./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 678e0110 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 0.1.24-678e011 [2019-11-19 20:46:10,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 20:46:10,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 20:46:10,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 20:46:10,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 20:46:10,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 20:46:10,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 20:46:10,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 20:46:10,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 20:46:10,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 20:46:10,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 20:46:10,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 20:46:10,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 20:46:10,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 20:46:10,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 20:46:10,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 20:46:10,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 20:46:10,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 20:46:10,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 20:46:10,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 20:46:10,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 20:46:10,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 20:46:10,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 20:46:10,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 20:46:10,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 20:46:10,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 20:46:10,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 20:46:10,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 20:46:10,238 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 20:46:10,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 20:46:10,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 20:46:10,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 20:46:10,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 20:46:10,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 20:46:10,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 20:46:10,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 20:46:10,245 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 20:46:10,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 20:46:10,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 20:46:10,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 20:46:10,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 20:46:10,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 20:46:10,263 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 20:46:10,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 20:46:10,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 20:46:10,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 20:46:10,265 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 20:46:10,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 20:46:10,266 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 20:46:10,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 20:46:10,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 20:46:10,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 20:46:10,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 20:46:10,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 20:46:10,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 20:46:10,268 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 20:46:10,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 20:46:10,268 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 20:46:10,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 20:46:10,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 20:46:10,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 20:46:10,269 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 20:46:10,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 20:46:10,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 20:46:10,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 20:46:10,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 20:46:10,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 20:46:10,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 20:46:10,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 20:46:10,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 20:46:10,272 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 [2019-11-19 20:46:10,582 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 20:46:10,596 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 20:46:10,600 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 20:46:10,602 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 20:46:10,602 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 20:46:10,603 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum05.i [2019-11-19 20:46:10,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b90c4ad7/313488d314cd4073bfa7bdbb9abbcbcc/FLAG764c6a924 [2019-11-19 20:46:11,119 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 20:46:11,121 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum05.i [2019-11-19 20:46:11,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b90c4ad7/313488d314cd4073bfa7bdbb9abbcbcc/FLAG764c6a924 [2019-11-19 20:46:11,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b90c4ad7/313488d314cd4073bfa7bdbb9abbcbcc [2019-11-19 20:46:11,497 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 20:46:11,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 20:46:11,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 20:46:11,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 20:46:11,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 20:46:11,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:46:11" (1/1) ... [2019-11-19 20:46:11,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62b46fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:11, skipping insertion in model container [2019-11-19 20:46:11,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:46:11" (1/1) ... [2019-11-19 20:46:11,516 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 20:46:11,536 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 20:46:11,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 20:46:11,751 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 20:46:11,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 20:46:11,787 INFO L192 MainTranslator]: Completed translation [2019-11-19 20:46:11,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:11 WrapperNode [2019-11-19 20:46:11,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 20:46:11,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 20:46:11,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 20:46:11,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 20:46:11,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:11" (1/1) ... [2019-11-19 20:46:11,877 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:11" (1/1) ... [2019-11-19 20:46:11,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 20:46:11,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 20:46:11,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 20:46:11,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 20:46:11,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:11" (1/1) ... [2019-11-19 20:46:11,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:11" (1/1) ... [2019-11-19 20:46:11,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:11" (1/1) ... [2019-11-19 20:46:11,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:11" (1/1) ... [2019-11-19 20:46:11,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:11" (1/1) ... [2019-11-19 20:46:11,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:11" (1/1) ... [2019-11-19 20:46:11,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:11" (1/1) ... [2019-11-19 20:46:11,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 20:46:11,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 20:46:11,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 20:46:11,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 20:46:11,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:11" (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 [2019-11-19 20:46:12,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-19 20:46:12,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 20:46:12,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 20:46:12,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-19 20:46:12,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-19 20:46:12,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 20:46:12,398 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 20:46:12,398 INFO L285 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-19 20:46:12,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:46:12 BoogieIcfgContainer [2019-11-19 20:46:12,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 20:46:12,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 20:46:12,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 20:46:12,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 20:46:12,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:46:11" (1/3) ... [2019-11-19 20:46:12,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b30d80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:46:12, skipping insertion in model container [2019-11-19 20:46:12,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:46:11" (2/3) ... [2019-11-19 20:46:12,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b30d80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:46:12, skipping insertion in model container [2019-11-19 20:46:12,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:46:12" (3/3) ... [2019-11-19 20:46:12,409 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2019-11-19 20:46:12,419 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 20:46:12,427 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 20:46:12,439 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 20:46:12,470 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 20:46:12,470 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 20:46:12,470 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 20:46:12,471 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 20:46:12,471 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 20:46:12,471 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 20:46:12,471 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 20:46:12,472 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 20:46:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-11-19 20:46:12,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-19 20:46:12,493 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:12,494 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:12,495 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2019-11-19 20:46:12,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:12,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131218878] [2019-11-19 20:46:12,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 20:46:12,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131218878] [2019-11-19 20:46:12,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:46:12,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 20:46:12,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904120082] [2019-11-19 20:46:12,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 20:46:12,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:12,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 20:46:12,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 20:46:12,719 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-11-19 20:46:12,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:12,750 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2019-11-19 20:46:12,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 20:46:12,753 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-19 20:46:12,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:12,765 INFO L225 Difference]: With dead ends: 56 [2019-11-19 20:46:12,765 INFO L226 Difference]: Without dead ends: 26 [2019-11-19 20:46:12,772 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 [2019-11-19 20:46:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-19 20:46:12,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-19 20:46:12,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 20:46:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-11-19 20:46:12,836 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2019-11-19 20:46:12,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:12,837 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-11-19 20:46:12,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 20:46:12,838 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-11-19 20:46:12,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-19 20:46:12,840 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:12,840 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:12,840 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:12,841 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2019-11-19 20:46:12,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:12,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687434939] [2019-11-19 20:46:12,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:12,884 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:12,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636446933] [2019-11-19 20:46:12,886 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 [2019-11-19 20:46:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:13,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 20:46:13,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 20:46:13,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687434939] [2019-11-19 20:46:13,050 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:13,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636446933] [2019-11-19 20:46:13,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:46:13,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-19 20:46:13,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064488963] [2019-11-19 20:46:13,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 20:46:13,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:13,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 20:46:13,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 20:46:13,056 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 3 states. [2019-11-19 20:46:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:13,085 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2019-11-19 20:46:13,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 20:46:13,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-19 20:46:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:13,088 INFO L225 Difference]: With dead ends: 50 [2019-11-19 20:46:13,090 INFO L226 Difference]: Without dead ends: 28 [2019-11-19 20:46:13,092 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 [2019-11-19 20:46:13,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-19 20:46:13,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-19 20:46:13,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-19 20:46:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-19 20:46:13,101 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2019-11-19 20:46:13,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:13,102 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-19 20:46:13,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 20:46:13,102 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-19 20:46:13,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 20:46:13,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:13,105 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:46:13,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:13,310 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:13,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:13,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2019-11-19 20:46:13,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:13,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251230043] [2019-11-19 20:46:13,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:13,362 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:13,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998271200] [2019-11-19 20:46:13,363 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 [2019-11-19 20:46:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:13,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 20:46:13,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 20:46:13,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251230043] [2019-11-19 20:46:13,475 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:13,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998271200] [2019-11-19 20:46:13,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:46:13,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-19 20:46:13,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711989281] [2019-11-19 20:46:13,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 20:46:13,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:13,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 20:46:13,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 20:46:13,481 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2019-11-19 20:46:13,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:13,556 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2019-11-19 20:46:13,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 20:46:13,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-19 20:46:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:13,558 INFO L225 Difference]: With dead ends: 57 [2019-11-19 20:46:13,559 INFO L226 Difference]: Without dead ends: 36 [2019-11-19 20:46:13,559 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 [2019-11-19 20:46:13,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-19 20:46:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-19 20:46:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-19 20:46:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2019-11-19 20:46:13,568 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2019-11-19 20:46:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:13,568 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2019-11-19 20:46:13,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 20:46:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2019-11-19 20:46:13,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-19 20:46:13,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:13,570 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] [2019-11-19 20:46:13,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:13,774 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:13,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:13,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2019-11-19 20:46:13,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:13,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314794562] [2019-11-19 20:46:13,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:13,791 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:13,791 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250904004] [2019-11-19 20:46:13,792 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 [2019-11-19 20:46:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:13,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 20:46:13,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-19 20:46:13,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314794562] [2019-11-19 20:46:13,870 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:13,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250904004] [2019-11-19 20:46:13,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:46:13,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-19 20:46:13,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249219594] [2019-11-19 20:46:13,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 20:46:13,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:13,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 20:46:13,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 20:46:13,873 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 3 states. [2019-11-19 20:46:13,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:13,990 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2019-11-19 20:46:13,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 20:46:13,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-19 20:46:13,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:13,992 INFO L225 Difference]: With dead ends: 75 [2019-11-19 20:46:13,992 INFO L226 Difference]: Without dead ends: 54 [2019-11-19 20:46:13,993 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 [2019-11-19 20:46:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-19 20:46:14,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2019-11-19 20:46:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-19 20:46:14,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2019-11-19 20:46:14,002 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 28 [2019-11-19 20:46:14,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:14,002 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2019-11-19 20:46:14,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 20:46:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2019-11-19 20:46:14,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-19 20:46:14,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:14,004 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] [2019-11-19 20:46:14,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:14,209 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:14,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:14,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1168464304, now seen corresponding path program 1 times [2019-11-19 20:46:14,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:14,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096768506] [2019-11-19 20:46:14,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-19 20:46:14,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096768506] [2019-11-19 20:46:14,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:46:14,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-19 20:46:14,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138010320] [2019-11-19 20:46:14,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 20:46:14,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:14,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 20:46:14,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 20:46:14,265 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 4 states. [2019-11-19 20:46:14,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:14,366 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2019-11-19 20:46:14,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 20:46:14,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-11-19 20:46:14,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:14,368 INFO L225 Difference]: With dead ends: 85 [2019-11-19 20:46:14,368 INFO L226 Difference]: Without dead ends: 54 [2019-11-19 20:46:14,369 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 [2019-11-19 20:46:14,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-19 20:46:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2019-11-19 20:46:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-19 20:46:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-19 20:46:14,376 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 28 [2019-11-19 20:46:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:14,377 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-19 20:46:14,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 20:46:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-19 20:46:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-19 20:46:14,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:14,379 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] [2019-11-19 20:46:14,379 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:14,380 INFO L82 PathProgramCache]: Analyzing trace with hash -483510003, now seen corresponding path program 1 times [2019-11-19 20:46:14,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:14,381 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918206365] [2019-11-19 20:46:14,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:14,394 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:14,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930217699] [2019-11-19 20:46:14,395 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 [2019-11-19 20:46:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:14,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 20:46:14,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-19 20:46:14,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918206365] [2019-11-19 20:46:14,506 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:14,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930217699] [2019-11-19 20:46:14,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:46:14,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-19 20:46:14,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547676321] [2019-11-19 20:46:14,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 20:46:14,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:14,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 20:46:14,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 20:46:14,515 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2019-11-19 20:46:14,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:14,543 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-11-19 20:46:14,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 20:46:14,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-11-19 20:46:14,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:14,548 INFO L225 Difference]: With dead ends: 54 [2019-11-19 20:46:14,548 INFO L226 Difference]: Without dead ends: 41 [2019-11-19 20:46:14,550 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 [2019-11-19 20:46:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-19 20:46:14,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-19 20:46:14,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-19 20:46:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-19 20:46:14,562 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 37 [2019-11-19 20:46:14,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:14,563 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-19 20:46:14,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 20:46:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-19 20:46:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-19 20:46:14,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:14,566 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] [2019-11-19 20:46:14,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:14,770 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:14,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:14,771 INFO L82 PathProgramCache]: Analyzing trace with hash -623311861, now seen corresponding path program 1 times [2019-11-19 20:46:14,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:14,772 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101936133] [2019-11-19 20:46:14,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:14,784 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:14,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990223409] [2019-11-19 20:46:14,785 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 [2019-11-19 20:46:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:14,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 20:46:14,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-19 20:46:14,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101936133] [2019-11-19 20:46:14,866 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:14,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990223409] [2019-11-19 20:46:14,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:14,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-19 20:46:14,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340742826] [2019-11-19 20:46:14,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 20:46:14,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:14,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 20:46:14,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 20:46:14,869 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 4 states. [2019-11-19 20:46:14,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:14,885 INFO L93 Difference]: Finished difference Result 78 states and 98 transitions. [2019-11-19 20:46:14,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 20:46:14,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-11-19 20:46:14,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:14,887 INFO L225 Difference]: With dead ends: 78 [2019-11-19 20:46:14,887 INFO L226 Difference]: Without dead ends: 43 [2019-11-19 20:46:14,888 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 [2019-11-19 20:46:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-19 20:46:14,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-19 20:46:14,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-19 20:46:14,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-11-19 20:46:14,893 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 39 [2019-11-19 20:46:14,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:14,894 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-11-19 20:46:14,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 20:46:14,894 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-11-19 20:46:14,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-19 20:46:14,896 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:14,896 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] [2019-11-19 20:46:15,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:15,104 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:15,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:15,105 INFO L82 PathProgramCache]: Analyzing trace with hash -526389047, now seen corresponding path program 2 times [2019-11-19 20:46:15,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:15,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327633844] [2019-11-19 20:46:15,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:15,121 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:15,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183084682] [2019-11-19 20:46:15,122 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 [2019-11-19 20:46:15,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 20:46:15,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 20:46:15,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 20:46:15,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-19 20:46:15,216 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327633844] [2019-11-19 20:46:15,217 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:15,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183084682] [2019-11-19 20:46:15,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:15,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-19 20:46:15,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766148669] [2019-11-19 20:46:15,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 20:46:15,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:15,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 20:46:15,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 20:46:15,220 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 4 states. [2019-11-19 20:46:15,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:15,279 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2019-11-19 20:46:15,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 20:46:15,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2019-11-19 20:46:15,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:15,280 INFO L225 Difference]: With dead ends: 86 [2019-11-19 20:46:15,280 INFO L226 Difference]: Without dead ends: 54 [2019-11-19 20:46:15,281 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 [2019-11-19 20:46:15,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-19 20:46:15,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-11-19 20:46:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-19 20:46:15,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-11-19 20:46:15,288 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2019-11-19 20:46:15,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:15,289 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-11-19 20:46:15,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 20:46:15,289 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-11-19 20:46:15,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-19 20:46:15,291 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:15,291 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] [2019-11-19 20:46:15,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:15,495 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:15,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:15,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1393104750, now seen corresponding path program 3 times [2019-11-19 20:46:15,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:15,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345750574] [2019-11-19 20:46:15,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:15,512 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:15,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682412667] [2019-11-19 20:46:15,513 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 [2019-11-19 20:46:15,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-19 20:46:15,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 20:46:15,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 20:46:15,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-19 20:46:15,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345750574] [2019-11-19 20:46:15,625 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:15,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682412667] [2019-11-19 20:46:15,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:15,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-19 20:46:15,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071680799] [2019-11-19 20:46:15,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 20:46:15,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:15,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 20:46:15,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 20:46:15,628 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 4 states. [2019-11-19 20:46:15,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:15,649 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2019-11-19 20:46:15,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 20:46:15,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2019-11-19 20:46:15,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:15,651 INFO L225 Difference]: With dead ends: 70 [2019-11-19 20:46:15,651 INFO L226 Difference]: Without dead ends: 54 [2019-11-19 20:46:15,652 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 [2019-11-19 20:46:15,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-19 20:46:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-19 20:46:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-19 20:46:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2019-11-19 20:46:15,659 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 50 [2019-11-19 20:46:15,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:15,659 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2019-11-19 20:46:15,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 20:46:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2019-11-19 20:46:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-19 20:46:15,661 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:15,661 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] [2019-11-19 20:46:15,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:15,866 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:15,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1656359148, now seen corresponding path program 4 times [2019-11-19 20:46:15,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:15,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612187941] [2019-11-19 20:46:15,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:15,883 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:15,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072395635] [2019-11-19 20:46:15,884 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 [2019-11-19 20:46:15,935 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 20:46:15,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 20:46:15,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 20:46:15,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-19 20:46:15,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612187941] [2019-11-19 20:46:15,976 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:15,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072395635] [2019-11-19 20:46:15,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:15,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-19 20:46:15,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972261935] [2019-11-19 20:46:15,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 20:46:15,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:15,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 20:46:15,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-19 20:46:15,978 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 5 states. [2019-11-19 20:46:16,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:16,057 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2019-11-19 20:46:16,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 20:46:16,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-11-19 20:46:16,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:16,058 INFO L225 Difference]: With dead ends: 102 [2019-11-19 20:46:16,059 INFO L226 Difference]: Without dead ends: 62 [2019-11-19 20:46:16,059 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 [2019-11-19 20:46:16,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-19 20:46:16,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-19 20:46:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-19 20:46:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2019-11-19 20:46:16,067 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 52 [2019-11-19 20:46:16,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:16,068 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2019-11-19 20:46:16,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 20:46:16,068 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2019-11-19 20:46:16,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-19 20:46:16,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:16,069 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] [2019-11-19 20:46:16,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:16,273 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:16,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:16,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2133276057, now seen corresponding path program 5 times [2019-11-19 20:46:16,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:16,274 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434074625] [2019-11-19 20:46:16,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:16,291 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:16,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406245498] [2019-11-19 20:46:16,295 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 [2019-11-19 20:46:16,363 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-19 20:46:16,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 20:46:16,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 20:46:16,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-19 20:46:16,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434074625] [2019-11-19 20:46:16,399 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:16,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406245498] [2019-11-19 20:46:16,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:46:16,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-19 20:46:16,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002483228] [2019-11-19 20:46:16,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 20:46:16,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:16,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 20:46:16,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 20:46:16,403 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 4 states. [2019-11-19 20:46:16,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:16,449 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2019-11-19 20:46:16,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 20:46:16,451 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-11-19 20:46:16,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:16,451 INFO L225 Difference]: With dead ends: 111 [2019-11-19 20:46:16,452 INFO L226 Difference]: Without dead ends: 71 [2019-11-19 20:46:16,452 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 [2019-11-19 20:46:16,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-19 20:46:16,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2019-11-19 20:46:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-19 20:46:16,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2019-11-19 20:46:16,462 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 61 [2019-11-19 20:46:16,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:16,463 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2019-11-19 20:46:16,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 20:46:16,463 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2019-11-19 20:46:16,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-19 20:46:16,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:16,464 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] [2019-11-19 20:46:16,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:16,665 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:16,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:16,666 INFO L82 PathProgramCache]: Analyzing trace with hash 2021142629, now seen corresponding path program 1 times [2019-11-19 20:46:16,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:16,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843228692] [2019-11-19 20:46:16,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:16,689 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:16,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66990945] [2019-11-19 20:46:16,691 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 [2019-11-19 20:46:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:46:16,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 20:46:16,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-19 20:46:16,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843228692] [2019-11-19 20:46:16,801 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:16,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66990945] [2019-11-19 20:46:16,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:16,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-19 20:46:16,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857647839] [2019-11-19 20:46:16,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 20:46:16,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:16,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 20:46:16,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-19 20:46:16,803 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 5 states. [2019-11-19 20:46:16,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:16,835 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2019-11-19 20:46:16,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 20:46:16,836 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-11-19 20:46:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:16,837 INFO L225 Difference]: With dead ends: 120 [2019-11-19 20:46:16,837 INFO L226 Difference]: Without dead ends: 65 [2019-11-19 20:46:16,837 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 [2019-11-19 20:46:16,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-19 20:46:16,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-19 20:46:16,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-19 20:46:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2019-11-19 20:46:16,843 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 61 [2019-11-19 20:46:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:16,844 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2019-11-19 20:46:16,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 20:46:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2019-11-19 20:46:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-19 20:46:16,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:16,845 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] [2019-11-19 20:46:17,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:17,050 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:17,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:17,050 INFO L82 PathProgramCache]: Analyzing trace with hash 265673379, now seen corresponding path program 2 times [2019-11-19 20:46:17,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:17,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577581152] [2019-11-19 20:46:17,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:17,066 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:17,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894839500] [2019-11-19 20:46:17,067 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 [2019-11-19 20:46:17,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 20:46:17,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 20:46:17,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 20:46:17,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-19 20:46:17,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577581152] [2019-11-19 20:46:17,179 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:17,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894839500] [2019-11-19 20:46:17,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:17,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-19 20:46:17,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642152530] [2019-11-19 20:46:17,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 20:46:17,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:17,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 20:46:17,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-19 20:46:17,181 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 6 states. [2019-11-19 20:46:17,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:17,206 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2019-11-19 20:46:17,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 20:46:17,206 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2019-11-19 20:46:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:17,207 INFO L225 Difference]: With dead ends: 122 [2019-11-19 20:46:17,207 INFO L226 Difference]: Without dead ends: 67 [2019-11-19 20:46:17,208 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 [2019-11-19 20:46:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-19 20:46:17,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-19 20:46:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-19 20:46:17,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2019-11-19 20:46:17,213 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 63 [2019-11-19 20:46:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:17,214 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2019-11-19 20:46:17,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 20:46:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2019-11-19 20:46:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-19 20:46:17,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:17,215 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] [2019-11-19 20:46:17,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:17,416 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:17,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1181871457, now seen corresponding path program 3 times [2019-11-19 20:46:17,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:17,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053065036] [2019-11-19 20:46:17,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:17,429 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:17,430 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291378158] [2019-11-19 20:46:17,430 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 [2019-11-19 20:46:17,496 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-19 20:46:17,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 20:46:17,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 20:46:17,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-11-19 20:46:17,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053065036] [2019-11-19 20:46:17,517 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:17,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291378158] [2019-11-19 20:46:17,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:17,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-19 20:46:17,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881343937] [2019-11-19 20:46:17,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 20:46:17,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:17,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 20:46:17,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-19 20:46:17,518 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 5 states. [2019-11-19 20:46:17,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:17,540 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2019-11-19 20:46:17,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 20:46:17,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2019-11-19 20:46:17,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:17,541 INFO L225 Difference]: With dead ends: 88 [2019-11-19 20:46:17,541 INFO L226 Difference]: Without dead ends: 69 [2019-11-19 20:46:17,542 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 [2019-11-19 20:46:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-19 20:46:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-11-19 20:46:17,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-19 20:46:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2019-11-19 20:46:17,547 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 65 [2019-11-19 20:46:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:17,548 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2019-11-19 20:46:17,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 20:46:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2019-11-19 20:46:17,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-19 20:46:17,549 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:17,549 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] [2019-11-19 20:46:17,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:17,750 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:17,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:17,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1302328097, now seen corresponding path program 4 times [2019-11-19 20:46:17,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:17,751 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496959405] [2019-11-19 20:46:17,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:17,762 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:17,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778646311] [2019-11-19 20:46:17,763 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 [2019-11-19 20:46:17,813 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 20:46:17,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 20:46:17,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 20:46:17,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-19 20:46:17,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496959405] [2019-11-19 20:46:17,859 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:17,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778646311] [2019-11-19 20:46:17,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:17,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-19 20:46:17,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615456681] [2019-11-19 20:46:17,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 20:46:17,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:17,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 20:46:17,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-19 20:46:17,864 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 7 states. [2019-11-19 20:46:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:17,967 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2019-11-19 20:46:17,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 20:46:17,967 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2019-11-19 20:46:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:17,968 INFO L225 Difference]: With dead ends: 120 [2019-11-19 20:46:17,968 INFO L226 Difference]: Without dead ends: 77 [2019-11-19 20:46:17,969 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 [2019-11-19 20:46:17,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-19 20:46:17,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-11-19 20:46:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-19 20:46:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-11-19 20:46:17,975 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 67 [2019-11-19 20:46:17,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:17,976 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-11-19 20:46:17,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 20:46:17,976 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-11-19 20:46:17,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-19 20:46:17,977 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:17,977 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] [2019-11-19 20:46:18,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:18,178 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:18,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:18,178 INFO L82 PathProgramCache]: Analyzing trace with hash -153484414, now seen corresponding path program 5 times [2019-11-19 20:46:18,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:18,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356150240] [2019-11-19 20:46:18,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:18,191 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:18,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699550215] [2019-11-19 20:46:18,192 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 [2019-11-19 20:46:18,285 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-19 20:46:18,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 20:46:18,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 20:46:18,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-11-19 20:46:18,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356150240] [2019-11-19 20:46:18,317 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:18,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699550215] [2019-11-19 20:46:18,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:18,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-19 20:46:18,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410887349] [2019-11-19 20:46:18,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 20:46:18,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:18,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 20:46:18,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-19 20:46:18,319 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 7 states. [2019-11-19 20:46:18,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:18,350 INFO L93 Difference]: Finished difference Result 145 states and 165 transitions. [2019-11-19 20:46:18,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 20:46:18,350 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2019-11-19 20:46:18,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:18,351 INFO L225 Difference]: With dead ends: 145 [2019-11-19 20:46:18,351 INFO L226 Difference]: Without dead ends: 79 [2019-11-19 20:46:18,352 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 [2019-11-19 20:46:18,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-19 20:46:18,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-11-19 20:46:18,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-19 20:46:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2019-11-19 20:46:18,358 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 76 [2019-11-19 20:46:18,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:18,358 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2019-11-19 20:46:18,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 20:46:18,359 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2019-11-19 20:46:18,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-19 20:46:18,360 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:18,360 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] [2019-11-19 20:46:18,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:18,564 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:18,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1735993980, now seen corresponding path program 6 times [2019-11-19 20:46:18,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:18,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174709927] [2019-11-19 20:46:18,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:18,580 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:18,580 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828044540] [2019-11-19 20:46:18,580 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 [2019-11-19 20:46:38,635 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-19 20:46:38,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 20:46:38,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 20:46:38,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:46:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2019-11-19 20:46:38,671 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174709927] [2019-11-19 20:46:38,672 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:46:38,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828044540] [2019-11-19 20:46:38,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:46:38,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-19 20:46:38,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063083108] [2019-11-19 20:46:38,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 20:46:38,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:46:38,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 20:46:38,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-19 20:46:38,674 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 6 states. [2019-11-19 20:46:38,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:46:38,707 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2019-11-19 20:46:38,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 20:46:38,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2019-11-19 20:46:38,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:46:38,708 INFO L225 Difference]: With dead ends: 103 [2019-11-19 20:46:38,708 INFO L226 Difference]: Without dead ends: 81 [2019-11-19 20:46:38,708 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 [2019-11-19 20:46:38,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-19 20:46:38,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-19 20:46:38,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-19 20:46:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2019-11-19 20:46:38,712 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 78 [2019-11-19 20:46:38,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:46:38,713 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2019-11-19 20:46:38,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 20:46:38,713 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2019-11-19 20:46:38,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-19 20:46:38,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:46:38,714 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] [2019-11-19 20:46:38,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:38,924 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:46:38,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:46:38,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1345801862, now seen corresponding path program 7 times [2019-11-19 20:46:38,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:46:38,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862496493] [2019-11-19 20:46:38,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:46:38,946 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:46:38,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642612568] [2019-11-19 20:46:38,946 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 [2019-11-19 20:46:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 20:46:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 20:46:39,380 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 20:46:39,381 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 20:46:39,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:46:39,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:46:39 BoogieIcfgContainer [2019-11-19 20:46:39,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 20:46:39,672 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 20:46:39,672 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 20:46:39,672 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 20:46:39,675 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:46:12" (3/4) ... [2019-11-19 20:46:39,677 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 20:46:39,797 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 20:46:39,798 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 20:46:39,800 INFO L168 Benchmark]: Toolchain (without parser) took 28301.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 203.4 MB). Free memory was 952.3 MB in the beginning and 967.3 MB in the end (delta: -15.0 MB). Peak memory consumption was 188.4 MB. Max. memory is 11.5 GB. [2019-11-19 20:46:39,801 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 20:46:39,801 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.89 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-19 20:46:39,802 INFO L168 Benchmark]: Boogie Procedure Inliner took 122.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -188.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-19 20:46:39,802 INFO L168 Benchmark]: Boogie Preprocessor took 37.99 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 20:46:39,803 INFO L168 Benchmark]: RCFGBuilder took 450.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 11.5 GB. [2019-11-19 20:46:39,803 INFO L168 Benchmark]: TraceAbstraction took 27269.92 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 63.4 MB). Free memory was 1.1 GB in the beginning and 974.4 MB in the end (delta: 129.5 MB). Peak memory consumption was 193.0 MB. Max. memory is 11.5 GB. [2019-11-19 20:46:39,804 INFO L168 Benchmark]: Witness Printer took 126.38 ms. Allocated memory is still 1.2 GB. Free memory was 974.4 MB in the beginning and 967.3 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. [2019-11-19 20:46:39,806 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 288.89 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 122.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -188.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 37.99 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 450.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 27269.92 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 63.4 MB). Free memory was 1.1 GB in the beginning and 974.4 MB in the end (delta: 129.5 MB). Peak memory consumption was 193.0 MB. Max. memory is 11.5 GB. * Witness Printer took 126.38 ms. Allocated memory is still 1.2 GB. Free memory was 974.4 MB in the beginning and 967.3 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 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: 0.9s, 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: 0.2s SsaConstructionTime, 20.6s 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...