./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_10x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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/recursive-simple/sum_10x0-1.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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1d9bbb15ebabc8fa7bed11dd5ef1fc8e11e37bc .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:30:07,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:30:07,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:30:07,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:30:07,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:30:07,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:30:07,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:30:07,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:30:07,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:30:07,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:30:07,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:30:07,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:30:07,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:30:07,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:30:07,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:30:07,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:30:07,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:30:07,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:30:07,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:30:07,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:30:07,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:30:07,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:30:07,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:30:07,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:30:07,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:30:07,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:30:07,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:30:07,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:30:07,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:30:07,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:30:07,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:30:07,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:30:07,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:30:07,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:30:07,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:30:07,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:30:07,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:30:07,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:30:07,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:30:07,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:30:07,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:30:07,805 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:30:07,832 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:30:07,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:30:07,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:30:07,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:30:07,835 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:30:07,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:30:07,835 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:30:07,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:30:07,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:30:07,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:30:07,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:30:07,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:30:07,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:30:07,836 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:30:07,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:30:07,837 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:30:07,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:30:07,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:30:07,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:30:07,838 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:30:07,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:30:07,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:30:07,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:30:07,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:30:07,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:30:07,839 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:30:07,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:30:07,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:30:07,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:30:07,839 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(__VERIFIER_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 -> b1d9bbb15ebabc8fa7bed11dd5ef1fc8e11e37bc [2019-11-28 17:30:08,137 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:30:08,155 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:30:08,159 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:30:08,161 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:30:08,161 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:30:08,163 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_10x0-1.c [2019-11-28 17:30:08,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cfe8b234/094488a7244d40369aa6ac03e3c4f2aa/FLAG5983c585d [2019-11-28 17:30:08,726 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:30:08,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_10x0-1.c [2019-11-28 17:30:08,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cfe8b234/094488a7244d40369aa6ac03e3c4f2aa/FLAG5983c585d [2019-11-28 17:30:09,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cfe8b234/094488a7244d40369aa6ac03e3c4f2aa [2019-11-28 17:30:09,114 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:30:09,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:30:09,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:30:09,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:30:09,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:30:09,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:30:09" (1/1) ... [2019-11-28 17:30:09,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1192613d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:09, skipping insertion in model container [2019-11-28 17:30:09,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:30:09" (1/1) ... [2019-11-28 17:30:09,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:30:09,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:30:09,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:30:09,308 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:30:09,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:30:09,340 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:30:09,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:09 WrapperNode [2019-11-28 17:30:09,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:30:09,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:30:09,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:30:09,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:30:09,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:09" (1/1) ... [2019-11-28 17:30:09,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:09" (1/1) ... [2019-11-28 17:30:09,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:30:09,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:30:09,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:30:09,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:30:09,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:09" (1/1) ... [2019-11-28 17:30:09,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:09" (1/1) ... [2019-11-28 17:30:09,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:09" (1/1) ... [2019-11-28 17:30:09,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:09" (1/1) ... [2019-11-28 17:30:09,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:09" (1/1) ... [2019-11-28 17:30:09,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:09" (1/1) ... [2019-11-28 17:30:09,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:09" (1/1) ... [2019-11-28 17:30:09,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:30:09,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:30:09,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:30:09,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:30:09,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:09" (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 [2019-11-28 17:30:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:30:09,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:30:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-28 17:30:09,510 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-28 17:30:09,675 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:30:09,676 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 17:30:09,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:30:09 BoogieIcfgContainer [2019-11-28 17:30:09,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:30:09,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:30:09,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:30:09,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:30:09,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:30:09" (1/3) ... [2019-11-28 17:30:09,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56415182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:30:09, skipping insertion in model container [2019-11-28 17:30:09,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:09" (2/3) ... [2019-11-28 17:30:09,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56415182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:30:09, skipping insertion in model container [2019-11-28 17:30:09,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:30:09" (3/3) ... [2019-11-28 17:30:09,685 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2019-11-28 17:30:09,693 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:30:09,700 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:30:09,713 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:30:09,738 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:30:09,738 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:30:09,739 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:30:09,739 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:30:09,739 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:30:09,739 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:30:09,739 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:30:09,739 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:30:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-28 17:30:09,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:30:09,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:09,764 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:09,764 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:09,769 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-28 17:30:09,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:09,777 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941169470] [2019-11-28 17:30:09,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:30:10,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941169470] [2019-11-28 17:30:10,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:30:10,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:30:10,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641510092] [2019-11-28 17:30:10,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:30:10,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:10,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:30:10,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:30:10,053 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-28 17:30:10,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:10,171 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-28 17:30:10,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:30:10,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 17:30:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:10,182 INFO L225 Difference]: With dead ends: 24 [2019-11-28 17:30:10,182 INFO L226 Difference]: Without dead ends: 14 [2019-11-28 17:30:10,185 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:30:10,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-28 17:30:10,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-28 17:30:10,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 17:30:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-28 17:30:10,228 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-28 17:30:10,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:10,228 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-28 17:30:10,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:30:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-28 17:30:10,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 17:30:10,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:10,230 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:10,231 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:10,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:10,231 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-28 17:30:10,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:10,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710816922] [2019-11-28 17:30:10,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 17:30:10,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710816922] [2019-11-28 17:30:10,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873127579] [2019-11-28 17:30:10,376 INFO L94 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 [2019-11-28 17:30:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,414 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 17:30:10,420 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 17:30:10,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:10,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 17:30:10,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789103552] [2019-11-28 17:30:10,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 17:30:10,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:10,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 17:30:10,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:30:10,502 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2019-11-28 17:30:10,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:10,591 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-28 17:30:10,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 17:30:10,592 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-28 17:30:10,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:10,593 INFO L225 Difference]: With dead ends: 21 [2019-11-28 17:30:10,593 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 17:30:10,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:30:10,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 17:30:10,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 17:30:10,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 17:30:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-28 17:30:10,600 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-28 17:30:10,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:10,601 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-28 17:30:10,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 17:30:10,601 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-28 17:30:10,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 17:30:10,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:10,602 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:10,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:10,815 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:10,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:10,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-28 17:30:10,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:10,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401404591] [2019-11-28 17:30:10,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 17:30:10,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401404591] [2019-11-28 17:30:10,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678387898] [2019-11-28 17:30:10,986 INFO L92 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 [2019-11-28 17:30:11,029 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:30:11,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:11,033 INFO L264 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:30:11,036 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 17:30:11,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:11,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-28 17:30:11,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357851201] [2019-11-28 17:30:11,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:30:11,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:11,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:30:11,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:30:11,080 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2019-11-28 17:30:11,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:11,172 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-28 17:30:11,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:30:11,173 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-28 17:30:11,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:11,174 INFO L225 Difference]: With dead ends: 24 [2019-11-28 17:30:11,174 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 17:30:11,176 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:30:11,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 17:30:11,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 17:30:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 17:30:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-28 17:30:11,186 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-28 17:30:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:11,187 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-28 17:30:11,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:30:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-28 17:30:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 17:30:11,190 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:11,191 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:11,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:11,392 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:11,393 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-28 17:30:11,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:11,394 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564439102] [2019-11-28 17:30:11,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 17:30:11,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564439102] [2019-11-28 17:30:11,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781105286] [2019-11-28 17:30:11,604 INFO L92 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 [2019-11-28 17:30:11,644 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 17:30:11,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:11,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 17:30:11,648 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 17:30:11,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:11,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-28 17:30:11,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40823765] [2019-11-28 17:30:11,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 17:30:11,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:11,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 17:30:11,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:30:11,677 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2019-11-28 17:30:11,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:11,769 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-28 17:30:11,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:30:11,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-11-28 17:30:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:11,771 INFO L225 Difference]: With dead ends: 27 [2019-11-28 17:30:11,771 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 17:30:11,772 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:30:11,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 17:30:11,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 17:30:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 17:30:11,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-28 17:30:11,778 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-28 17:30:11,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:11,779 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-28 17:30:11,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 17:30:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-28 17:30:11,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-28 17:30:11,780 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:11,780 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:11,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:11,982 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:11,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:11,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-28 17:30:11,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:11,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665181912] [2019-11-28 17:30:11,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 17:30:12,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665181912] [2019-11-28 17:30:12,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458510560] [2019-11-28 17:30:12,185 INFO L92 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 [2019-11-28 17:30:12,223 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:30:12,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:12,224 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 17:30:12,228 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 17:30:12,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:12,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-28 17:30:12,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897774299] [2019-11-28 17:30:12,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 17:30:12,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:12,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 17:30:12,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:30:12,272 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-11-28 17:30:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:12,371 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-28 17:30:12,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 17:30:12,372 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-11-28 17:30:12,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:12,375 INFO L225 Difference]: With dead ends: 30 [2019-11-28 17:30:12,375 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 17:30:12,376 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-28 17:30:12,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 17:30:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 17:30:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:30:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-28 17:30:12,387 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-28 17:30:12,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:12,388 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-28 17:30:12,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 17:30:12,388 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-28 17:30:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-28 17:30:12,391 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:12,391 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:12,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:12,595 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:12,596 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-28 17:30:12,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:12,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428816236] [2019-11-28 17:30:12,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-28 17:30:12,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428816236] [2019-11-28 17:30:12,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552619815] [2019-11-28 17:30:12,813 INFO L92 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 [2019-11-28 17:30:12,853 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-28 17:30:12,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:12,855 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 17:30:12,858 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-28 17:30:12,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:12,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-28 17:30:12,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013164787] [2019-11-28 17:30:12,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 17:30:12,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:12,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 17:30:12,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:30:12,906 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-28 17:30:13,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:13,009 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-28 17:30:13,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 17:30:13,010 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2019-11-28 17:30:13,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:13,012 INFO L225 Difference]: With dead ends: 33 [2019-11-28 17:30:13,012 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 17:30:13,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-11-28 17:30:13,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 17:30:13,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-28 17:30:13,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 17:30:13,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-28 17:30:13,019 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-28 17:30:13,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:13,020 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-28 17:30:13,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 17:30:13,020 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-28 17:30:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-28 17:30:13,022 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:13,022 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:13,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:13,226 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:13,227 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-28 17:30:13,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:13,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685110449] [2019-11-28 17:30:13,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-28 17:30:13,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685110449] [2019-11-28 17:30:13,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620883088] [2019-11-28 17:30:13,441 INFO L92 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 [2019-11-28 17:30:13,479 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-28 17:30:13,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:13,480 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 17:30:13,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-28 17:30:13,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:13,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-28 17:30:13,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591745772] [2019-11-28 17:30:13,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 17:30:13,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:13,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 17:30:13,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:30:13,566 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2019-11-28 17:30:13,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:13,676 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-28 17:30:13,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 17:30:13,676 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-11-28 17:30:13,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:13,677 INFO L225 Difference]: With dead ends: 36 [2019-11-28 17:30:13,678 INFO L226 Difference]: Without dead ends: 32 [2019-11-28 17:30:13,679 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-11-28 17:30:13,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-28 17:30:13,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-28 17:30:13,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-28 17:30:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-28 17:30:13,685 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-28 17:30:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:13,685 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-28 17:30:13,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 17:30:13,686 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-28 17:30:13,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-28 17:30:13,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:13,688 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:13,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:13,889 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:13,890 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-28 17:30:13,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:13,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323200456] [2019-11-28 17:30:13,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-28 17:30:14,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323200456] [2019-11-28 17:30:14,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449771912] [2019-11-28 17:30:14,165 INFO L92 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 [2019-11-28 17:30:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,228 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 17:30:14,233 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-28 17:30:14,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:14,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-28 17:30:14,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253798361] [2019-11-28 17:30:14,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 17:30:14,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:14,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 17:30:14,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:30:14,300 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 13 states. [2019-11-28 17:30:14,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:14,433 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-28 17:30:14,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 17:30:14,434 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-11-28 17:30:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:14,435 INFO L225 Difference]: With dead ends: 39 [2019-11-28 17:30:14,435 INFO L226 Difference]: Without dead ends: 35 [2019-11-28 17:30:14,436 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2019-11-28 17:30:14,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-28 17:30:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-28 17:30:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-28 17:30:14,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-28 17:30:14,442 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-28 17:30:14,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:14,442 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-28 17:30:14,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 17:30:14,442 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-28 17:30:14,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-28 17:30:14,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:14,444 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:14,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:14,647 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:14,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:14,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-28 17:30:14,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:14,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882787138] [2019-11-28 17:30:14,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-28 17:30:14,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882787138] [2019-11-28 17:30:14,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779720082] [2019-11-28 17:30:14,893 INFO L92 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 [2019-11-28 17:30:14,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:30:14,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:14,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 17:30:14,944 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-28 17:30:14,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:14,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-28 17:30:14,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057327281] [2019-11-28 17:30:14,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 17:30:14,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:14,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 17:30:14,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:30:14,979 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2019-11-28 17:30:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:15,142 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-28 17:30:15,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 17:30:15,143 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2019-11-28 17:30:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:15,144 INFO L225 Difference]: With dead ends: 42 [2019-11-28 17:30:15,144 INFO L226 Difference]: Without dead ends: 38 [2019-11-28 17:30:15,145 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2019-11-28 17:30:15,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-28 17:30:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-28 17:30:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-28 17:30:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-28 17:30:15,150 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-28 17:30:15,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:15,151 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-28 17:30:15,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 17:30:15,151 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-28 17:30:15,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-28 17:30:15,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:15,152 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:15,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:15,355 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:15,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:15,356 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-28 17:30:15,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:15,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841160369] [2019-11-28 17:30:15,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-28 17:30:15,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841160369] [2019-11-28 17:30:15,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762765926] [2019-11-28 17:30:15,800 INFO L92 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 [2019-11-28 17:30:15,854 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-28 17:30:15,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:15,856 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-28 17:30:15,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-28 17:30:15,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:15,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-28 17:30:15,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091730809] [2019-11-28 17:30:15,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 17:30:15,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:15,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 17:30:15,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-28 17:30:15,923 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2019-11-28 17:30:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:16,060 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-28 17:30:16,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 17:30:16,060 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-11-28 17:30:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:16,062 INFO L225 Difference]: With dead ends: 45 [2019-11-28 17:30:16,062 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 17:30:16,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2019-11-28 17:30:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 17:30:16,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-28 17:30:16,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-28 17:30:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-28 17:30:16,076 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-28 17:30:16,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:16,076 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-28 17:30:16,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 17:30:16,077 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-28 17:30:16,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-28 17:30:16,079 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:16,079 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:16,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:16,280 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:16,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:16,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-28 17:30:16,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:16,281 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660709631] [2019-11-28 17:30:16,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 144 proven. 20 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-28 17:30:17,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660709631] [2019-11-28 17:30:17,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358958955] [2019-11-28 17:30:17,218 INFO L92 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:17,265 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:30:17,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:17,271 WARN L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 135 conjunts are in the unsatisfiable core [2019-11-28 17:30:17,277 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2019-11-28 17:30:17,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 17:30:17,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [28] total 30 [2019-11-28 17:30:17,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599274239] [2019-11-28 17:30:17,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 17:30:17,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:17,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 17:30:17,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2019-11-28 17:30:17,392 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 7 states. [2019-11-28 17:30:17,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:17,479 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2019-11-28 17:30:17,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:30:17,480 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2019-11-28 17:30:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:17,480 INFO L225 Difference]: With dead ends: 41 [2019-11-28 17:30:17,480 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 17:30:17,482 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2019-11-28 17:30:17,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 17:30:17,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 17:30:17,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 17:30:17,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 17:30:17,483 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2019-11-28 17:30:17,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:17,483 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 17:30:17,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 17:30:17,483 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 17:30:17,483 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 17:30:17,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:17,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 17:30:17,714 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 17:30:17,714 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 17:30:17,714 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 17:30:17,714 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2019-11-28 17:30:17,714 INFO L246 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2019-11-28 17:30:17,714 INFO L246 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-11-28 17:30:17,715 INFO L242 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (<= 10 ULTIMATE.start_main_~a~0) [2019-11-28 17:30:17,715 INFO L246 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2019-11-28 17:30:17,715 INFO L246 CegarLoopResult]: For program point L11(lines 11 18) no Hoare annotation was computed. [2019-11-28 17:30:17,715 INFO L246 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2019-11-28 17:30:17,715 INFO L242 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|)) [2019-11-28 17:30:17,715 INFO L246 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2019-11-28 17:30:17,715 INFO L246 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2019-11-28 17:30:17,715 INFO L246 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2019-11-28 17:30:17,715 INFO L249 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2019-11-28 17:30:17,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:30:17 BoogieIcfgContainer [2019-11-28 17:30:17,720 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:30:17,720 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:30:17,720 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:30:17,721 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:30:17,721 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:30:09" (3/4) ... [2019-11-28 17:30:17,723 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 17:30:17,729 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2019-11-28 17:30:17,732 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 17:30:17,732 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-28 17:30:17,765 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:30:17,765 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:30:17,768 INFO L168 Benchmark]: Toolchain (without parser) took 8651.69 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 302.0 MB). Free memory was 956.3 MB in the beginning and 1.2 GB in the end (delta: -202.5 MB). Peak memory consumption was 99.5 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:17,768 INFO L168 Benchmark]: CDTParser took 0.86 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:30:17,769 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.48 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 944.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:17,769 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.52 ms. Allocated memory is still 1.0 GB. Free memory is still 944.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:30:17,770 INFO L168 Benchmark]: Boogie Preprocessor took 73.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -182.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:17,770 INFO L168 Benchmark]: RCFGBuilder took 224.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:17,771 INFO L168 Benchmark]: TraceAbstraction took 8042.05 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 171.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -58.7 MB). Peak memory consumption was 112.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:17,772 INFO L168 Benchmark]: Witness Printer took 45.16 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:17,775 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.86 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 225.48 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 944.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 35.52 ms. Allocated memory is still 1.0 GB. Free memory is still 944.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 73.91 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -182.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 224.51 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8042.05 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 171.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -58.7 MB). Peak memory consumption was 112.8 MB. Max. memory is 11.5 GB. * Witness Printer took 45.16 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 7.9s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 87 SDtfs, 184 SDslu, 272 SDs, 0 SdLazy, 369 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 700 GetRequests, 529 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 849 NumberOfCodeBlocks, 844 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 828 ConstructedInterpolants, 0 QuantifiedInterpolants, 137084 SizeOfPredicates, 88 NumberOfNonLiveVariables, 1250 ConjunctsInSsa, 261 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 1500/2420 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...