./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s1iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de1bb103 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/s1iff.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 f327e5a5b021f775646fced96474c3f2382bd51e ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-de1bb10 [2019-11-27 13:08:20,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 13:08:20,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 13:08:20,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 13:08:20,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 13:08:20,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 13:08:20,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 13:08:20,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 13:08:20,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 13:08:20,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 13:08:20,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 13:08:20,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 13:08:20,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 13:08:20,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 13:08:20,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 13:08:20,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 13:08:20,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 13:08:20,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 13:08:20,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 13:08:20,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 13:08:20,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 13:08:20,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 13:08:20,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 13:08:20,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 13:08:20,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 13:08:20,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 13:08:20,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 13:08:20,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 13:08:20,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 13:08:20,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 13:08:20,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 13:08:20,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 13:08:20,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 13:08:20,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 13:08:20,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 13:08:20,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 13:08:20,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 13:08:20,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 13:08:20,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 13:08:20,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 13:08:20,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 13:08:20,235 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 13:08:20,272 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 13:08:20,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 13:08:20,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 13:08:20,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 13:08:20,277 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 13:08:20,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 13:08:20,279 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 13:08:20,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 13:08:20,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 13:08:20,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 13:08:20,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 13:08:20,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 13:08:20,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 13:08:20,282 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 13:08:20,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 13:08:20,283 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 13:08:20,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 13:08:20,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 13:08:20,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 13:08:20,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 13:08:20,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 13:08:20,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 13:08:20,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 13:08:20,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 13:08:20,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 13:08:20,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 13:08:20,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 13:08:20,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 13:08:20,287 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 -> f327e5a5b021f775646fced96474c3f2382bd51e [2019-11-27 13:08:20,594 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 13:08:20,612 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 13:08:20,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 13:08:20,619 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 13:08:20,620 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 13:08:20,621 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s1iff.c [2019-11-27 13:08:20,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9427b9229/523b9a7fbf8745dbae5b911c4e4eb9c1/FLAGb870bb135 [2019-11-27 13:08:21,171 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 13:08:21,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s1iff.c [2019-11-27 13:08:21,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9427b9229/523b9a7fbf8745dbae5b911c4e4eb9c1/FLAGb870bb135 [2019-11-27 13:08:21,550 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9427b9229/523b9a7fbf8745dbae5b911c4e4eb9c1 [2019-11-27 13:08:21,554 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 13:08:21,556 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 13:08:21,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 13:08:21,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 13:08:21,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 13:08:21,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 01:08:21" (1/1) ... [2019-11-27 13:08:21,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14911ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 01:08:21, skipping insertion in model container [2019-11-27 13:08:21,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 01:08:21" (1/1) ... [2019-11-27 13:08:21,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 13:08:21,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 13:08:21,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 13:08:21,802 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 13:08:21,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 13:08:21,837 INFO L208 MainTranslator]: Completed translation [2019-11-27 13:08:21,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 01:08:21 WrapperNode [2019-11-27 13:08:21,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 13:08:21,839 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 13:08:21,839 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 13:08:21,840 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 13:08:21,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 01:08:21" (1/1) ... [2019-11-27 13:08:21,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 01:08:21" (1/1) ... [2019-11-27 13:08:21,936 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 13:08:21,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 13:08:21,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 13:08:21,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 13:08:21,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 01:08:21" (1/1) ... [2019-11-27 13:08:21,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 01:08:21" (1/1) ... [2019-11-27 13:08:21,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 01:08:21" (1/1) ... [2019-11-27 13:08:21,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 01:08:21" (1/1) ... [2019-11-27 13:08:21,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 01:08:21" (1/1) ... [2019-11-27 13:08:21,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 01:08:21" (1/1) ... [2019-11-27 13:08:21,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 01:08:21" (1/1) ... [2019-11-27 13:08:21,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 13:08:21,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 13:08:21,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 13:08:21,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 13:08:21,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 01:08:21" (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 13:08:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-27 13:08:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 13:08:22,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-27 13:08:22,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 13:08:22,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 13:08:22,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 13:08:22,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-27 13:08:22,300 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 13:08:22,300 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-27 13:08:22,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 01:08:22 BoogieIcfgContainer [2019-11-27 13:08:22,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 13:08:22,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 13:08:22,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 13:08:22,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 13:08:22,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 01:08:21" (1/3) ... [2019-11-27 13:08:22,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661dc86e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 01:08:22, skipping insertion in model container [2019-11-27 13:08:22,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 01:08:21" (2/3) ... [2019-11-27 13:08:22,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@661dc86e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 01:08:22, skipping insertion in model container [2019-11-27 13:08:22,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 01:08:22" (3/3) ... [2019-11-27 13:08:22,310 INFO L109 eAbstractionObserver]: Analyzing ICFG s1iff.c [2019-11-27 13:08:22,321 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 13:08:22,329 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-27 13:08:22,342 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-27 13:08:22,362 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 13:08:22,363 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 13:08:22,363 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 13:08:22,363 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 13:08:22,363 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 13:08:22,364 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 13:08:22,364 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 13:08:22,364 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 13:08:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-27 13:08:22,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-27 13:08:22,383 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 13:08:22,384 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 13:08:22,384 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 13:08:22,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 13:08:22,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-11-27 13:08:22,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 13:08:22,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139868615] [2019-11-27 13:08:22,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 13:08:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 13:08:22,538 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 13:08:22,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139868615] [2019-11-27 13:08:22,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 13:08:22,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 13:08:22,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845147673] [2019-11-27 13:08:22,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 13:08:22,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 13:08:22,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 13:08:22,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 13:08:22,561 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-27 13:08:22,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 13:08:22,577 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-27 13:08:22,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 13:08:22,578 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-27 13:08:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 13:08:22,586 INFO L225 Difference]: With dead ends: 29 [2019-11-27 13:08:22,586 INFO L226 Difference]: Without dead ends: 13 [2019-11-27 13:08:22,590 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 13:08:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-27 13:08:22,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-27 13:08:22,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-27 13:08:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-27 13:08:22,627 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-27 13:08:22,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 13:08:22,627 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-27 13:08:22,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 13:08:22,628 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-27 13:08:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-27 13:08:22,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 13:08:22,629 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 13:08:22,629 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 13:08:22,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 13:08:22,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-11-27 13:08:22,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 13:08:22,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700833946] [2019-11-27 13:08:22,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 13:08:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 13:08:22,720 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 13:08:22,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700833946] [2019-11-27 13:08:22,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 13:08:22,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 13:08:22,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336580994] [2019-11-27 13:08:22,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 13:08:22,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 13:08:22,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 13:08:22,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 13:08:22,728 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-11-27 13:08:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 13:08:22,821 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-27 13:08:22,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 13:08:22,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-27 13:08:22,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 13:08:22,823 INFO L225 Difference]: With dead ends: 23 [2019-11-27 13:08:22,823 INFO L226 Difference]: Without dead ends: 15 [2019-11-27 13:08:22,825 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 13:08:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-27 13:08:22,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-27 13:08:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-27 13:08:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-27 13:08:22,831 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-27 13:08:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 13:08:22,832 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-27 13:08:22,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 13:08:22,832 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-27 13:08:22,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-27 13:08:22,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 13:08:22,833 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 13:08:22,834 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 13:08:22,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 13:08:22,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-11-27 13:08:22,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 13:08:22,836 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273057922] [2019-11-27 13:08:22,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 13:08:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 13:08:22,949 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 13:08:22,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273057922] [2019-11-27 13:08:22,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 13:08:22,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 13:08:22,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520539965] [2019-11-27 13:08:22,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 13:08:22,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 13:08:22,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 13:08:22,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-27 13:08:22,954 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-11-27 13:08:23,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 13:08:23,016 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-11-27 13:08:23,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 13:08:23,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-27 13:08:23,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 13:08:23,018 INFO L225 Difference]: With dead ends: 22 [2019-11-27 13:08:23,019 INFO L226 Difference]: Without dead ends: 18 [2019-11-27 13:08:23,019 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 13:08:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-27 13:08:23,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-11-27 13:08:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-27 13:08:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-27 13:08:23,026 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-11-27 13:08:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 13:08:23,026 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-27 13:08:23,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 13:08:23,027 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-27 13:08:23,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-27 13:08:23,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 13:08:23,028 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 13:08:23,029 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 13:08:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 13:08:23,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-11-27 13:08:23,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 13:08:23,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980669735] [2019-11-27 13:08:23,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 13:08:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 13:08:23,453 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 13:08:23,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980669735] [2019-11-27 13:08:23,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989235915] [2019-11-27 13:08:23,455 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 13:08:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 13:08:23,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-27 13:08:23,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 13:08:23,600 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 13:08:23,601 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-27 13:08:23,620 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 13:08:23,633 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 13:08:23,634 INFO L508 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-27 13:08:23,648 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 13:08:23,648 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 13:08:23,650 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-27 13:08:23,705 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 13:08:23,707 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-27 13:08:23,726 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 13:08:23,727 INFO L508 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-27 13:08:23,728 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-27 13:08:23,948 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-27 13:08:23,949 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 13:08:23,950 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-27 13:08:23,994 INFO L588 ElimStorePlain]: treesize reduction 24, result has 69.6 percent of original size [2019-11-27 13:08:23,996 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 13:08:23,997 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:55 [2019-11-27 13:08:24,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-27 13:08:24,087 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 13:08:24,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 13:08:24,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-27 13:08:24,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736047497] [2019-11-27 13:08:24,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-27 13:08:24,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 13:08:24,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-27 13:08:24,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-11-27 13:08:24,091 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 16 states. [2019-11-27 13:08:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 13:08:24,622 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-27 13:08:24,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-27 13:08:24,622 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2019-11-27 13:08:24,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 13:08:24,625 INFO L225 Difference]: With dead ends: 33 [2019-11-27 13:08:24,625 INFO L226 Difference]: Without dead ends: 24 [2019-11-27 13:08:24,626 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2019-11-27 13:08:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-27 13:08:24,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-27 13:08:24,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-27 13:08:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-27 13:08:24,634 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-11-27 13:08:24,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 13:08:24,635 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-27 13:08:24,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-27 13:08:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-27 13:08:24,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-27 13:08:24,636 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 13:08:24,636 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 13:08:24,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 13:08:24,843 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 13:08:24,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 13:08:24,845 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-11-27 13:08:24,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 13:08:24,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350062432] [2019-11-27 13:08:24,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 13:08:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 13:08:24,920 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 13:08:24,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350062432] [2019-11-27 13:08:24,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353375109] [2019-11-27 13:08:24,921 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 13:08:24,961 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-27 13:08:24,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 13:08:24,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-27 13:08:24,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 13:08:25,013 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 13:08:25,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 13:08:25,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-27 13:08:25,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146830578] [2019-11-27 13:08:25,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-27 13:08:25,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 13:08:25,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-27 13:08:25,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-27 13:08:25,016 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2019-11-27 13:08:25,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 13:08:25,202 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-27 13:08:25,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-27 13:08:25,203 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-27 13:08:25,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 13:08:25,204 INFO L225 Difference]: With dead ends: 31 [2019-11-27 13:08:25,204 INFO L226 Difference]: Without dead ends: 27 [2019-11-27 13:08:25,204 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 13:08:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-27 13:08:25,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-27 13:08:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-27 13:08:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-27 13:08:25,211 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-11-27 13:08:25,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 13:08:25,212 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-27 13:08:25,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-27 13:08:25,212 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-27 13:08:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-27 13:08:25,213 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 13:08:25,213 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 13:08:25,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 13:08:25,417 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 13:08:25,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 13:08:25,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1317941731, now seen corresponding path program 3 times [2019-11-27 13:08:25,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 13:08:25,418 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752795367] [2019-11-27 13:08:25,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 13:08:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 13:08:25,512 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 13:08:25,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752795367] [2019-11-27 13:08:25,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642092435] [2019-11-27 13:08:25,513 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:08:25,567 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-27 13:08:25,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-27 13:08:25,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-27 13:08:25,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-27 13:08:25,607 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 13:08:25,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-27 13:08:25,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-27 13:08:25,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746314658] [2019-11-27 13:08:25,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-27 13:08:25,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 13:08:25,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-27 13:08:25,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-27 13:08:25,609 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2019-11-27 13:08:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 13:08:25,714 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-27 13:08:25,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-27 13:08:25,715 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-27 13:08:25,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 13:08:25,716 INFO L225 Difference]: With dead ends: 35 [2019-11-27 13:08:25,716 INFO L226 Difference]: Without dead ends: 23 [2019-11-27 13:08:25,717 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 13:08:25,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-27 13:08:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-27 13:08:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-27 13:08:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-27 13:08:25,724 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-11-27 13:08:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 13:08:25,724 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-27 13:08:25,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-27 13:08:25,724 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-27 13:08:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-27 13:08:25,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 13:08:25,725 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 13:08:25,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-27 13:08:25,929 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 13:08:25,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 13:08:25,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 4 times [2019-11-27 13:08:25,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 13:08:25,931 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796685170] [2019-11-27 13:08:25,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 13:08:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 13:08:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 13:08:26,018 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 13:08:26,019 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 13:08:26,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 01:08:26 BoogieIcfgContainer [2019-11-27 13:08:26,061 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 13:08:26,061 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 13:08:26,061 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 13:08:26,061 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 13:08:26,062 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 01:08:22" (3/4) ... [2019-11-27 13:08:26,064 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 13:08:26,119 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 13:08:26,120 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 13:08:26,122 INFO L168 Benchmark]: Toolchain (without parser) took 4565.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 955.0 MB in the beginning and 829.6 MB in the end (delta: 125.4 MB). Peak memory consumption was 262.7 MB. Max. memory is 11.5 GB. [2019-11-27 13:08:26,122 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 13:08:26,123 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.05 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-27 13:08:26,128 INFO L168 Benchmark]: Boogie Procedure Inliner took 98.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -189.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-27 13:08:26,128 INFO L168 Benchmark]: Boogie Preprocessor took 28.69 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-27 13:08:26,129 INFO L168 Benchmark]: RCFGBuilder took 329.76 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: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. [2019-11-27 13:08:26,130 INFO L168 Benchmark]: TraceAbstraction took 3758.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 836.2 MB in the end (delta: 272.2 MB). Peak memory consumption was 272.2 MB. Max. memory is 11.5 GB. [2019-11-27 13:08:26,132 INFO L168 Benchmark]: Witness Printer took 58.61 ms. Allocated memory is still 1.2 GB. Free memory was 836.2 MB in the beginning and 829.6 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-27 13:08:26,140 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 282.05 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 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 98.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -189.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.69 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 329.76 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: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3758.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 836.2 MB in the end (delta: 272.2 MB). Peak memory consumption was 272.2 MB. Max. memory is 11.5 GB. * Witness Printer took 58.61 ms. Allocated memory is still 1.2 GB. Free memory was 836.2 MB in the beginning and 829.6 MB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. 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