./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn5f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/eqn5f.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2c6480746379e4e7ce6d546f9a1318408c455414 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 15:33:51,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 15:33:51,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 15:33:51,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 15:33:51,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 15:33:51,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 15:33:51,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 15:33:51,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 15:33:51,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 15:33:51,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 15:33:51,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 15:33:51,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 15:33:51,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 15:33:51,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 15:33:51,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 15:33:51,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 15:33:51,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 15:33:51,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 15:33:51,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 15:33:51,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 15:33:51,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 15:33:51,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 15:33:51,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 15:33:51,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 15:33:51,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 15:33:51,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 15:33:51,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 15:33:51,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 15:33:51,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 15:33:51,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 15:33:51,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 15:33:51,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 15:33:51,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 15:33:51,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 15:33:51,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 15:33:51,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 15:33:51,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 15:33:51,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 15:33:51,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 15:33:51,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 15:33:51,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 15:33:51,441 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 15:33:51,456 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 15:33:51,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 15:33:51,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 15:33:51,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 15:33:51,459 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 15:33:51,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 15:33:51,459 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 15:33:51,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 15:33:51,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 15:33:51,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 15:33:51,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 15:33:51,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 15:33:51,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 15:33:51,461 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 15:33:51,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 15:33:51,462 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 15:33:51,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 15:33:51,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 15:33:51,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 15:33:51,463 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 15:33:51,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 15:33:51,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 15:33:51,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 15:33:51,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 15:33:51,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 15:33:51,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 15:33:51,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 15:33:51,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 15:33:51,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 15:33:51,466 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 -> 2c6480746379e4e7ce6d546f9a1318408c455414 [2019-11-28 15:33:51,794 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 15:33:51,807 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 15:33:51,811 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 15:33:51,812 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 15:33:51,813 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 15:33:51,813 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn5f.c [2019-11-28 15:33:51,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d4fb4be5/9e8e2c46764045d0a09200c511723222/FLAG0bddeec7e [2019-11-28 15:33:52,290 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 15:33:52,291 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn5f.c [2019-11-28 15:33:52,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d4fb4be5/9e8e2c46764045d0a09200c511723222/FLAG0bddeec7e [2019-11-28 15:33:52,702 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d4fb4be5/9e8e2c46764045d0a09200c511723222 [2019-11-28 15:33:52,706 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 15:33:52,708 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 15:33:52,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 15:33:52,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 15:33:52,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 15:33:52,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:33:52" (1/1) ... [2019-11-28 15:33:52,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed5cf6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:52, skipping insertion in model container [2019-11-28 15:33:52,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:33:52" (1/1) ... [2019-11-28 15:33:52,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 15:33:52,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 15:33:52,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:33:52,959 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 15:33:52,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:33:52,996 INFO L208 MainTranslator]: Completed translation [2019-11-28 15:33:52,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:52 WrapperNode [2019-11-28 15:33:52,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 15:33:52,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 15:33:52,998 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 15:33:52,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 15:33:53,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:52" (1/1) ... [2019-11-28 15:33:53,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:52" (1/1) ... [2019-11-28 15:33:53,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 15:33:53,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 15:33:53,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 15:33:53,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 15:33:53,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:52" (1/1) ... [2019-11-28 15:33:53,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:52" (1/1) ... [2019-11-28 15:33:53,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:52" (1/1) ... [2019-11-28 15:33:53,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:52" (1/1) ... [2019-11-28 15:33:53,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:52" (1/1) ... [2019-11-28 15:33:53,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:52" (1/1) ... [2019-11-28 15:33:53,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:52" (1/1) ... [2019-11-28 15:33:53,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 15:33:53,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 15:33:53,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 15:33:53,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 15:33:53,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:52" (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 15:33:53,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 15:33:53,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 15:33:53,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 15:33:53,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 15:33:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 15:33:53,445 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 15:33:53,445 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-28 15:33:53,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:53 BoogieIcfgContainer [2019-11-28 15:33:53,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 15:33:53,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 15:33:53,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 15:33:53,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 15:33:53,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:33:52" (1/3) ... [2019-11-28 15:33:53,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5999add9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:33:53, skipping insertion in model container [2019-11-28 15:33:53,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:33:52" (2/3) ... [2019-11-28 15:33:53,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5999add9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:33:53, skipping insertion in model container [2019-11-28 15:33:53,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:53" (3/3) ... [2019-11-28 15:33:53,474 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2019-11-28 15:33:53,488 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 15:33:53,495 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 15:33:53,508 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 15:33:53,534 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 15:33:53,535 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 15:33:53,535 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 15:33:53,535 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 15:33:53,535 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 15:33:53,536 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 15:33:53,536 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 15:33:53,536 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 15:33:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-28 15:33:53,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 15:33:53,561 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:53,562 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:53,562 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:53,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:53,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1486647931, now seen corresponding path program 1 times [2019-11-28 15:33:53,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:53,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753009251] [2019-11-28 15:33:53,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:53,717 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 15:33:53,719 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753009251] [2019-11-28 15:33:53,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:33:53,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 15:33:53,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107265275] [2019-11-28 15:33:53,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 15:33:53,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:53,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 15:33:53,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 15:33:53,750 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-28 15:33:53,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:53,780 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2019-11-28 15:33:53,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 15:33:53,783 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-28 15:33:53,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:53,797 INFO L225 Difference]: With dead ends: 33 [2019-11-28 15:33:53,797 INFO L226 Difference]: Without dead ends: 15 [2019-11-28 15:33:53,805 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 15:33:53,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-28 15:33:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-28 15:33:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-28 15:33:53,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-28 15:33:53,852 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2019-11-28 15:33:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:53,853 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-28 15:33:53,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 15:33:53,854 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-28 15:33:53,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 15:33:53,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:53,855 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:53,856 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:53,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:53,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1772723449, now seen corresponding path program 1 times [2019-11-28 15:33:53,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:53,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205691699] [2019-11-28 15:33:53,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:53,907 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:33:53,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399315743] [2019-11-28 15:33:53,910 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 15:33:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:54,002 INFO L264 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 15:33:54,010 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:33:54,113 INFO L343 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2019-11-28 15:33:54,114 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2019-11-28 15:33:54,115 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:33:54,123 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 15:33:54,125 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-28 15:33:54,125 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:15 [2019-11-28 15:33:54,156 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 15:33:54,169 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 15:33:54,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205691699] [2019-11-28 15:33:54,170 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:33:54,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399315743] [2019-11-28 15:33:54,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:33:54,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 15:33:54,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686780801] [2019-11-28 15:33:54,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 15:33:54,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:54,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 15:33:54,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-28 15:33:54,175 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2019-11-28 15:33:54,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:54,274 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-28 15:33:54,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 15:33:54,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-28 15:33:54,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:54,275 INFO L225 Difference]: With dead ends: 32 [2019-11-28 15:33:54,276 INFO L226 Difference]: Without dead ends: 30 [2019-11-28 15:33:54,277 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-28 15:33:54,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-28 15:33:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2019-11-28 15:33:54,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-28 15:33:54,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-28 15:33:54,283 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 10 [2019-11-28 15:33:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:54,284 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-28 15:33:54,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 15:33:54,284 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-28 15:33:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 15:33:54,285 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:54,285 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:54,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:33:54,489 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:54,490 INFO L82 PathProgramCache]: Analyzing trace with hash 130601367, now seen corresponding path program 1 times [2019-11-28 15:33:54,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:54,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288762180] [2019-11-28 15:33:54,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:54,511 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:33:54,514 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670969526] [2019-11-28 15:33:54,515 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 15:33:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:54,568 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 15:33:54,569 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:33:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:33:54,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288762180] [2019-11-28 15:33:54,594 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:33:54,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670969526] [2019-11-28 15:33:54,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:33:54,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 15:33:54,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661112306] [2019-11-28 15:33:54,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 15:33:54,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:54,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 15:33:54,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-28 15:33:54,597 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2019-11-28 15:33:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:54,685 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-11-28 15:33:54,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 15:33:54,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-28 15:33:54,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:54,687 INFO L225 Difference]: With dead ends: 47 [2019-11-28 15:33:54,687 INFO L226 Difference]: Without dead ends: 38 [2019-11-28 15:33:54,688 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-28 15:33:54,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-28 15:33:54,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 21. [2019-11-28 15:33:54,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-28 15:33:54,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-28 15:33:54,694 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2019-11-28 15:33:54,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:54,695 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-28 15:33:54,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 15:33:54,696 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-28 15:33:54,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 15:33:54,696 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:54,697 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:54,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:33:54,898 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:54,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:54,899 INFO L82 PathProgramCache]: Analyzing trace with hash 827904471, now seen corresponding path program 1 times [2019-11-28 15:33:54,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:54,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652272750] [2019-11-28 15:33:54,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:54,920 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:33:54,921 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093199658] [2019-11-28 15:33:54,922 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 15:33:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:54,984 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 15:33:54,985 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:33:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:33:55,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652272750] [2019-11-28 15:33:55,016 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:33:55,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093199658] [2019-11-28 15:33:55,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:33:55,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-28 15:33:55,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139928221] [2019-11-28 15:33:55,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 15:33:55,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:55,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 15:33:55,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-28 15:33:55,019 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2019-11-28 15:33:55,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:55,132 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-28 15:33:55,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 15:33:55,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-28 15:33:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:55,134 INFO L225 Difference]: With dead ends: 42 [2019-11-28 15:33:55,134 INFO L226 Difference]: Without dead ends: 35 [2019-11-28 15:33:55,136 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-28 15:33:55,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-28 15:33:55,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2019-11-28 15:33:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-28 15:33:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-28 15:33:55,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-11-28 15:33:55,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:55,146 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-28 15:33:55,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 15:33:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-28 15:33:55,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 15:33:55,148 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:55,149 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:55,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:33:55,350 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:55,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:55,350 INFO L82 PathProgramCache]: Analyzing trace with hash 437833903, now seen corresponding path program 1 times [2019-11-28 15:33:55,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:55,351 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351761893] [2019-11-28 15:33:55,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:55,362 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:33:55,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780003096] [2019-11-28 15:33:55,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:33:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:55,413 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 15:33:55,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:33:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:33:55,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351761893] [2019-11-28 15:33:55,448 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:33:55,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780003096] [2019-11-28 15:33:55,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:33:55,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-28 15:33:55,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755804480] [2019-11-28 15:33:55,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 15:33:55,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:55,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 15:33:55,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-28 15:33:55,451 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-11-28 15:33:55,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:55,537 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-11-28 15:33:55,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 15:33:55,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-28 15:33:55,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:55,540 INFO L225 Difference]: With dead ends: 39 [2019-11-28 15:33:55,540 INFO L226 Difference]: Without dead ends: 25 [2019-11-28 15:33:55,541 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-28 15:33:55,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-28 15:33:55,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2019-11-28 15:33:55,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 15:33:55,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-28 15:33:55,549 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2019-11-28 15:33:55,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:55,550 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-28 15:33:55,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 15:33:55,551 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-28 15:33:55,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 15:33:55,552 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:55,552 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:55,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:33:55,757 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:55,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1602337035, now seen corresponding path program 1 times [2019-11-28 15:33:55,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:55,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247445066] [2019-11-28 15:33:55,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:55,790 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:33:55,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852265030] [2019-11-28 15:33:55,798 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 15:33:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:33:55,857 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-28 15:33:55,860 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:33:55,887 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-28 15:33:55,888 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:33:55,902 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 15:33:55,911 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2019-11-28 15:33:55,911 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-28 15:33:55,921 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 15:33:55,921 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 15:33:55,922 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2019-11-28 15:33:56,000 INFO L343 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2019-11-28 15:33:56,001 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2019-11-28 15:33:56,003 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:33:56,033 INFO L614 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2019-11-28 15:33:56,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 15:33:56,036 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-28 15:33:56,037 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2019-11-28 15:33:56,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 15:33:56,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 15:33:56,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 15:33:56,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 15:33:56,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 15:33:56,176 INFO L430 ElimStorePlain]: Different costs {12=[|v_#memory_int_12|], 20=[v_prenex_4]} [2019-11-28 15:33:56,183 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-28 15:33:56,186 INFO L343 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2019-11-28 15:33:56,187 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2019-11-28 15:33:56,189 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 15:33:56,234 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 15:33:56,242 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-28 15:33:56,270 INFO L343 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2019-11-28 15:33:56,271 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 85 [2019-11-28 15:33:56,273 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-28 15:33:56,331 INFO L614 ElimStorePlain]: treesize reduction 51, result has 69.3 percent of original size [2019-11-28 15:33:56,334 INFO L534 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-11-28 15:33:56,334 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:115 [2019-11-28 15:33:56,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 15:33:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:33:56,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247445066] [2019-11-28 15:33:56,492 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:33:56,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852265030] [2019-11-28 15:33:56,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:33:56,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-28 15:33:56,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466797098] [2019-11-28 15:33:56,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 15:33:56,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:56,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 15:33:56,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-28 15:33:56,495 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2019-11-28 15:33:56,782 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2019-11-28 15:33:57,118 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2019-11-28 15:33:57,329 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2019-11-28 15:33:57,510 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2019-11-28 15:33:57,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:57,583 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-28 15:33:57,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 15:33:57,584 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-28 15:33:57,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:57,585 INFO L225 Difference]: With dead ends: 42 [2019-11-28 15:33:57,585 INFO L226 Difference]: Without dead ends: 40 [2019-11-28 15:33:57,586 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-28 15:33:57,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-28 15:33:57,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2019-11-28 15:33:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 15:33:57,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-28 15:33:57,594 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 14 [2019-11-28 15:33:57,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:57,594 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-28 15:33:57,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 15:33:57,595 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-28 15:33:57,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 15:33:57,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:57,596 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:57,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:33:57,800 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:57,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:57,801 INFO L82 PathProgramCache]: Analyzing trace with hash -602215277, now seen corresponding path program 2 times [2019-11-28 15:33:57,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:57,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638309294] [2019-11-28 15:33:57,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:57,826 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:33:57,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009737253] [2019-11-28 15:33:57,828 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 15:33:57,882 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 15:33:57,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:33:57,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 15:33:57,887 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:33:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:33:57,927 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638309294] [2019-11-28 15:33:57,927 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:33:57,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009737253] [2019-11-28 15:33:57,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:33:57,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-28 15:33:57,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224881992] [2019-11-28 15:33:57,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 15:33:57,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:57,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 15:33:57,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-28 15:33:57,935 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-11-28 15:33:58,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:58,097 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2019-11-28 15:33:58,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 15:33:58,101 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-28 15:33:58,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:58,101 INFO L225 Difference]: With dead ends: 59 [2019-11-28 15:33:58,102 INFO L226 Difference]: Without dead ends: 50 [2019-11-28 15:33:58,102 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-11-28 15:33:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-28 15:33:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 26. [2019-11-28 15:33:58,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 15:33:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-28 15:33:58,109 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 16 [2019-11-28 15:33:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:58,109 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-28 15:33:58,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 15:33:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-28 15:33:58,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 15:33:58,110 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:58,110 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:58,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:33:58,320 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:58,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:58,321 INFO L82 PathProgramCache]: Analyzing trace with hash -508830509, now seen corresponding path program 3 times [2019-11-28 15:33:58,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:58,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233886128] [2019-11-28 15:33:58,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:58,343 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:33:58,345 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739191963] [2019-11-28 15:33:58,345 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:33:58,385 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-28 15:33:58,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 15:33:58,386 INFO L264 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 15:33:58,387 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:33:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:33:58,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233886128] [2019-11-28 15:33:58,435 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-28 15:33:58,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739191963] [2019-11-28 15:33:58,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-28 15:33:58,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-28 15:33:58,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707892683] [2019-11-28 15:33:58,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 15:33:58,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:33:58,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 15:33:58,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-28 15:33:58,438 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2019-11-28 15:33:58,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:33:58,538 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2019-11-28 15:33:58,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 15:33:58,539 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-28 15:33:58,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:33:58,540 INFO L225 Difference]: With dead ends: 54 [2019-11-28 15:33:58,540 INFO L226 Difference]: Without dead ends: 47 [2019-11-28 15:33:58,540 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-28 15:33:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-28 15:33:58,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2019-11-28 15:33:58,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-28 15:33:58,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-11-28 15:33:58,547 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 16 [2019-11-28 15:33:58,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:33:58,547 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-11-28 15:33:58,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 15:33:58,547 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-11-28 15:33:58,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 15:33:58,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:33:58,549 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:33:58,753 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:33:58,753 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:33:58,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:33:58,754 INFO L82 PathProgramCache]: Analyzing trace with hash 575675563, now seen corresponding path program 1 times [2019-11-28 15:33:58,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:33:58,755 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587202765] [2019-11-28 15:33:58,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:33:58,770 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-28 15:33:58,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692611053] [2019-11-28 15:33:58,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:33:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:33:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:33:58,847 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 15:33:58,847 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 15:33:59,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:33:59,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:33:59 BoogieIcfgContainer [2019-11-28 15:33:59,094 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 15:33:59,095 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 15:33:59,095 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 15:33:59,095 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 15:33:59,095 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:33:53" (3/4) ... [2019-11-28 15:33:59,097 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 15:33:59,175 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 15:33:59,175 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 15:33:59,177 INFO L168 Benchmark]: Toolchain (without parser) took 6469.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 190.3 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -157.7 MB). Peak memory consumption was 32.6 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:59,180 INFO L168 Benchmark]: CDTParser took 0.28 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 15:33:59,184 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.77 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:59,188 INFO L168 Benchmark]: Boogie Procedure Inliner took 101.02 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.5 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -168.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:59,189 INFO L168 Benchmark]: Boogie Preprocessor took 27.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:59,190 INFO L168 Benchmark]: RCFGBuilder took 320.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:59,190 INFO L168 Benchmark]: TraceAbstraction took 5637.62 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 71.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -31.7 MB). Peak memory consumption was 40.1 MB. Max. memory is 11.5 GB. [2019-11-28 15:33:59,193 INFO L168 Benchmark]: Witness Printer took 80.59 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: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2019-11-28 15:33:59,197 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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 288.77 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 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 101.02 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 118.5 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -168.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 320.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5637.62 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 71.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -31.7 MB). Peak memory consumption was 40.1 MB. Max. memory is 11.5 GB. * Witness Printer took 80.59 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: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long *a = malloc(sizeof(long long)*N); [L24] long long *b = malloc(sizeof(long long)*N); [L26] a[0] = 1 [L27] b[0] = 1 [L28] i=1 VAL [N=2] [L28] COND TRUE i