./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/skippedu.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab 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-tiling/skippedu.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 e8f2cf545726d8f791bfc137e9eca7e9de4cb696 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-27 22:20:22,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 22:20:22,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 22:20:22,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 22:20:22,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 22:20:22,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 22:20:22,560 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 22:20:22,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 22:20:22,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 22:20:22,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 22:20:22,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 22:20:22,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 22:20:22,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 22:20:22,585 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 22:20:22,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 22:20:22,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 22:20:22,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 22:20:22,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 22:20:22,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 22:20:22,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 22:20:22,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 22:20:22,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 22:20:22,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 22:20:22,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 22:20:22,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 22:20:22,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 22:20:22,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 22:20:22,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 22:20:22,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 22:20:22,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 22:20:22,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 22:20:22,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 22:20:22,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 22:20:22,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 22:20:22,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 22:20:22,614 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 22:20:22,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 22:20:22,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 22:20:22,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 22:20:22,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 22:20:22,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 22:20:22,618 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 22:20:22,632 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 22:20:22,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 22:20:22,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 22:20:22,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 22:20:22,635 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 22:20:22,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 22:20:22,635 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 22:20:22,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 22:20:22,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 22:20:22,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 22:20:22,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 22:20:22,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 22:20:22,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 22:20:22,637 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 22:20:22,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 22:20:22,638 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 22:20:22,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 22:20:22,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 22:20:22,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 22:20:22,639 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 22:20:22,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 22:20:22,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 22:20:22,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 22:20:22,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 22:20:22,640 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 22:20:22,640 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 22:20:22,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 22:20:22,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 22:20:22,641 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 -> e8f2cf545726d8f791bfc137e9eca7e9de4cb696 [2019-11-27 22:20:22,946 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 22:20:22,959 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 22:20:22,964 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 22:20:22,965 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 22:20:22,965 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 22:20:22,967 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/skippedu.c [2019-11-27 22:20:23,023 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de86bde1a/8111271befb74511befb316ef46cbfdb/FLAGcde4f6461 [2019-11-27 22:20:23,409 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 22:20:23,410 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/skippedu.c [2019-11-27 22:20:23,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de86bde1a/8111271befb74511befb316ef46cbfdb/FLAGcde4f6461 [2019-11-27 22:20:23,768 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de86bde1a/8111271befb74511befb316ef46cbfdb [2019-11-27 22:20:23,771 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 22:20:23,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 22:20:23,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 22:20:23,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 22:20:23,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 22:20:23,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 10:20:23" (1/1) ... [2019-11-27 22:20:23,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e4844a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:20:23, skipping insertion in model container [2019-11-27 22:20:23,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 10:20:23" (1/1) ... [2019-11-27 22:20:23,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 22:20:23,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 22:20:24,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 22:20:24,067 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 22:20:24,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 22:20:24,120 INFO L208 MainTranslator]: Completed translation [2019-11-27 22:20:24,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:20:24 WrapperNode [2019-11-27 22:20:24,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 22:20:24,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 22:20:24,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 22:20:24,122 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 22:20:24,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:20:24" (1/1) ... [2019-11-27 22:20:24,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:20:24" (1/1) ... [2019-11-27 22:20:24,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 22:20:24,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 22:20:24,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 22:20:24,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 22:20:24,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:20:24" (1/1) ... [2019-11-27 22:20:24,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:20:24" (1/1) ... [2019-11-27 22:20:24,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:20:24" (1/1) ... [2019-11-27 22:20:24,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:20:24" (1/1) ... [2019-11-27 22:20:24,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:20:24" (1/1) ... [2019-11-27 22:20:24,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:20:24" (1/1) ... [2019-11-27 22:20:24,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:20:24" (1/1) ... [2019-11-27 22:20:24,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 22:20:24,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 22:20:24,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 22:20:24,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 22:20:24,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:20:24" (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 [2019-11-27 22:20:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 22:20:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-27 22:20:24,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 22:20:24,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 22:20:24,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 22:20:24,547 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 22:20:24,547 INFO L297 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-27 22:20:24,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:20:24 BoogieIcfgContainer [2019-11-27 22:20:24,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 22:20:24,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 22:20:24,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 22:20:24,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 22:20:24,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 10:20:23" (1/3) ... [2019-11-27 22:20:24,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@948d43d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 10:20:24, skipping insertion in model container [2019-11-27 22:20:24,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:20:24" (2/3) ... [2019-11-27 22:20:24,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@948d43d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 10:20:24, skipping insertion in model container [2019-11-27 22:20:24,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:20:24" (3/3) ... [2019-11-27 22:20:24,560 INFO L109 eAbstractionObserver]: Analyzing ICFG skippedu.c [2019-11-27 22:20:24,571 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 22:20:24,579 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 22:20:24,596 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 22:20:24,626 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 22:20:24,626 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 22:20:24,626 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 22:20:24,627 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 22:20:24,627 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 22:20:24,627 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 22:20:24,627 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 22:20:24,628 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 22:20:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-27 22:20:24,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-27 22:20:24,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:20:24,654 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:20:24,655 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:20:24,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:20:24,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1896653823, now seen corresponding path program 1 times [2019-11-27 22:20:24,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:20:24,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561781402] [2019-11-27 22:20:24,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:20:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:20:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 22:20:24,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561781402] [2019-11-27 22:20:24,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:20:24,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 22:20:24,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126197098] [2019-11-27 22:20:24,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 22:20:24,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:20:24,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 22:20:24,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 22:20:24,857 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-11-27 22:20:24,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:20:24,875 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2019-11-27 22:20:24,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 22:20:24,876 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-27 22:20:24,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:20:24,884 INFO L225 Difference]: With dead ends: 39 [2019-11-27 22:20:24,885 INFO L226 Difference]: Without dead ends: 18 [2019-11-27 22:20:24,888 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 [2019-11-27 22:20:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-27 22:20:24,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-27 22:20:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-27 22:20:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-27 22:20:24,920 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2019-11-27 22:20:24,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:20:24,920 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-27 22:20:24,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 22:20:24,921 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-27 22:20:24,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-27 22:20:24,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:20:24,922 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:20:24,922 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:20:24,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:20:24,923 INFO L82 PathProgramCache]: Analyzing trace with hash 866599033, now seen corresponding path program 1 times [2019-11-27 22:20:24,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:20:24,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897718963] [2019-11-27 22:20:24,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:20:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:20:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 22:20:25,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897718963] [2019-11-27 22:20:25,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:20:25,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:20:25,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303822630] [2019-11-27 22:20:25,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:20:25,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:20:25,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:20:25,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:20:25,011 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 3 states. [2019-11-27 22:20:25,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:20:25,061 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-11-27 22:20:25,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:20:25,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-27 22:20:25,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:20:25,063 INFO L225 Difference]: With dead ends: 33 [2019-11-27 22:20:25,064 INFO L226 Difference]: Without dead ends: 20 [2019-11-27 22:20:25,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:20:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-27 22:20:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-27 22:20:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-27 22:20:25,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-11-27 22:20:25,070 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2019-11-27 22:20:25,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:20:25,071 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-11-27 22:20:25,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:20:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-11-27 22:20:25,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-27 22:20:25,072 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:20:25,073 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:20:25,073 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:20:25,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:20:25,074 INFO L82 PathProgramCache]: Analyzing trace with hash -365251305, now seen corresponding path program 1 times [2019-11-27 22:20:25,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:20:25,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678764796] [2019-11-27 22:20:25,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:20:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:20:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-27 22:20:25,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678764796] [2019-11-27 22:20:25,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:20:25,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 22:20:25,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503815917] [2019-11-27 22:20:25,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 22:20:25,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:20:25,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 22:20:25,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:20:25,169 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2019-11-27 22:20:25,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:20:25,242 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2019-11-27 22:20:25,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 22:20:25,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-27 22:20:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:20:25,246 INFO L225 Difference]: With dead ends: 31 [2019-11-27 22:20:25,246 INFO L226 Difference]: Without dead ends: 24 [2019-11-27 22:20:25,247 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:20:25,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-27 22:20:25,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2019-11-27 22:20:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-27 22:20:25,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-27 22:20:25,253 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2019-11-27 22:20:25,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:20:25,254 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-27 22:20:25,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 22:20:25,254 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-27 22:20:25,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-27 22:20:25,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:20:25,255 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:20:25,256 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:20:25,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:20:25,256 INFO L82 PathProgramCache]: Analyzing trace with hash -388042032, now seen corresponding path program 1 times [2019-11-27 22:20:25,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:20:25,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762349003] [2019-11-27 22:20:25,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:20:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:20:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-27 22:20:25,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762349003] [2019-11-27 22:20:25,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794338007] [2019-11-27 22:20:25,355 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 [2019-11-27 22:20:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:20:25,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-27 22:20:25,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:20:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-27 22:20:25,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 22:20:25,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-27 22:20:25,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049679840] [2019-11-27 22:20:25,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-27 22:20:25,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:20:25,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-27 22:20:25,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-27 22:20:25,469 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 6 states. [2019-11-27 22:20:25,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:20:25,538 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2019-11-27 22:20:25,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-27 22:20:25,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-27 22:20:25,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:20:25,539 INFO L225 Difference]: With dead ends: 37 [2019-11-27 22:20:25,540 INFO L226 Difference]: Without dead ends: 23 [2019-11-27 22:20:25,540 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-27 22:20:25,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-27 22:20:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-27 22:20:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-27 22:20:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-27 22:20:25,546 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 17 [2019-11-27 22:20:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:20:25,546 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-27 22:20:25,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-27 22:20:25,547 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-27 22:20:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-27 22:20:25,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:20:25,548 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:20:25,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:20:25,758 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:20:25,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:20:25,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1547350130, now seen corresponding path program 2 times [2019-11-27 22:20:25,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:20:25,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122013057] [2019-11-27 22:20:25,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:20:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:20:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-27 22:20:26,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122013057] [2019-11-27 22:20:26,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52678682] [2019-11-27 22:20:26,088 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:20:26,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-27 22:20:26,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:20:26,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-27 22:20:26,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:20:26,216 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 0 case distinctions, treesize of input 20 treesize of output 16 [2019-11-27 22:20:26,217 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-27 22:20:26,226 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 22:20:26,226 INFO L508 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-27 22:20:26,227 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-11-27 22:20:26,247 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 26 treesize of output 21 [2019-11-27 22:20:26,253 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-27 22:20:26,257 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-27 22:20:26,261 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-27 22:20:26,264 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2019-11-27 22:20:26,265 INFO L508 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-27 22:20:26,271 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 22:20:26,272 INFO L508 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-27 22:20:26,280 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 22:20:26,281 INFO L508 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-27 22:20:26,281 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2019-11-27 22:20:26,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-27 22:20:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-27 22:20:26,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 22:20:26,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2019-11-27 22:20:26,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162448761] [2019-11-27 22:20:26,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-27 22:20:26,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:20:26,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-27 22:20:26,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-27 22:20:26,354 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 11 states. [2019-11-27 22:20:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:20:26,723 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2019-11-27 22:20:26,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-27 22:20:26,724 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-11-27 22:20:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:20:26,725 INFO L225 Difference]: With dead ends: 76 [2019-11-27 22:20:26,726 INFO L226 Difference]: Without dead ends: 74 [2019-11-27 22:20:26,727 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2019-11-27 22:20:26,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-27 22:20:26,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 43. [2019-11-27 22:20:26,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-27 22:20:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2019-11-27 22:20:26,736 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 19 [2019-11-27 22:20:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:20:26,737 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2019-11-27 22:20:26,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-27 22:20:26,737 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2019-11-27 22:20:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-27 22:20:26,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:20:26,739 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:20:26,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:20:26,943 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:20:26,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:20:26,943 INFO L82 PathProgramCache]: Analyzing trace with hash -2067558796, now seen corresponding path program 1 times [2019-11-27 22:20:26,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:20:26,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040992460] [2019-11-27 22:20:26,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:20:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 22:20:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 22:20:27,092 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 22:20:27,093 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 22:20:27,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 10:20:27 BoogieIcfgContainer [2019-11-27 22:20:27,127 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 22:20:27,127 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 22:20:27,127 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 22:20:27,128 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 22:20:27,128 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:20:24" (3/4) ... [2019-11-27 22:20:27,130 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 22:20:27,186 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 22:20:27,186 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 22:20:27,191 INFO L168 Benchmark]: Toolchain (without parser) took 3415.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.7 MB). Free memory was 952.3 MB in the beginning and 917.9 MB in the end (delta: 34.5 MB). Peak memory consumption was 158.2 MB. Max. memory is 11.5 GB. [2019-11-27 22:20:27,192 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 22:20:27,192 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.72 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-27 22:20:27,198 INFO L168 Benchmark]: Boogie Procedure Inliner took 98.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.7 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -172.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-27 22:20:27,199 INFO L168 Benchmark]: Boogie Preprocessor took 25.53 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. [2019-11-27 22:20:27,199 INFO L168 Benchmark]: RCFGBuilder took 303.82 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: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2019-11-27 22:20:27,200 INFO L168 Benchmark]: TraceAbstraction took 2575.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 917.9 MB in the end (delta: 171.3 MB). Peak memory consumption was 171.3 MB. Max. memory is 11.5 GB. [2019-11-27 22:20:27,200 INFO L168 Benchmark]: Witness Printer took 59.36 ms. Allocated memory is still 1.2 GB. Free memory is still 917.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 22:20:27,205 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 347.72 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 98.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 123.7 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -172.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.53 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 303.82 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: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2575.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 917.9 MB in the end (delta: 171.3 MB). Peak memory consumption was 171.3 MB. Max. memory is 11.5 GB. * Witness Printer took 59.36 ms. Allocated memory is still 1.2 GB. Free memory is still 917.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L7] int SIZE; [L9] const int MAX = 100000; VAL [MAX=100000, SIZE=0] [L13] SIZE = __VERIFIER_nondet_int() [L14] COND TRUE SIZE > 1 && SIZE < MAX [L16] int i; [L17] int *a = malloc(sizeof(int)*SIZE); [L19] i = 0 VAL [MAX=100000, SIZE=2] [L19] COND TRUE i < SIZE [L21] a[i] = __VERIFIER_nondet_int() [L19] i++ VAL [MAX=100000, SIZE=2] [L19] COND TRUE i < SIZE [L21] a[i] = __VERIFIER_nondet_int() [L19] i++ VAL [MAX=100000, SIZE=2] [L19] COND FALSE !(i < SIZE) VAL [MAX=100000, SIZE=2] [L24] COND FALSE !(SIZE % 2 != 0) [L27] i = 1 VAL [MAX=100000, SIZE=2] [L27] COND TRUE i <= SIZE/2 [L29] EXPR a[2*i-2] VAL [MAX=100000, SIZE=2] [L29] COND FALSE !(a[2*i-2] > i) [L33] EXPR a[2*i-1] VAL [MAX=100000, SIZE=2] [L33] COND TRUE a[2*i-1] > i [L35] a[2*i-1] = 2*i-1 VAL [MAX=100000, SIZE=2] [L27] i++ VAL [MAX=100000, SIZE=2] [L27] COND FALSE !(i <= SIZE/2) VAL [MAX=100000, SIZE=2] [L39] i = 0 VAL [MAX=100000, SIZE=2] [L39] COND TRUE i < SIZE [L41] a[i] [L3] COND TRUE !(cond) VAL [MAX=100000, SIZE=2] [L3] __VERIFIER_error() VAL [MAX=100000, SIZE=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.4s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 95 SDtfs, 145 SDslu, 69 SDs, 0 SdLazy, 198 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 37 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 7959 SizeOfPredicates, 12 NumberOfNonLiveVariables, 142 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 11/15 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...