MB in the beginning and 54.5 MB in the end (delta: 8.4 MB). Free memory was 20.4 MB in the beginning and 14.9 MB in the end (delta: 5.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:31,847 INFO L168 Benchmark]: Witness Printer took 58.44 ms. Allocated memory is still 54.5 MB. Free memory was 14.9 MB in the beginning and 12.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 GB. [2020-10-20 01:09:31,857 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.94 ms. Allocated memory is still 33.6 MB. Free memory was 18.5 MB in the beginning and 18.5 MB in the end (delta: 41.9 kB). Peak memory consumption was 41.9 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 382.16 ms. Allocated memory was 34.6 MB in the beginning and 44.6 MB in the end (delta: 10.0 MB). Free memory was 11.1 MB in the beginning and 24.7 MB in the end (delta: -13.6 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 45.50 ms. Allocated memory is still 44.6 MB. Free memory was 24.6 MB in the beginning and 23.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 24.68 ms. Allocated memory is still 44.6 MB. Free memory was 23.1 MB in the beginning and 21.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 282.19 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 21.7 MB in the beginning and 20.8 MB in the end (delta: 921.5 kB). Peak memory consumption was 8.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4885.58 ms. Allocated memory was 46.1 MB in the beginning and 54.5 MB in the end (delta: 8.4 MB). Free memory was 20.4 MB in the beginning and 14.9 MB in the end (delta: 5.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 14.3 GB. * Witness Printer took 58.44 ms. Allocated memory is still 54.5 MB. Free memory was 14.9 MB in the beginning and 12.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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: 20]: Loop Invariant Derived loop invariant: (a <= 6 && b <= 6) && 6 <= b - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: b <= 6 && a <= 5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 11, TraceHistogramMax: 30, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 98 SDslu, 159 SDs, 0 SdLazy, 218 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 391 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=10, 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, 11 MinimizatonAttempts, 62 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 45 NumberOfFragments, 18 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1545 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 62 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 679 NumberOfCodeBlocks, 604 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 81577 SizeOfPredicates, 10 NumberOfNonLiveVariables, 634 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 20 InterpolantComputations, 3 PerfectInterpolantSequences, 2269/5009 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...