./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum05.i --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/reducercommutativity/rangesum05.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1633e43e3f340ce4ae371cafc3d1ea0a9dad5739 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 15:22:24,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 15:22:24,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 15:22:24,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 15:22:24,781 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 15:22:24,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 15:22:24,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 15:22:24,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 15:22:24,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 15:22:24,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 15:22:24,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 15:22:24,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 15:22:24,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 15:22:24,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 15:22:24,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 15:22:24,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 15:22:24,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 15:22:24,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 15:22:24,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 15:22:24,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 15:22:24,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 15:22:24,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 15:22:24,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 15:22:24,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 15:22:24,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 15:22:24,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 15:22:24,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 15:22:24,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 15:22:24,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 15:22:24,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 15:22:24,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 15:22:24,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 15:22:24,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 15:22:24,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 15:22:24,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 15:22:24,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 15:22:24,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 15:22:24,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 15:22:24,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 15:22:24,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 15:22:24,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 15:22:24,827 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 15:22:24,846 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 15:22:24,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 15:22:24,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 15:22:24,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 15:22:24,848 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 15:22:24,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 15:22:24,849 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 15:22:24,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 15:22:24,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 15:22:24,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 15:22:24,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 15:22:24,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 15:22:24,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 15:22:24,851 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 15:22:24,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 15:22:24,852 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 15:22:24,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 15:22:24,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 15:22:24,853 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 15:22:24,853 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 15:22:24,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 15:22:24,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 15:22:24,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 15:22:24,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 15:22:24,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 15:22:24,855 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 15:22:24,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 15:22:24,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 15:22:24,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 15:22:24,856 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 -> 1633e43e3f340ce4ae371cafc3d1ea0a9dad5739 [2019-11-28 15:22:25,219 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 15:22:25,237 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 15:22:25,241 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 15:22:25,243 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 15:22:25,244 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 15:22:25,245 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum05.i [2019-11-28 15:22:25,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f785b16e1/3e7ad36a6fc74df68daa6938f8b5a15d/FLAG622007f4e [2019-11-28 15:22:25,822 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 15:22:25,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum05.i [2019-11-28 15:22:25,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f785b16e1/3e7ad36a6fc74df68daa6938f8b5a15d/FLAG622007f4e [2019-11-28 15:22:26,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f785b16e1/3e7ad36a6fc74df68daa6938f8b5a15d [2019-11-28 15:22:26,197 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 15:22:26,199 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 15:22:26,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 15:22:26,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 15:22:26,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 15:22:26,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:22:26" (1/1) ... [2019-11-28 15:22:26,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b7bf631 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:26, skipping insertion in model container [2019-11-28 15:22:26,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:22:26" (1/1) ... [2019-11-28 15:22:26,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 15:22:26,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 15:22:26,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:22:26,463 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 15:22:26,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:22:26,565 INFO L208 MainTranslator]: Completed translation [2019-11-28 15:22:26,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:26 WrapperNode [2019-11-28 15:22:26,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 15:22:26,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 15:22:26,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 15:22:26,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 15:22:26,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:26" (1/1) ... [2019-11-28 15:22:26,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:26" (1/1) ... [2019-11-28 15:22:26,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 15:22:26,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 15:22:26,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 15:22:26,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 15:22:26,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:26" (1/1) ... [2019-11-28 15:22:26,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:26" (1/1) ... [2019-11-28 15:22:26,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:26" (1/1) ... [2019-11-28 15:22:26,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:26" (1/1) ... [2019-11-28 15:22:26,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:26" (1/1) ... [2019-11-28 15:22:26,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:26" (1/1) ... [2019-11-28 15:22:26,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:26" (1/1) ... [2019-11-28 15:22:26,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 15:22:26,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 15:22:26,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 15:22:26,661 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 15:22:26,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 15:22:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 15:22:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 15:22:26,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 15:22:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 15:22:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 15:22:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 15:22:27,113 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 15:22:27,114 INFO L287 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-28 15:22:27,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:22:27 BoogieIcfgContainer [2019-11-28 15:22:27,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 15:22:27,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 15:22:27,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 15:22:27,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 15:22:27,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:22:26" (1/3) ... [2019-11-28 15:22:27,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366704e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:22:27, skipping insertion in model container [2019-11-28 15:22:27,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:26" (2/3) ... [2019-11-28 15:22:27,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366704e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:22:27, skipping insertion in model container [2019-11-28 15:22:27,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:22:27" (3/3) ... [2019-11-28 15:22:27,130 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2019-11-28 15:22:27,143 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 15:22:27,151 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 15:22:27,164 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 15:22:27,185 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 15:22:27,186 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 15:22:27,186 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 15:22:27,186 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 15:22:27,187 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 15:22:27,187 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 15:22:27,187 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 15:22:27,187 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 15:22:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-28 15:22:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 15:22:27,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:27,209 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:27,209 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:27,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:27,216 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2019-11-28 15:22:27,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:27,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333000279] [2019-11-28 15:22:27,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:27,355 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 15:22:27,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333000279] [2019-11-28 15:22:27,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:22:27,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 15:22:27,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411170595] [2019-11-28 15:22:27,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 15:22:27,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:27,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 15:22:27,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 15:22:27,386 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-11-28 15:22:27,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:27,404 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2019-11-28 15:22:27,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 15:22:27,405 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-28 15:22:27,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:27,416 INFO L225 Difference]: With dead ends: 56 [2019-11-28 15:22:27,416 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 15:22:27,419 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 15:22:27,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 15:22:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 15:22:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 15:22:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-11-28 15:22:27,452 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2019-11-28 15:22:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:27,452 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-11-28 15:22:27,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 15:22:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-11-28 15:22:27,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 15:22:27,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:27,454 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:27,454 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:27,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:27,455 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2019-11-28 15:22:27,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:27,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110856330] [2019-11-28 15:22:27,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:27,470 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:27,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410467413] [2019-11-28 15:22:27,471 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 15:22:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:27,560 INFO L264 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 15:22:27,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:27,591 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 15:22:27,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110856330] [2019-11-28 15:22:27,592 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:27,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410467413] [2019-11-28 15:22:27,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:22:27,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 15:22:27,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109942629] [2019-11-28 15:22:27,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 15:22:27,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:27,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 15:22:27,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:22:27,597 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2019-11-28 15:22:27,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:27,624 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2019-11-28 15:22:27,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 15:22:27,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-28 15:22:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:27,627 INFO L225 Difference]: With dead ends: 50 [2019-11-28 15:22:27,627 INFO L226 Difference]: Without dead ends: 28 [2019-11-28 15:22:27,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:22:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-28 15:22:27,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-28 15:22:27,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-28 15:22:27,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-28 15:22:27,641 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2019-11-28 15:22:27,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:27,641 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-28 15:22:27,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 15:22:27,642 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-28 15:22:27,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-28 15:22:27,644 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:27,644 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:27,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:27,849 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:27,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:27,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2019-11-28 15:22:27,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:27,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597222355] [2019-11-28 15:22:27,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:27,888 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:27,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359198122] [2019-11-28 15:22:27,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:27,975 INFO L264 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 15:22:27,979 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 15:22:27,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597222355] [2019-11-28 15:22:27,996 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:27,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359198122] [2019-11-28 15:22:27,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:22:27,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 15:22:27,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944685613] [2019-11-28 15:22:27,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 15:22:28,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:28,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 15:22:28,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:22:28,002 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2019-11-28 15:22:28,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:28,075 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2019-11-28 15:22:28,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 15:22:28,076 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-28 15:22:28,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:28,077 INFO L225 Difference]: With dead ends: 57 [2019-11-28 15:22:28,078 INFO L226 Difference]: Without dead ends: 36 [2019-11-28 15:22:28,078 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:22:28,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-28 15:22:28,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-28 15:22:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-28 15:22:28,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2019-11-28 15:22:28,086 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2019-11-28 15:22:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:28,086 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2019-11-28 15:22:28,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 15:22:28,087 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2019-11-28 15:22:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-28 15:22:28,088 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:28,088 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:28,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:28,292 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2019-11-28 15:22:28,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:28,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557430039] [2019-11-28 15:22:28,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:28,310 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:28,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406556795] [2019-11-28 15:22:28,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:22:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:28,375 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 15:22:28,377 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-28 15:22:28,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557430039] [2019-11-28 15:22:28,386 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:28,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406556795] [2019-11-28 15:22:28,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:22:28,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 15:22:28,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510343551] [2019-11-28 15:22:28,388 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 15:22:28,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:28,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 15:22:28,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:22:28,390 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2019-11-28 15:22:28,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:28,508 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2019-11-28 15:22:28,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 15:22:28,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-28 15:22:28,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:28,511 INFO L225 Difference]: With dead ends: 75 [2019-11-28 15:22:28,511 INFO L226 Difference]: Without dead ends: 54 [2019-11-28 15:22:28,512 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:22:28,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-28 15:22:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2019-11-28 15:22:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-28 15:22:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2019-11-28 15:22:28,527 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 28 [2019-11-28 15:22:28,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:28,527 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2019-11-28 15:22:28,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 15:22:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2019-11-28 15:22:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-28 15:22:28,531 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:28,531 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:28,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:28,743 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:28,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:28,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1168464304, now seen corresponding path program 1 times [2019-11-28 15:22:28,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:28,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486396933] [2019-11-28 15:22:28,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-28 15:22:28,816 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486396933] [2019-11-28 15:22:28,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:22:28,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 15:22:28,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651522561] [2019-11-28 15:22:28,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 15:22:28,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:28,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 15:22:28,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:28,819 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 4 states. [2019-11-28 15:22:28,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:28,927 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2019-11-28 15:22:28,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 15:22:28,928 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-11-28 15:22:28,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:28,929 INFO L225 Difference]: With dead ends: 85 [2019-11-28 15:22:28,929 INFO L226 Difference]: Without dead ends: 54 [2019-11-28 15:22:28,929 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:28,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-28 15:22:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2019-11-28 15:22:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-28 15:22:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-28 15:22:28,937 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 28 [2019-11-28 15:22:28,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:28,937 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-28 15:22:28,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 15:22:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-28 15:22:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-28 15:22:28,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:28,939 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:28,940 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:28,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:28,941 INFO L82 PathProgramCache]: Analyzing trace with hash -483510003, now seen corresponding path program 1 times [2019-11-28 15:22:28,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:28,941 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747430960] [2019-11-28 15:22:28,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:28,954 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:28,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153065093] [2019-11-28 15:22:28,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:22:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:29,024 INFO L264 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 15:22:29,027 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-28 15:22:29,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747430960] [2019-11-28 15:22:29,042 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:29,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153065093] [2019-11-28 15:22:29,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:22:29,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 15:22:29,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255232927] [2019-11-28 15:22:29,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 15:22:29,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:29,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 15:22:29,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:22:29,054 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2019-11-28 15:22:29,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:29,072 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-11-28 15:22:29,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 15:22:29,073 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-28 15:22:29,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:29,074 INFO L225 Difference]: With dead ends: 54 [2019-11-28 15:22:29,074 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 15:22:29,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:22:29,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 15:22:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-28 15:22:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-28 15:22:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-28 15:22:29,081 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 37 [2019-11-28 15:22:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:29,082 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-28 15:22:29,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 15:22:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-28 15:22:29,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-28 15:22:29,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:29,084 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:29,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:29,288 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:29,289 INFO L82 PathProgramCache]: Analyzing trace with hash -623311861, now seen corresponding path program 1 times [2019-11-28 15:22:29,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:29,289 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568842965] [2019-11-28 15:22:29,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:29,305 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:29,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771821782] [2019-11-28 15:22:29,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:22:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:29,368 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 15:22:29,374 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-28 15:22:29,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568842965] [2019-11-28 15:22:29,414 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:29,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771821782] [2019-11-28 15:22:29,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:29,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-28 15:22:29,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386273374] [2019-11-28 15:22:29,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 15:22:29,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:29,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 15:22:29,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:29,417 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 4 states. [2019-11-28 15:22:29,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:29,437 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2019-11-28 15:22:29,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 15:22:29,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-11-28 15:22:29,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:29,438 INFO L225 Difference]: With dead ends: 78 [2019-11-28 15:22:29,438 INFO L226 Difference]: Without dead ends: 43 [2019-11-28 15:22:29,439 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-28 15:22:29,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-28 15:22:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-28 15:22:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-11-28 15:22:29,445 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 39 [2019-11-28 15:22:29,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:29,446 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-11-28 15:22:29,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 15:22:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-11-28 15:22:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-28 15:22:29,447 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:29,448 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:29,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:29,651 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:29,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:29,652 INFO L82 PathProgramCache]: Analyzing trace with hash -526389047, now seen corresponding path program 2 times [2019-11-28 15:22:29,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:29,653 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596419813] [2019-11-28 15:22:29,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:29,672 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:29,672 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789698536] [2019-11-28 15:22:29,673 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 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 15:22:29,749 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 15:22:29,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:22:29,751 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 15:22:29,753 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 15:22:29,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596419813] [2019-11-28 15:22:29,771 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:29,772 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789698536] [2019-11-28 15:22:29,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:29,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-28 15:22:29,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166504351] [2019-11-28 15:22:29,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 15:22:29,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:29,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 15:22:29,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:29,775 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 4 states. [2019-11-28 15:22:29,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:29,834 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2019-11-28 15:22:29,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 15:22:29,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-11-28 15:22:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:29,835 INFO L225 Difference]: With dead ends: 86 [2019-11-28 15:22:29,835 INFO L226 Difference]: Without dead ends: 54 [2019-11-28 15:22:29,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-28 15:22:29,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-11-28 15:22:29,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-28 15:22:29,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-11-28 15:22:29,843 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2019-11-28 15:22:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:29,843 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-11-28 15:22:29,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 15:22:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-11-28 15:22:29,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-28 15:22:29,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:29,845 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:30,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:30,050 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:30,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:30,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1393104750, now seen corresponding path program 3 times [2019-11-28 15:22:30,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:30,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329601782] [2019-11-28 15:22:30,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:30,073 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:30,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762862196] [2019-11-28 15:22:30,074 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 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 15:22:30,161 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-28 15:22:30,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:22:30,163 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 15:22:30,166 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-28 15:22:30,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329601782] [2019-11-28 15:22:30,189 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:30,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762862196] [2019-11-28 15:22:30,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:30,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-28 15:22:30,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581223305] [2019-11-28 15:22:30,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 15:22:30,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:30,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 15:22:30,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:30,192 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 4 states. [2019-11-28 15:22:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:30,218 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2019-11-28 15:22:30,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 15:22:30,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-11-28 15:22:30,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:30,221 INFO L225 Difference]: With dead ends: 70 [2019-11-28 15:22:30,222 INFO L226 Difference]: Without dead ends: 54 [2019-11-28 15:22:30,223 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-28 15:22:30,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-28 15:22:30,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-28 15:22:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2019-11-28 15:22:30,238 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 50 [2019-11-28 15:22:30,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:30,240 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2019-11-28 15:22:30,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 15:22:30,240 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2019-11-28 15:22:30,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-28 15:22:30,241 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:30,243 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:30,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:30,444 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:30,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:30,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1656359148, now seen corresponding path program 4 times [2019-11-28 15:22:30,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:30,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751616713] [2019-11-28 15:22:30,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:30,463 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:30,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575914376] [2019-11-28 15:22:30,464 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 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 15:22:30,527 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 15:22:30,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:22:30,531 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 15:22:30,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-28 15:22:30,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751616713] [2019-11-28 15:22:30,563 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:30,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575914376] [2019-11-28 15:22:30,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:30,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-28 15:22:30,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666211846] [2019-11-28 15:22:30,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 15:22:30,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:30,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 15:22:30,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-28 15:22:30,566 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 5 states. [2019-11-28 15:22:30,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:30,636 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2019-11-28 15:22:30,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 15:22:30,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-11-28 15:22:30,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:30,638 INFO L225 Difference]: With dead ends: 102 [2019-11-28 15:22:30,638 INFO L226 Difference]: Without dead ends: 62 [2019-11-28 15:22:30,638 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-28 15:22:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-28 15:22:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-28 15:22:30,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-28 15:22:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2019-11-28 15:22:30,645 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 52 [2019-11-28 15:22:30,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:30,645 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2019-11-28 15:22:30,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 15:22:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2019-11-28 15:22:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-28 15:22:30,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:30,647 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:30,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:30,854 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:30,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:30,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2133276057, now seen corresponding path program 5 times [2019-11-28 15:22:30,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:30,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183345546] [2019-11-28 15:22:30,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:30,867 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:30,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113290090] [2019-11-28 15:22:30,867 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 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 15:22:30,942 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-28 15:22:30,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:22:30,944 INFO L264 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 15:22:30,947 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-28 15:22:30,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183345546] [2019-11-28 15:22:30,971 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:30,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113290090] [2019-11-28 15:22:30,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:22:30,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 15:22:30,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262028345] [2019-11-28 15:22:30,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 15:22:30,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:30,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 15:22:30,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:30,973 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 4 states. [2019-11-28 15:22:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:31,014 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2019-11-28 15:22:31,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 15:22:31,015 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-11-28 15:22:31,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:31,016 INFO L225 Difference]: With dead ends: 111 [2019-11-28 15:22:31,016 INFO L226 Difference]: Without dead ends: 71 [2019-11-28 15:22:31,017 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:31,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-28 15:22:31,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2019-11-28 15:22:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-28 15:22:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2019-11-28 15:22:31,023 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 61 [2019-11-28 15:22:31,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:31,024 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2019-11-28 15:22:31,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 15:22:31,024 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2019-11-28 15:22:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-28 15:22:31,025 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:31,025 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:31,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:31,230 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:31,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:31,231 INFO L82 PathProgramCache]: Analyzing trace with hash 2021142629, now seen corresponding path program 1 times [2019-11-28 15:22:31,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:31,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956696778] [2019-11-28 15:22:31,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:31,247 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:31,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567638759] [2019-11-28 15:22:31,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:22:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:31,326 INFO L264 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 15:22:31,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-28 15:22:31,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956696778] [2019-11-28 15:22:31,377 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:31,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567638759] [2019-11-28 15:22:31,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:31,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-28 15:22:31,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473568180] [2019-11-28 15:22:31,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 15:22:31,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:31,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 15:22:31,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-28 15:22:31,379 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 5 states. [2019-11-28 15:22:31,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:31,402 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2019-11-28 15:22:31,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 15:22:31,403 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-11-28 15:22:31,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:31,404 INFO L225 Difference]: With dead ends: 120 [2019-11-28 15:22:31,404 INFO L226 Difference]: Without dead ends: 65 [2019-11-28 15:22:31,406 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-28 15:22:31,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-28 15:22:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-28 15:22:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-28 15:22:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2019-11-28 15:22:31,424 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 61 [2019-11-28 15:22:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:31,424 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2019-11-28 15:22:31,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 15:22:31,425 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2019-11-28 15:22:31,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-28 15:22:31,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:31,426 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:31,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:31,631 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:31,632 INFO L82 PathProgramCache]: Analyzing trace with hash 265673379, now seen corresponding path program 2 times [2019-11-28 15:22:31,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:31,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979107683] [2019-11-28 15:22:31,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:31,645 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:31,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492907151] [2019-11-28 15:22:31,646 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:31,728 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 15:22:31,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:22:31,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 15:22:31,732 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-28 15:22:31,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979107683] [2019-11-28 15:22:31,766 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:31,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492907151] [2019-11-28 15:22:31,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:31,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-28 15:22:31,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904630152] [2019-11-28 15:22:31,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 15:22:31,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:31,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 15:22:31,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-28 15:22:31,769 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 6 states. [2019-11-28 15:22:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:31,793 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2019-11-28 15:22:31,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 15:22:31,794 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2019-11-28 15:22:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:31,794 INFO L225 Difference]: With dead ends: 122 [2019-11-28 15:22:31,795 INFO L226 Difference]: Without dead ends: 67 [2019-11-28 15:22:31,795 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-28 15:22:31,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-28 15:22:31,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-28 15:22:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-28 15:22:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2019-11-28 15:22:31,801 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 63 [2019-11-28 15:22:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:31,801 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2019-11-28 15:22:31,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 15:22:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2019-11-28 15:22:31,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-28 15:22:31,802 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:31,803 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:32,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:32,015 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:32,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:32,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1181871457, now seen corresponding path program 3 times [2019-11-28 15:22:32,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:32,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334061339] [2019-11-28 15:22:32,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:32,031 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:32,031 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784560932] [2019-11-28 15:22:32,031 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:32,094 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-28 15:22:32,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:22:32,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 15:22:32,097 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-28 15:22:32,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334061339] [2019-11-28 15:22:32,149 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:32,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784560932] [2019-11-28 15:22:32,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:32,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-28 15:22:32,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100787151] [2019-11-28 15:22:32,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 15:22:32,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:32,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 15:22:32,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-28 15:22:32,151 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 5 states. [2019-11-28 15:22:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:32,173 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2019-11-28 15:22:32,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 15:22:32,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2019-11-28 15:22:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:32,174 INFO L225 Difference]: With dead ends: 88 [2019-11-28 15:22:32,174 INFO L226 Difference]: Without dead ends: 69 [2019-11-28 15:22:32,175 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-28 15:22:32,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-28 15:22:32,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-11-28 15:22:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-28 15:22:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2019-11-28 15:22:32,180 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 65 [2019-11-28 15:22:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:32,180 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2019-11-28 15:22:32,180 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 15:22:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2019-11-28 15:22:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-28 15:22:32,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:32,181 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:32,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:32,392 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:32,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1302328097, now seen corresponding path program 4 times [2019-11-28 15:22:32,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:32,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178031738] [2019-11-28 15:22:32,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:32,407 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:32,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609345230] [2019-11-28 15:22:32,408 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:32,456 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 15:22:32,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:22:32,457 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 15:22:32,458 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-28 15:22:32,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178031738] [2019-11-28 15:22:32,503 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:32,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609345230] [2019-11-28 15:22:32,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:32,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-28 15:22:32,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169892681] [2019-11-28 15:22:32,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 15:22:32,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:32,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 15:22:32,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-28 15:22:32,504 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 7 states. [2019-11-28 15:22:32,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:32,602 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2019-11-28 15:22:32,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 15:22:32,603 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2019-11-28 15:22:32,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:32,604 INFO L225 Difference]: With dead ends: 120 [2019-11-28 15:22:32,604 INFO L226 Difference]: Without dead ends: 77 [2019-11-28 15:22:32,605 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-28 15:22:32,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-28 15:22:32,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-11-28 15:22:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-28 15:22:32,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-11-28 15:22:32,611 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 67 [2019-11-28 15:22:32,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:32,611 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-11-28 15:22:32,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 15:22:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-11-28 15:22:32,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-28 15:22:32,613 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:32,613 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:32,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:32,822 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:32,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:32,823 INFO L82 PathProgramCache]: Analyzing trace with hash -153484414, now seen corresponding path program 5 times [2019-11-28 15:22:32,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:32,823 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819419459] [2019-11-28 15:22:32,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:32,843 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:32,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942024593] [2019-11-28 15:22:32,844 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:32,922 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-28 15:22:32,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:22:32,923 INFO L264 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 15:22:32,925 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-28 15:22:32,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819419459] [2019-11-28 15:22:32,956 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:32,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942024593] [2019-11-28 15:22:32,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:32,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-28 15:22:32,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015433885] [2019-11-28 15:22:32,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 15:22:32,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:32,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 15:22:32,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-28 15:22:32,958 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 7 states. [2019-11-28 15:22:32,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:32,987 INFO L93 Difference]: Finished difference Result 145 states and 165 transitions. [2019-11-28 15:22:32,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 15:22:32,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2019-11-28 15:22:32,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:32,989 INFO L225 Difference]: With dead ends: 145 [2019-11-28 15:22:32,989 INFO L226 Difference]: Without dead ends: 79 [2019-11-28 15:22:32,989 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-28 15:22:32,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-28 15:22:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-11-28 15:22:32,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-28 15:22:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2019-11-28 15:22:32,994 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 76 [2019-11-28 15:22:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:32,995 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2019-11-28 15:22:32,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 15:22:32,995 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2019-11-28 15:22:32,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-28 15:22:32,996 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:32,996 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:33,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:33,206 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:33,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:33,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1735993980, now seen corresponding path program 6 times [2019-11-28 15:22:33,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:33,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804199156] [2019-11-28 15:22:33,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:33,222 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:33,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565565463] [2019-11-28 15:22:33,223 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:53,345 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-28 15:22:53,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:22:53,347 INFO L264 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 15:22:53,349 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-28 15:22:53,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804199156] [2019-11-28 15:22:53,379 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:53,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565565463] [2019-11-28 15:22:53,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:53,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-28 15:22:53,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246399681] [2019-11-28 15:22:53,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 15:22:53,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:53,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 15:22:53,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-28 15:22:53,381 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 6 states. [2019-11-28 15:22:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:53,406 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2019-11-28 15:22:53,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 15:22:53,407 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2019-11-28 15:22:53,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:53,408 INFO L225 Difference]: With dead ends: 103 [2019-11-28 15:22:53,408 INFO L226 Difference]: Without dead ends: 81 [2019-11-28 15:22:53,409 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-28 15:22:53,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-28 15:22:53,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-28 15:22:53,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-28 15:22:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2019-11-28 15:22:53,414 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 78 [2019-11-28 15:22:53,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:53,414 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2019-11-28 15:22:53,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 15:22:53,415 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2019-11-28 15:22:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-28 15:22:53,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:53,416 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:53,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:53,627 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:53,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:53,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1345801862, now seen corresponding path program 7 times [2019-11-28 15:22:53,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:53,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932363185] [2019-11-28 15:22:53,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:53,642 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:53,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557455023] [2019-11-28 15:22:53,643 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:22:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:22:54,092 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 15:22:54,092 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 15:22:54,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:54,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:22:54 BoogieIcfgContainer [2019-11-28 15:22:54,387 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 15:22:54,387 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 15:22:54,387 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 15:22:54,388 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 15:22:54,388 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:22:27" (3/4) ... [2019-11-28 15:22:54,391 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 15:22:54,483 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 15:22:54,483 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 15:22:54,486 INFO L168 Benchmark]: Toolchain (without parser) took 28286.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.5 MB). Free memory was 961.7 MB in the beginning and 925.0 MB in the end (delta: 36.7 MB). Peak memory consumption was 199.2 MB. Max. memory is 11.5 GB. [2019-11-28 15:22:54,486 INFO L168 Benchmark]: CDTParser took 0.96 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 15:22:54,487 INFO L168 Benchmark]: CACSL2BoogieTranslator took 365.76 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 73.9 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -108.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:22:54,487 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.30 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-11-28 15:22:54,487 INFO L168 Benchmark]: Boogie Preprocessor took 33.89 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 15:22:54,488 INFO L168 Benchmark]: RCFGBuilder took 455.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 11.5 GB. [2019-11-28 15:22:54,488 INFO L168 Benchmark]: TraceAbstraction took 27270.29 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 88.6 MB). Free memory was 1.0 GB in the beginning and 932.8 MB in the end (delta: 102.7 MB). Peak memory consumption was 191.3 MB. Max. memory is 11.5 GB. [2019-11-28 15:22:54,489 INFO L168 Benchmark]: Witness Printer took 96.37 ms. Allocated memory is still 1.2 GB. Free memory was 932.8 MB in the beginning and 925.0 MB in the end (delta: 7.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 11.5 GB. [2019-11-28 15:22:54,491 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.96 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 365.76 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 73.9 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -108.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 59.30 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 33.89 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 455.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 27270.29 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 88.6 MB). Free memory was 1.0 GB in the beginning and 932.8 MB in the end (delta: 102.7 MB). Peak memory consumption was 191.3 MB. Max. memory is 11.5 GB. * Witness Printer took 96.37 ms. Allocated memory is still 1.2 GB. Free memory was 932.8 MB in the beginning and 925.0 MB in the end (delta: 7.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L31] int x[5]; [L5] int i; [L6] i = 0 [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND TRUE i < 5 [L7] x[i] = __VERIFIER_nondet_int() [L6] i++ [L6] COND FALSE !(i < 5) [L33] int temp; [L34] int ret; [L35] int ret2; [L36] int ret5; [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 5) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L38] ret = rangesum(x) [L40] EXPR x[0] [L40] temp=x[0] [L40] EXPR x[1] [L40] x[0] = x[1] [L40] x[1] = temp [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 5) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L41] ret2 = rangesum(x) [L42] EXPR x[0] [L42] temp=x[0] [L43] int i =0 ; [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND TRUE i<5 -1 [L44] EXPR x[i+1] [L44] x[i] = x[i+1] [L43] i++ [L43] COND FALSE !(i<5 -1) [L46] x[5 -1] = temp [L13] int i; [L14] long long ret; [L15] ret = 0 [L16] int cnt = 0; [L17] i = 0 [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND FALSE !(i > 5/2) [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND TRUE i < 5 [L18] COND TRUE i > 5/2 [L19] EXPR x[i] [L19] ret = ret + x[i] [L20] cnt = cnt + 1 [L17] i++ [L17] COND FALSE !(i < 5) [L23] COND TRUE cnt !=0 [L24] return ret / cnt; [L47] ret5 = rangesum(x) [L49] COND TRUE ret != ret2 || ret !=ret5 [L50] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Result: UNSAFE, OverallTime: 27.1s, OverallIterations: 18, TraceHistogramMax: 5, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 523 SDtfs, 187 SDslu, 565 SDs, 0 SdLazy, 304 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 745 GetRequests, 704 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 46 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 20.7s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 879 NumberOfCodeBlocks, 816 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 782 ConstructedInterpolants, 0 QuantifiedInterpolants, 52874 SizeOfPredicates, 14 NumberOfNonLiveVariables, 2308 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 17 InterpolantComputations, 7 PerfectInterpolantSequences, 745/820 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 incorrect! Received shutdown request...