./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s2iff.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-fpi/s2iff.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 8967477fad3f63e2bfcd3e1f6a22d5ba8da6ea5b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 22:31:48,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 22:31:48,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 22:31:48,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 22:31:48,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 22:31:48,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 22:31:48,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 22:31:48,684 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 22:31:48,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 22:31:48,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 22:31:48,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 22:31:48,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 22:31:48,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 22:31:48,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 22:31:48,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 22:31:48,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 22:31:48,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 22:31:48,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 22:31:48,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 22:31:48,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 22:31:48,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 22:31:48,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 22:31:48,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 22:31:48,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 22:31:48,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 22:31:48,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 22:31:48,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 22:31:48,729 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 22:31:48,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 22:31:48,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 22:31:48,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 22:31:48,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 22:31:48,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 22:31:48,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 22:31:48,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 22:31:48,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 22:31:48,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 22:31:48,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 22:31:48,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 22:31:48,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 22:31:48,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 22:31:48,740 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 22:31:48,773 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 22:31:48,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 22:31:48,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 22:31:48,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 22:31:48,776 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 22:31:48,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 22:31:48,776 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 22:31:48,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 22:31:48,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 22:31:48,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 22:31:48,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 22:31:48,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 22:31:48,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 22:31:48,778 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 22:31:48,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 22:31:48,779 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 22:31:48,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 22:31:48,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 22:31:48,780 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 22:31:48,781 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 22:31:48,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 22:31:48,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 22:31:48,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 22:31:48,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 22:31:48,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 22:31:48,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 22:31:48,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 22:31:48,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 22:31:48,784 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 -> 8967477fad3f63e2bfcd3e1f6a22d5ba8da6ea5b [2019-11-27 22:31:49,092 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 22:31:49,107 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 22:31:49,111 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 22:31:49,113 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 22:31:49,113 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 22:31:49,115 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s2iff.c [2019-11-27 22:31:49,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c976c73c/8b97ce6cfa104c7899bc0651cd4ad9d9/FLAG5811cee66 [2019-11-27 22:31:49,645 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 22:31:49,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2iff.c [2019-11-27 22:31:49,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c976c73c/8b97ce6cfa104c7899bc0651cd4ad9d9/FLAG5811cee66 [2019-11-27 22:31:50,054 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c976c73c/8b97ce6cfa104c7899bc0651cd4ad9d9 [2019-11-27 22:31:50,057 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 22:31:50,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 22:31:50,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 22:31:50,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 22:31:50,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 22:31:50,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 10:31:50" (1/1) ... [2019-11-27 22:31:50,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bba92c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:31:50, skipping insertion in model container [2019-11-27 22:31:50,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 10:31:50" (1/1) ... [2019-11-27 22:31:50,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 22:31:50,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 22:31:50,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 22:31:50,282 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 22:31:50,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 22:31:50,320 INFO L208 MainTranslator]: Completed translation [2019-11-27 22:31:50,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:31:50 WrapperNode [2019-11-27 22:31:50,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 22:31:50,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 22:31:50,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 22:31:50,322 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 22:31:50,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:31:50" (1/1) ... [2019-11-27 22:31:50,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:31:50" (1/1) ... [2019-11-27 22:31:50,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 22:31:50,418 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 22:31:50,418 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 22:31:50,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 22:31:50,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:31:50" (1/1) ... [2019-11-27 22:31:50,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:31:50" (1/1) ... [2019-11-27 22:31:50,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:31:50" (1/1) ... [2019-11-27 22:31:50,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:31:50" (1/1) ... [2019-11-27 22:31:50,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:31:50" (1/1) ... [2019-11-27 22:31:50,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:31:50" (1/1) ... [2019-11-27 22:31:50,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:31:50" (1/1) ... [2019-11-27 22:31:50,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 22:31:50,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 22:31:50,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 22:31:50,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 22:31:50,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:31:50" (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 22:31:50,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-27 22:31:50,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 22:31:50,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-27 22:31:50,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 22:31:50,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 22:31:50,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 22:31:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-27 22:31:50,799 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 22:31:50,800 INFO L297 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-27 22:31:50,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:31:50 BoogieIcfgContainer [2019-11-27 22:31:50,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 22:31:50,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 22:31:50,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 22:31:50,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 22:31:50,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 10:31:50" (1/3) ... [2019-11-27 22:31:50,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2316e604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 10:31:50, skipping insertion in model container [2019-11-27 22:31:50,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 10:31:50" (2/3) ... [2019-11-27 22:31:50,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2316e604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 10:31:50, skipping insertion in model container [2019-11-27 22:31:50,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:31:50" (3/3) ... [2019-11-27 22:31:50,826 INFO L109 eAbstractionObserver]: Analyzing ICFG s2iff.c [2019-11-27 22:31:50,836 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 22:31:50,841 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 22:31:50,855 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 22:31:50,880 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 22:31:50,881 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 22:31:50,881 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 22:31:50,881 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 22:31:50,881 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 22:31:50,882 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 22:31:50,882 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 22:31:50,882 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 22:31:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-27 22:31:50,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-27 22:31:50,902 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:31:50,904 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:31:50,904 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:31:50,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:31:50,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-11-27 22:31:50,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:31:50,917 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060530654] [2019-11-27 22:31:50,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:31:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:31:51,060 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 22:31:51,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060530654] [2019-11-27 22:31:51,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:31:51,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 22:31:51,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137416303] [2019-11-27 22:31:51,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 22:31:51,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:31:51,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 22:31:51,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 22:31:51,086 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-27 22:31:51,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:31:51,104 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-27 22:31:51,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 22:31:51,105 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-27 22:31:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:31:51,113 INFO L225 Difference]: With dead ends: 29 [2019-11-27 22:31:51,113 INFO L226 Difference]: Without dead ends: 13 [2019-11-27 22:31:51,116 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 22:31:51,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-27 22:31:51,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-27 22:31:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-27 22:31:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-27 22:31:51,145 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-27 22:31:51,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:31:51,145 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-27 22:31:51,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 22:31:51,146 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-27 22:31:51,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-27 22:31:51,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:31:51,146 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:31:51,147 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:31:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:31:51,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-11-27 22:31:51,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:31:51,148 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294093498] [2019-11-27 22:31:51,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:31:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:31:51,222 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 22:31:51,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294093498] [2019-11-27 22:31:51,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:31:51,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 22:31:51,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448311741] [2019-11-27 22:31:51,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 22:31:51,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:31:51,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 22:31:51,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 22:31:51,228 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-11-27 22:31:51,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:31:51,280 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-27 22:31:51,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 22:31:51,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-27 22:31:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:31:51,281 INFO L225 Difference]: With dead ends: 23 [2019-11-27 22:31:51,282 INFO L226 Difference]: Without dead ends: 15 [2019-11-27 22:31:51,283 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 22:31:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-27 22:31:51,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-27 22:31:51,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-27 22:31:51,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-27 22:31:51,288 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-27 22:31:51,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:31:51,288 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-27 22:31:51,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 22:31:51,289 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-27 22:31:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-27 22:31:51,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:31:51,290 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:31:51,290 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:31:51,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:31:51,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-11-27 22:31:51,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:31:51,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011213551] [2019-11-27 22:31:51,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:31:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:31:51,372 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 22:31:51,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011213551] [2019-11-27 22:31:51,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 22:31:51,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 22:31:51,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629475002] [2019-11-27 22:31:51,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 22:31:51,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:31:51,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 22:31:51,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 22:31:51,377 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-11-27 22:31:51,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:31:51,422 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-11-27 22:31:51,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 22:31:51,423 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-27 22:31:51,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:31:51,423 INFO L225 Difference]: With dead ends: 22 [2019-11-27 22:31:51,423 INFO L226 Difference]: Without dead ends: 18 [2019-11-27 22:31:51,424 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 22:31:51,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-27 22:31:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-11-27 22:31:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-27 22:31:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-27 22:31:51,429 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-11-27 22:31:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:31:51,430 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-27 22:31:51,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 22:31:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-27 22:31:51,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-27 22:31:51,431 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:31:51,431 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:31:51,431 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:31:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:31:51,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-11-27 22:31:51,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:31:51,433 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800081722] [2019-11-27 22:31:51,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:31:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:31:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 22:31:51,927 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800081722] [2019-11-27 22:31:51,927 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028948066] [2019-11-27 22:31:51,927 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 22:31:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:31:52,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-27 22:31:52,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:31:52,100 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 [2019-11-27 22:31:52,101 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-27 22:31:52,121 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 22:31:52,131 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 11 treesize of output 7 [2019-11-27 22:31:52,132 INFO L508 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-27 22:31:52,144 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 22:31:52,144 INFO L508 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-27 22:31:52,145 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-27 22:31:52,187 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 22 [2019-11-27 22:31:52,188 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-27 22:31:52,203 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 22:31:52,204 INFO L508 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-27 22:31:52,204 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-27 22:31:52,454 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 22:31:52,455 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 1 case distinctions, treesize of input 55 treesize of output 57 [2019-11-27 22:31:52,458 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-27 22:31:52,495 INFO L588 ElimStorePlain]: treesize reduction 32, result has 63.2 percent of original size [2019-11-27 22:31:52,498 INFO L508 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-27 22:31:52,498 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:55 [2019-11-27 22:31:52,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-27 22:31:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 22:31:52,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 22:31:52,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-11-27 22:31:52,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272581752] [2019-11-27 22:31:52,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-27 22:31:52,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:31:52,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-27 22:31:52,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-11-27 22:31:52,604 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 18 states. [2019-11-27 22:31:53,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:31:53,244 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-27 22:31:53,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-27 22:31:53,244 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-11-27 22:31:53,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:31:53,247 INFO L225 Difference]: With dead ends: 33 [2019-11-27 22:31:53,247 INFO L226 Difference]: Without dead ends: 24 [2019-11-27 22:31:53,248 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2019-11-27 22:31:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-27 22:31:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-27 22:31:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-27 22:31:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-27 22:31:53,255 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-11-27 22:31:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:31:53,256 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-27 22:31:53,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-27 22:31:53,256 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-27 22:31:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-27 22:31:53,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:31:53,257 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:31:53,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:31:53,467 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:31:53,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:31:53,468 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-11-27 22:31:53,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:31:53,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741145415] [2019-11-27 22:31:53,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:31:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:31:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 22:31:53,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741145415] [2019-11-27 22:31:53,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474186113] [2019-11-27 22:31:53,578 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 22:31:53,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-27 22:31:53,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:31:53,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-27 22:31:53,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:31:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 22:31:53,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 22:31:53,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-27 22:31:53,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362277718] [2019-11-27 22:31:53,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-27 22:31:53,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:31:53,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-27 22:31:53,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-27 22:31:53,679 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2019-11-27 22:31:53,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:31:53,843 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-27 22:31:53,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-27 22:31:53,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-27 22:31:53,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:31:53,845 INFO L225 Difference]: With dead ends: 31 [2019-11-27 22:31:53,846 INFO L226 Difference]: Without dead ends: 27 [2019-11-27 22:31:53,846 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-27 22:31:53,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-27 22:31:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-27 22:31:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-27 22:31:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-27 22:31:53,852 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-11-27 22:31:53,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:31:53,853 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-27 22:31:53,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-27 22:31:53,853 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-27 22:31:53,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-27 22:31:53,854 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:31:53,854 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:31:54,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:31:54,064 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:31:54,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:31:54,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1317941731, now seen corresponding path program 3 times [2019-11-27 22:31:54,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:31:54,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996808586] [2019-11-27 22:31:54,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:31:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 22:31:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 22:31:54,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996808586] [2019-11-27 22:31:54,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655135561] [2019-11-27 22:31:54,149 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 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 [2019-11-27 22:31:54,190 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-27 22:31:54,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 22:31:54,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-27 22:31:54,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 22:31:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 22:31:54,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 22:31:54,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-27 22:31:54,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434543032] [2019-11-27 22:31:54,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-27 22:31:54,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 22:31:54,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-27 22:31:54,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-27 22:31:54,226 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2019-11-27 22:31:54,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 22:31:54,355 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-27 22:31:54,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-27 22:31:54,358 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-27 22:31:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 22:31:54,358 INFO L225 Difference]: With dead ends: 35 [2019-11-27 22:31:54,358 INFO L226 Difference]: Without dead ends: 23 [2019-11-27 22:31:54,359 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-27 22:31:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-27 22:31:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-27 22:31:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-27 22:31:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-27 22:31:54,363 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-11-27 22:31:54,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 22:31:54,363 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-27 22:31:54,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-27 22:31:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-27 22:31:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-27 22:31:54,364 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 22:31:54,364 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 22:31:54,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 22:31:54,566 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 22:31:54,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 22:31:54,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 4 times [2019-11-27 22:31:54,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 22:31:54,568 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552872152] [2019-11-27 22:31:54,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 22:31:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 22:31:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 22:31:54,677 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 22:31:54,677 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 22:31:54,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 10:31:54 BoogieIcfgContainer [2019-11-27 22:31:54,733 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 22:31:54,733 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 22:31:54,734 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 22:31:54,734 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 22:31:54,734 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 10:31:50" (3/4) ... [2019-11-27 22:31:54,737 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 22:31:54,804 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 22:31:54,808 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 22:31:54,813 INFO L168 Benchmark]: Toolchain (without parser) took 4751.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 184.0 MB). Free memory was 961.7 MB in the beginning and 1.2 GB in the end (delta: -209.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 22:31:54,819 INFO L168 Benchmark]: CDTParser took 0.34 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. [2019-11-27 22:31:54,820 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.03 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-27 22:31:54,821 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.27 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -152.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-27 22:31:54,821 INFO L168 Benchmark]: Boogie Preprocessor took 47.27 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-27 22:31:54,822 INFO L168 Benchmark]: RCFGBuilder took 335.76 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: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. [2019-11-27 22:31:54,822 INFO L168 Benchmark]: TraceAbstraction took 3930.29 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 76.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -94.8 MB). Peak memory consumption was 309.0 MB. Max. memory is 11.5 GB. [2019-11-27 22:31:54,824 INFO L168 Benchmark]: Witness Printer took 74.36 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-27 22:31:54,828 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 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 262.03 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 96.27 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -152.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 47.27 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 335.76 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: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3930.29 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 76.5 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -94.8 MB). Peak memory consumption was 309.0 MB. Max. memory is 11.5 GB. * Witness Printer took 74.36 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. 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 sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] sum[0] = 1 [L27] i=0 VAL [N=2] [L27] COND TRUE i