./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/rangesum.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 279fae57395782089eff32ec1396d1726d808c7f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 15:22:24,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 15:22:24,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 15:22:24,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 15:22:24,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 15:22:24,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 15:22:24,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 15:22:24,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 15:22:24,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 15:22:24,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 15:22:24,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 15:22:24,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 15:22:24,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 15:22:24,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 15:22:24,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 15:22:24,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 15:22:24,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 15:22:24,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 15:22:24,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 15:22:24,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 15:22:24,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 15:22:24,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 15:22:24,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 15:22:24,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 15:22:24,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 15:22:24,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 15:22:24,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 15:22:24,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 15:22:24,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 15:22:24,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 15:22:24,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 15:22:24,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 15:22:24,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 15:22:24,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 15:22:24,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 15:22:24,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 15:22:24,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 15:22:24,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 15:22:24,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 15:22:24,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 15:22:24,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 15:22:24,266 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 15:22:24,293 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 15:22:24,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 15:22:24,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 15:22:24,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 15:22:24,299 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 15:22:24,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 15:22:24,300 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 15:22:24,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 15:22:24,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 15:22:24,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 15:22:24,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 15:22:24,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 15:22:24,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 15:22:24,304 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 15:22:24,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 15:22:24,304 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 15:22:24,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 15:22:24,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 15:22:24,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 15:22:24,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 15:22:24,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 15:22:24,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 15:22:24,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 15:22:24,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 15:22:24,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 15:22:24,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 15:22:24,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 15:22:24,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 15:22:24,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 15:22:24,310 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 -> 279fae57395782089eff32ec1396d1726d808c7f [2019-11-28 15:22:24,588 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 15:22:24,601 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 15:22:24,604 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 15:22:24,606 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 15:22:24,607 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 15:22:24,607 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum.i [2019-11-28 15:22:24,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e52733f2/6aa21577b00347328b807100d4415b5a/FLAG15e91ae5c [2019-11-28 15:22:25,128 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 15:22:25,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum.i [2019-11-28 15:22:25,135 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e52733f2/6aa21577b00347328b807100d4415b5a/FLAG15e91ae5c [2019-11-28 15:22:25,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e52733f2/6aa21577b00347328b807100d4415b5a [2019-11-28 15:22:25,504 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 15:22:25,506 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 15:22:25,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 15:22:25,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 15:22:25,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 15:22:25,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:22:25" (1/1) ... [2019-11-28 15:22:25,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a770ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:25, skipping insertion in model container [2019-11-28 15:22:25,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:22:25" (1/1) ... [2019-11-28 15:22:25,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 15:22:25,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 15:22:25,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:22:25,744 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 15:22:25,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:22:25,784 INFO L208 MainTranslator]: Completed translation [2019-11-28 15:22:25,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:25 WrapperNode [2019-11-28 15:22:25,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 15:22:25,786 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 15:22:25,786 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 15:22:25,786 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 15:22:25,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:25" (1/1) ... [2019-11-28 15:22:25,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:25" (1/1) ... [2019-11-28 15:22:25,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 15:22:25,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 15:22:25,889 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 15:22:25,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 15:22:25,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:25" (1/1) ... [2019-11-28 15:22:25,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:25" (1/1) ... [2019-11-28 15:22:25,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:25" (1/1) ... [2019-11-28 15:22:25,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:25" (1/1) ... [2019-11-28 15:22:25,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:25" (1/1) ... [2019-11-28 15:22:25,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:25" (1/1) ... [2019-11-28 15:22:25,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:25" (1/1) ... [2019-11-28 15:22:25,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 15:22:25,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 15:22:25,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 15:22:25,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 15:22:25,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 15:22:25,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 15:22:25,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 15:22:25,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 15:22:25,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 15:22:25,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 15:22:25,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 15:22:26,350 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 15:22:26,351 INFO L287 CfgBuilder]: Removed 17 assume(true) statements. [2019-11-28 15:22:26,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:22:26 BoogieIcfgContainer [2019-11-28 15:22:26,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 15:22:26,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 15:22:26,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 15:22:26,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 15:22:26,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:22:25" (1/3) ... [2019-11-28 15:22:26,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eba343d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:22:26, skipping insertion in model container [2019-11-28 15:22:26,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:22:25" (2/3) ... [2019-11-28 15:22:26,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eba343d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:22:26, skipping insertion in model container [2019-11-28 15:22:26,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:22:26" (3/3) ... [2019-11-28 15:22:26,361 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum.i [2019-11-28 15:22:26,371 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 15:22:26,377 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 15:22:26,387 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 15:22:26,408 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 15:22:26,408 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 15:22:26,408 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 15:22:26,408 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 15:22:26,408 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 15:22:26,408 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 15:22:26,409 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 15:22:26,409 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 15:22:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-28 15:22:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 15:22:26,427 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:26,428 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:26,429 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:26,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:26,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1829542603, now seen corresponding path program 1 times [2019-11-28 15:22:26,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:26,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785428558] [2019-11-28 15:22:26,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:22:26,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785428558] [2019-11-28 15:22:26,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:22:26,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 15:22:26,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250043917] [2019-11-28 15:22:26,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 15:22:26,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:26,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 15:22:26,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 15:22:26,591 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-28 15:22:26,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:26,607 INFO L93 Difference]: Finished difference Result 59 states and 90 transitions. [2019-11-28 15:22:26,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 15:22:26,609 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2019-11-28 15:22:26,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:26,617 INFO L225 Difference]: With dead ends: 59 [2019-11-28 15:22:26,617 INFO L226 Difference]: Without dead ends: 27 [2019-11-28 15:22:26,621 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 15:22:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-28 15:22:26,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-28 15:22:26,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-28 15:22:26,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2019-11-28 15:22:26,657 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2019-11-28 15:22:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:26,657 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2019-11-28 15:22:26,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 15:22:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2019-11-28 15:22:26,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 15:22:26,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:26,659 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:26,660 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:26,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:26,660 INFO L82 PathProgramCache]: Analyzing trace with hash -97699309, now seen corresponding path program 1 times [2019-11-28 15:22:26,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:26,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111471385] [2019-11-28 15:22:26,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:26,679 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:26,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826696422] [2019-11-28 15:22:26,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:26,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 15:22:26,785 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:22:26,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111471385] [2019-11-28 15:22:26,805 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:26,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826696422] [2019-11-28 15:22:26,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:22:26,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 15:22:26,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992374466] [2019-11-28 15:22:26,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 15:22:26,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:26,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 15:22:26,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:22:26,810 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2019-11-28 15:22:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:26,883 INFO L93 Difference]: Finished difference Result 65 states and 90 transitions. [2019-11-28 15:22:26,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 15:22:26,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-28 15:22:26,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:26,885 INFO L225 Difference]: With dead ends: 65 [2019-11-28 15:22:26,885 INFO L226 Difference]: Without dead ends: 48 [2019-11-28 15:22:26,886 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:22:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-28 15:22:26,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2019-11-28 15:22:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-28 15:22:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2019-11-28 15:22:26,895 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 18 [2019-11-28 15:22:26,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:26,896 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2019-11-28 15:22:26,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 15:22:26,896 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2019-11-28 15:22:26,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 15:22:26,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:26,898 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:27,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:27,099 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:27,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:27,100 INFO L82 PathProgramCache]: Analyzing trace with hash 840584081, now seen corresponding path program 1 times [2019-11-28 15:22:27,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:27,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108023825] [2019-11-28 15:22:27,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:22:27,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108023825] [2019-11-28 15:22:27,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:22:27,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-28 15:22:27,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810687216] [2019-11-28 15:22:27,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 15:22:27,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:27,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 15:22:27,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-28 15:22:27,328 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand 8 states. [2019-11-28 15:22:27,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:27,413 INFO L93 Difference]: Finished difference Result 96 states and 125 transitions. [2019-11-28 15:22:27,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 15:22:27,414 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-28 15:22:27,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:27,416 INFO L225 Difference]: With dead ends: 96 [2019-11-28 15:22:27,416 INFO L226 Difference]: Without dead ends: 91 [2019-11-28 15:22:27,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-28 15:22:27,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-28 15:22:27,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2019-11-28 15:22:27,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-28 15:22:27,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2019-11-28 15:22:27,433 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 18 [2019-11-28 15:22:27,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:27,433 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2019-11-28 15:22:27,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 15:22:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2019-11-28 15:22:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 15:22:27,435 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:27,435 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] [2019-11-28 15:22:27,435 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:27,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:27,436 INFO L82 PathProgramCache]: Analyzing trace with hash -995174774, now seen corresponding path program 1 times [2019-11-28 15:22:27,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:27,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628322889] [2019-11-28 15:22:27,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:27,468 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:27,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568842965] [2019-11-28 15:22:27,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:27,540 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 15:22:27,542 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 15:22:27,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628322889] [2019-11-28 15:22:27,563 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:27,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568842965] [2019-11-28 15:22:27,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:22:27,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 15:22:27,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355863150] [2019-11-28 15:22:27,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 15:22:27,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:27,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 15:22:27,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:22:27,567 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 3 states. [2019-11-28 15:22:27,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:27,617 INFO L93 Difference]: Finished difference Result 115 states and 165 transitions. [2019-11-28 15:22:27,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 15:22:27,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-28 15:22:27,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:27,621 INFO L225 Difference]: With dead ends: 115 [2019-11-28 15:22:27,621 INFO L226 Difference]: Without dead ends: 61 [2019-11-28 15:22:27,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:22:27,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-28 15:22:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-11-28 15:22:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-28 15:22:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2019-11-28 15:22:27,632 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 21 [2019-11-28 15:22:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:27,633 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2019-11-28 15:22:27,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 15:22:27,633 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2019-11-28 15:22:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-28 15:22:27,635 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:27,635 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] [2019-11-28 15:22:27,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:27,848 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:27,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2100366548, now seen corresponding path program 1 times [2019-11-28 15:22:27,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:27,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711302063] [2019-11-28 15:22:27,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:27,895 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:27,895 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516452560] [2019-11-28 15:22:27,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:27,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 15:22:27,963 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 15:22:27,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711302063] [2019-11-28 15:22:27,995 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:27,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516452560] [2019-11-28 15:22:27,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:27,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-28 15:22:27,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449721698] [2019-11-28 15:22:27,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 15:22:27,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:27,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 15:22:27,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:27,997 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand 4 states. [2019-11-28 15:22:28,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:28,064 INFO L93 Difference]: Finished difference Result 117 states and 167 transitions. [2019-11-28 15:22:28,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 15:22:28,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-28 15:22:28,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:28,066 INFO L225 Difference]: With dead ends: 117 [2019-11-28 15:22:28,066 INFO L226 Difference]: Without dead ends: 63 [2019-11-28 15:22:28,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:28,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-28 15:22:28,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-11-28 15:22:28,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-28 15:22:28,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2019-11-28 15:22:28,074 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 23 [2019-11-28 15:22:28,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:28,075 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2019-11-28 15:22:28,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 15:22:28,075 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2019-11-28 15:22:28,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-28 15:22:28,077 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:28,077 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:28,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:28,281 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:28,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:28,282 INFO L82 PathProgramCache]: Analyzing trace with hash 962228046, now seen corresponding path program 2 times [2019-11-28 15:22:28,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:28,283 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945203336] [2019-11-28 15:22:28,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:28,300 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:28,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703800765] [2019-11-28 15:22:28,301 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:28,350 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-28 15:22:28,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:22:28,352 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 15:22:28,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 15:22:28,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945203336] [2019-11-28 15:22:28,378 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:28,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703800765] [2019-11-28 15:22:28,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:22:28,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 15:22:28,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368222630] [2019-11-28 15:22:28,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 15:22:28,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:28,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 15:22:28,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:28,387 INFO L87 Difference]: Start difference. First operand 62 states and 87 transitions. Second operand 4 states. [2019-11-28 15:22:28,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:28,488 INFO L93 Difference]: Finished difference Result 127 states and 183 transitions. [2019-11-28 15:22:28,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 15:22:28,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-28 15:22:28,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:28,490 INFO L225 Difference]: With dead ends: 127 [2019-11-28 15:22:28,490 INFO L226 Difference]: Without dead ends: 77 [2019-11-28 15:22:28,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:28,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-28 15:22:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2019-11-28 15:22:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-28 15:22:28,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2019-11-28 15:22:28,509 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 25 [2019-11-28 15:22:28,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:28,509 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2019-11-28 15:22:28,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 15:22:28,509 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2019-11-28 15:22:28,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-28 15:22:28,510 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:28,511 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-28 15:22:28,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:28,719 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:28,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:28,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1979262774, now seen corresponding path program 1 times [2019-11-28 15:22:28,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:28,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022672522] [2019-11-28 15:22:28,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:28,754 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:28,755 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561398687] [2019-11-28 15:22:28,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:28,832 INFO L264 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 15:22:28,836 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-28 15:22:28,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022672522] [2019-11-28 15:22:28,866 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:28,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561398687] [2019-11-28 15:22:28,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:28,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-28 15:22:28,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759134355] [2019-11-28 15:22:28,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 15:22:28,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:28,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 15:22:28,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-28 15:22:28,869 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand 5 states. [2019-11-28 15:22:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:28,981 INFO L93 Difference]: Finished difference Result 150 states and 206 transitions. [2019-11-28 15:22:28,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 15:22:28,982 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2019-11-28 15:22:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:28,983 INFO L225 Difference]: With dead ends: 150 [2019-11-28 15:22:28,983 INFO L226 Difference]: Without dead ends: 92 [2019-11-28 15:22:28,985 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-28 15:22:28,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-28 15:22:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2019-11-28 15:22:29,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-28 15:22:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2019-11-28 15:22:29,001 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 34 [2019-11-28 15:22:29,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:29,002 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2019-11-28 15:22:29,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 15:22:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2019-11-28 15:22:29,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-28 15:22:29,006 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:29,006 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2019-11-28 15:22:29,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:29,211 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:29,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:29,211 INFO L82 PathProgramCache]: Analyzing trace with hash -387145522, now seen corresponding path program 2 times [2019-11-28 15:22:29,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:29,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696476736] [2019-11-28 15:22:29,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:29,240 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:29,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893767468] [2019-11-28 15:22:29,241 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:29,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-28 15:22:29,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:22:29,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 15:22:29,304 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 15:22:29,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696476736] [2019-11-28 15:22:29,335 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:29,336 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893767468] [2019-11-28 15:22:29,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:22:29,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 15:22:29,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070778942] [2019-11-28 15:22:29,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 15:22:29,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:29,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 15:22:29,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:29,339 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand 4 states. [2019-11-28 15:22:29,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:29,393 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2019-11-28 15:22:29,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 15:22:29,394 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-11-28 15:22:29,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:29,395 INFO L225 Difference]: With dead ends: 122 [2019-11-28 15:22:29,395 INFO L226 Difference]: Without dead ends: 91 [2019-11-28 15:22:29,396 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 15:22:29,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-28 15:22:29,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-11-28 15:22:29,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-28 15:22:29,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2019-11-28 15:22:29,417 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 43 [2019-11-28 15:22:29,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:29,417 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2019-11-28 15:22:29,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 15:22:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2019-11-28 15:22:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-28 15:22:29,423 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:29,423 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2019-11-28 15:22:29,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:29,628 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:29,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:29,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1297182544, now seen corresponding path program 1 times [2019-11-28 15:22:29,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:29,629 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725502335] [2019-11-28 15:22:29,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:29,661 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:29,662 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757467650] [2019-11-28 15:22:29,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:29,727 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 15:22:29,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-28 15:22:29,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725502335] [2019-11-28 15:22:29,795 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:29,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757467650] [2019-11-28 15:22:29,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:29,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-28 15:22:29,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123861703] [2019-11-28 15:22:29,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 15:22:29,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:29,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 15:22:29,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-28 15:22:29,798 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 9 states. [2019-11-28 15:22:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:29,988 INFO L93 Difference]: Finished difference Result 197 states and 250 transitions. [2019-11-28 15:22:29,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 15:22:29,989 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-11-28 15:22:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:29,991 INFO L225 Difference]: With dead ends: 197 [2019-11-28 15:22:29,991 INFO L226 Difference]: Without dead ends: 92 [2019-11-28 15:22:29,992 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-28 15:22:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-28 15:22:29,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-28 15:22:29,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-28 15:22:30,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2019-11-28 15:22:30,000 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 45 [2019-11-28 15:22:30,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:30,000 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2019-11-28 15:22:30,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 15:22:30,001 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2019-11-28 15:22:30,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-28 15:22:30,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:30,003 INFO L410 BasicCegarLoop]: trace histogram [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, 1] [2019-11-28 15:22:30,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:30,212 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:30,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:30,213 INFO L82 PathProgramCache]: Analyzing trace with hash -3446958, now seen corresponding path program 2 times [2019-11-28 15:22:30,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:30,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337961746] [2019-11-28 15:22:30,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:30,231 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:30,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153966177] [2019-11-28 15:22:30,232 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:30,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 15:22:30,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:22:30,326 INFO L264 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 15:22:30,328 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-28 15:22:30,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337961746] [2019-11-28 15:22:30,386 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:30,386 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153966177] [2019-11-28 15:22:30,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:30,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-28 15:22:30,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993257487] [2019-11-28 15:22:30,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 15:22:30,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:30,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 15:22:30,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-28 15:22:30,388 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 9 states. [2019-11-28 15:22:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:30,566 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2019-11-28 15:22:30,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 15:22:30,567 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-11-28 15:22:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:30,568 INFO L225 Difference]: With dead ends: 171 [2019-11-28 15:22:30,568 INFO L226 Difference]: Without dead ends: 116 [2019-11-28 15:22:30,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-11-28 15:22:30,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-28 15:22:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2019-11-28 15:22:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-28 15:22:30,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2019-11-28 15:22:30,586 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 47 [2019-11-28 15:22:30,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:30,586 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2019-11-28 15:22:30,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 15:22:30,586 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2019-11-28 15:22:30,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-28 15:22:30,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:30,588 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:22:30,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:30,793 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:30,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:30,794 INFO L82 PathProgramCache]: Analyzing trace with hash -384159915, now seen corresponding path program 1 times [2019-11-28 15:22:30,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:30,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238807025] [2019-11-28 15:22:30,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:30,808 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:30,811 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616754138] [2019-11-28 15:22:30,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:22:30,864 INFO L264 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 15:22:30,867 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-28 15:22:30,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238807025] [2019-11-28 15:22:30,923 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:30,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616754138] [2019-11-28 15:22:30,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:30,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-28 15:22:30,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011525767] [2019-11-28 15:22:30,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 15:22:30,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:30,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 15:22:30,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-28 15:22:30,925 INFO L87 Difference]: Start difference. First operand 99 states and 124 transitions. Second operand 8 states. [2019-11-28 15:22:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:31,014 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2019-11-28 15:22:31,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 15:22:31,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2019-11-28 15:22:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:31,017 INFO L225 Difference]: With dead ends: 138 [2019-11-28 15:22:31,017 INFO L226 Difference]: Without dead ends: 105 [2019-11-28 15:22:31,017 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2019-11-28 15:22:31,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-28 15:22:31,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-11-28 15:22:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-28 15:22:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2019-11-28 15:22:31,024 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 53 [2019-11-28 15:22:31,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:31,024 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2019-11-28 15:22:31,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 15:22:31,025 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2019-11-28 15:22:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-28 15:22:31,025 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:31,025 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1] [2019-11-28 15:22:31,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:31,229 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:31,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1685231241, now seen corresponding path program 2 times [2019-11-28 15:22:31,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:31,230 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44023169] [2019-11-28 15:22:31,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:31,244 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:31,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826450583] [2019-11-28 15:22:31,245 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:31,311 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 15:22:31,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:22:31,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 15:22:31,320 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:22:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-28 15:22:31,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44023169] [2019-11-28 15:22:31,427 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:22:31,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826450583] [2019-11-28 15:22:31,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:22:31,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-28 15:22:31,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021054368] [2019-11-28 15:22:31,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 15:22:31,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:22:31,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 15:22:31,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-28 15:22:31,429 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand 10 states. [2019-11-28 15:22:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:22:31,659 INFO L93 Difference]: Finished difference Result 272 states and 342 transitions. [2019-11-28 15:22:31,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 15:22:31,659 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2019-11-28 15:22:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:22:31,661 INFO L225 Difference]: With dead ends: 272 [2019-11-28 15:22:31,661 INFO L226 Difference]: Without dead ends: 187 [2019-11-28 15:22:31,662 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-28 15:22:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-28 15:22:31,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 175. [2019-11-28 15:22:31,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-28 15:22:31,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2019-11-28 15:22:31,673 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 55 [2019-11-28 15:22:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:22:31,674 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2019-11-28 15:22:31,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 15:22:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2019-11-28 15:22:31,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-28 15:22:31,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:22:31,675 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-28 15:22:31,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:31,887 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:22:31,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:22:31,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1875846409, now seen corresponding path program 1 times [2019-11-28 15:22:31,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:22:31,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135396583] [2019-11-28 15:22:31,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:22:31,899 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:22:31,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060683055] [2019-11-28 15:22:31,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:22:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:22:32,058 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 15:22:32,059 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 15:22:32,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:22:32,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:22:32 BoogieIcfgContainer [2019-11-28 15:22:32,348 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 15:22:32,350 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 15:22:32,350 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 15:22:32,351 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 15:22:32,351 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:22:26" (3/4) ... [2019-11-28 15:22:32,353 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 15:22:32,441 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 15:22:32,442 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 15:22:32,444 INFO L168 Benchmark]: Toolchain (without parser) took 6937.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 209.7 MB). Free memory was 961.7 MB in the beginning and 989.7 MB in the end (delta: -28.0 MB). Peak memory consumption was 181.8 MB. Max. memory is 11.5 GB. [2019-11-28 15:22:32,444 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 15:22:32,445 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.36 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:22:32,446 INFO L168 Benchmark]: Boogie Procedure Inliner took 102.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -185.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2019-11-28 15:22:32,446 INFO L168 Benchmark]: Boogie Preprocessor took 40.11 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. [2019-11-28 15:22:32,447 INFO L168 Benchmark]: RCFGBuilder took 423.25 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: 31.4 MB). Peak memory consumption was 31.4 MB. Max. memory is 11.5 GB. [2019-11-28 15:22:32,447 INFO L168 Benchmark]: TraceAbstraction took 5996.50 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.0 MB). Free memory was 1.1 GB in the beginning and 996.6 MB in the end (delta: 108.0 MB). Peak memory consumption was 172.0 MB. Max. memory is 11.5 GB. [2019-11-28 15:22:32,448 INFO L168 Benchmark]: Witness Printer took 91.44 ms. Allocated memory is still 1.2 GB. Free memory was 996.6 MB in the beginning and 989.7 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-11-28 15:22:32,451 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 278.36 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 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 102.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -185.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 40.11 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 423.25 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: 31.4 MB). Peak memory consumption was 31.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5996.50 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.0 MB). Free memory was 1.1 GB in the beginning and 996.6 MB in the end (delta: 108.0 MB). Peak memory consumption was 172.0 MB. Max. memory is 11.5 GB. * Witness Printer took 91.44 ms. Allocated memory is still 1.2 GB. Free memory was 996.6 MB in the beginning and 989.7 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 53]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L6] int i; [L7] i = 0 VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND TRUE i < N [L8] x[i] = __VERIFIER_nondet_int() [L7] i++ VAL [N=3] [L7] COND FALSE !(i < N) VAL [N=3] [L36] int temp; [L37] int ret; [L38] int ret2; [L39] int ret5; [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L41] ret = rangesum(x) [L43] EXPR x[0] [L43] temp=x[0] [L43] EXPR x[1] [L43] x[0] = x[1] [L43] x[1] = temp [L14] int i; [L15] long long ret; [L16] ret = 0 [L17] int cnt = 0; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L44] ret2 = rangesum(x) [L45] EXPR x[0] [L45] temp=x[0] [L46] int i =0 ; VAL [N=3] [L46] COND TRUE i N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND FALSE !(i > N/2) VAL [N=3] [L18] i++ VAL [N=3] [L18] COND TRUE i < N VAL [N=3] [L19] COND TRUE i > N/2 [L20] EXPR x[i] [L20] ret = ret + x[i] [L21] cnt = cnt + 1 VAL [N=3] [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L24] COND TRUE cnt !=0 [L25] return ret / cnt; VAL [N=3] [L50] ret5 = rangesum(x) [L52] COND TRUE ret != ret2 || ret !=ret5 VAL [N=3] [L53] __VERIFIER_error() VAL [N=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Result: UNSAFE, OverallTime: 5.8s, OverallIterations: 13, TraceHistogramMax: 3, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 302 SDtfs, 579 SDslu, 411 SDs, 0 SdLazy, 718 SolverSat, 121 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 380 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=12, 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, 12 MinimizatonAttempts, 87 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 455 NumberOfCodeBlocks, 423 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 388 ConstructedInterpolants, 0 QuantifiedInterpolants, 37966 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1412 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 168/199 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...