./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn2f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 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/eqn2f.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 2c6e78e9875ea4d3aa8cd80df3425a04d4efa8e7 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-678e011 [2019-11-19 20:49:59,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 20:49:59,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 20:49:59,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 20:49:59,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 20:49:59,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 20:49:59,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 20:49:59,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 20:49:59,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 20:49:59,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 20:49:59,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 20:49:59,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 20:49:59,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 20:49:59,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 20:49:59,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 20:49:59,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 20:49:59,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 20:49:59,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 20:49:59,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 20:49:59,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 20:49:59,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 20:49:59,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 20:49:59,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 20:49:59,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 20:49:59,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 20:49:59,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 20:49:59,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 20:49:59,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 20:49:59,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 20:49:59,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 20:49:59,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 20:49:59,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 20:49:59,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 20:49:59,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 20:49:59,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 20:49:59,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 20:49:59,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 20:49:59,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 20:49:59,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 20:49:59,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 20:49:59,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 20:49:59,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 20:49:59,356 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 20:49:59,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 20:49:59,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 20:49:59,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 20:49:59,361 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 20:49:59,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 20:49:59,361 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 20:49:59,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 20:49:59,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 20:49:59,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 20:49:59,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 20:49:59,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 20:49:59,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 20:49:59,364 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 20:49:59,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 20:49:59,365 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 20:49:59,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 20:49:59,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 20:49:59,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 20:49:59,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 20:49:59,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 20:49:59,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 20:49:59,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 20:49:59,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 20:49:59,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 20:49:59,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 20:49:59,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 20:49:59,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 20:49:59,369 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 -> 2c6e78e9875ea4d3aa8cd80df3425a04d4efa8e7 [2019-11-19 20:49:59,689 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 20:49:59,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 20:49:59,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 20:49:59,706 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 20:49:59,707 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 20:49:59,708 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn2f.c [2019-11-19 20:49:59,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e57a1b781/e41303bab9b741b88526f4b33e29d73c/FLAGc0488e9c9 [2019-11-19 20:50:00,192 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 20:50:00,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2f.c [2019-11-19 20:50:00,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e57a1b781/e41303bab9b741b88526f4b33e29d73c/FLAGc0488e9c9 [2019-11-19 20:50:00,594 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e57a1b781/e41303bab9b741b88526f4b33e29d73c [2019-11-19 20:50:00,597 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 20:50:00,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 20:50:00,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 20:50:00,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 20:50:00,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 20:50:00,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:50:00" (1/1) ... [2019-11-19 20:50:00,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee5db65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:50:00, skipping insertion in model container [2019-11-19 20:50:00,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:50:00" (1/1) ... [2019-11-19 20:50:00,615 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 20:50:00,632 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 20:50:00,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 20:50:00,830 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 20:50:00,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 20:50:00,861 INFO L192 MainTranslator]: Completed translation [2019-11-19 20:50:00,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:50:00 WrapperNode [2019-11-19 20:50:00,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 20:50:00,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 20:50:00,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 20:50:00,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 20:50:00,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:50:00" (1/1) ... [2019-11-19 20:50:00,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:50:00" (1/1) ... [2019-11-19 20:50:00,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 20:50:00,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 20:50:00,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 20:50:00,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 20:50:00,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:50:00" (1/1) ... [2019-11-19 20:50:00,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:50:00" (1/1) ... [2019-11-19 20:50:00,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:50:00" (1/1) ... [2019-11-19 20:50:00,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:50:00" (1/1) ... [2019-11-19 20:50:00,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:50:00" (1/1) ... [2019-11-19 20:50:00,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:50:00" (1/1) ... [2019-11-19 20:50:00,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:50:00" (1/1) ... [2019-11-19 20:50:00,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 20:50:00,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 20:50:00,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 20:50:00,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 20:50:00,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:50:00" (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 [2019-11-19 20:50:01,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-19 20:50:01,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-19 20:50:01,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 20:50:01,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 20:50:01,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-19 20:50:01,294 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 20:50:01,294 INFO L285 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-19 20:50:01,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:50:01 BoogieIcfgContainer [2019-11-19 20:50:01,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 20:50:01,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 20:50:01,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 20:50:01,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 20:50:01,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:50:00" (1/3) ... [2019-11-19 20:50:01,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da3006d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:50:01, skipping insertion in model container [2019-11-19 20:50:01,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:50:00" (2/3) ... [2019-11-19 20:50:01,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da3006d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:50:01, skipping insertion in model container [2019-11-19 20:50:01,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:50:01" (3/3) ... [2019-11-19 20:50:01,307 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2019-11-19 20:50:01,336 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 20:50:01,344 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 20:50:01,358 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 20:50:01,386 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 20:50:01,386 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 20:50:01,387 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 20:50:01,387 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 20:50:01,387 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 20:50:01,387 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 20:50:01,387 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 20:50:01,388 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 20:50:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-19 20:50:01,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 20:50:01,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:50:01,411 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:50:01,412 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:50:01,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:50:01,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1486647931, now seen corresponding path program 1 times [2019-11-19 20:50:01,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:50:01,427 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128513761] [2019-11-19 20:50:01,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:50:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:50:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 20:50:01,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128513761] [2019-11-19 20:50:01,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:50:01,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-19 20:50:01,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641337062] [2019-11-19 20:50:01,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 20:50:01,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:50:01,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 20:50:01,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 20:50:01,575 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-19 20:50:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:50:01,594 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2019-11-19 20:50:01,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 20:50:01,596 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-19 20:50:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:50:01,605 INFO L225 Difference]: With dead ends: 33 [2019-11-19 20:50:01,605 INFO L226 Difference]: Without dead ends: 15 [2019-11-19 20:50:01,609 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 [2019-11-19 20:50:01,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-19 20:50:01,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-19 20:50:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-19 20:50:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-19 20:50:01,649 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2019-11-19 20:50:01,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:50:01,649 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-19 20:50:01,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 20:50:01,649 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-19 20:50:01,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 20:50:01,650 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:50:01,650 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:50:01,650 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:50:01,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:50:01,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1772723449, now seen corresponding path program 1 times [2019-11-19 20:50:01,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:50:01,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725544331] [2019-11-19 20:50:01,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:50:01,673 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:50:01,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808504503] [2019-11-19 20:50:01,674 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 [2019-11-19 20:50:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:50:01,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-19 20:50:01,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:50:01,853 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 20:50:01,854 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 1 case distinctions, treesize of input 27 treesize of output 39 [2019-11-19 20:50:01,856 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 20:50:01,890 INFO L567 ElimStorePlain]: treesize reduction 16, result has 59.0 percent of original size [2019-11-19 20:50:01,892 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 20:50:01,893 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:7 [2019-11-19 20:50:01,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 20:50:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 20:50:01,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725544331] [2019-11-19 20:50:01,932 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:50:01,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808504503] [2019-11-19 20:50:01,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:50:01,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 20:50:01,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328308746] [2019-11-19 20:50:01,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 20:50:01,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:50:01,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 20:50:01,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-19 20:50:01,936 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2019-11-19 20:50:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:50:02,041 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-19 20:50:02,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 20:50:02,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-19 20:50:02,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:50:02,042 INFO L225 Difference]: With dead ends: 32 [2019-11-19 20:50:02,043 INFO L226 Difference]: Without dead ends: 30 [2019-11-19 20:50:02,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-19 20:50:02,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-19 20:50:02,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2019-11-19 20:50:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-19 20:50:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-19 20:50:02,052 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 10 [2019-11-19 20:50:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:50:02,053 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-19 20:50:02,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 20:50:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-19 20:50:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 20:50:02,056 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:50:02,056 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:50:02,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:50:02,260 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:50:02,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:50:02,261 INFO L82 PathProgramCache]: Analyzing trace with hash 130601367, now seen corresponding path program 1 times [2019-11-19 20:50:02,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:50:02,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132648193] [2019-11-19 20:50:02,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:50:02,304 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:50:02,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416979161] [2019-11-19 20:50:02,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:50:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:50:02,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 20:50:02,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:50:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 20:50:02,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132648193] [2019-11-19 20:50:02,389 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:50:02,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416979161] [2019-11-19 20:50:02,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:50:02,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 20:50:02,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905073204] [2019-11-19 20:50:02,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 20:50:02,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:50:02,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 20:50:02,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-19 20:50:02,393 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2019-11-19 20:50:02,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:50:02,506 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-11-19 20:50:02,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 20:50:02,507 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-19 20:50:02,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:50:02,508 INFO L225 Difference]: With dead ends: 47 [2019-11-19 20:50:02,510 INFO L226 Difference]: Without dead ends: 38 [2019-11-19 20:50:02,510 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-19 20:50:02,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-19 20:50:02,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 21. [2019-11-19 20:50:02,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-19 20:50:02,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-19 20:50:02,517 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2019-11-19 20:50:02,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:50:02,517 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-19 20:50:02,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 20:50:02,518 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-19 20:50:02,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-19 20:50:02,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:50:02,518 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:50:02,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:50:02,719 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:50:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:50:02,720 INFO L82 PathProgramCache]: Analyzing trace with hash 827904471, now seen corresponding path program 1 times [2019-11-19 20:50:02,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:50:02,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712166664] [2019-11-19 20:50:02,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:50:02,736 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:50:02,736 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391773498] [2019-11-19 20:50:02,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:50:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:50:02,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 20:50:02,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:50:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 20:50:02,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712166664] [2019-11-19 20:50:02,812 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:50:02,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391773498] [2019-11-19 20:50:02,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:50:02,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-19 20:50:02,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472011407] [2019-11-19 20:50:02,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 20:50:02,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:50:02,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 20:50:02,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-19 20:50:02,815 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2019-11-19 20:50:02,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:50:02,910 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-19 20:50:02,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 20:50:02,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-19 20:50:02,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:50:02,912 INFO L225 Difference]: With dead ends: 42 [2019-11-19 20:50:02,912 INFO L226 Difference]: Without dead ends: 35 [2019-11-19 20:50:02,913 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-19 20:50:02,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-19 20:50:02,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2019-11-19 20:50:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-19 20:50:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-19 20:50:02,925 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2019-11-19 20:50:02,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:50:02,925 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-19 20:50:02,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 20:50:02,926 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-19 20:50:02,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-19 20:50:02,928 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:50:02,929 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:50:03,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:50:03,130 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:50:03,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:50:03,131 INFO L82 PathProgramCache]: Analyzing trace with hash 437833903, now seen corresponding path program 1 times [2019-11-19 20:50:03,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:50:03,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649163471] [2019-11-19 20:50:03,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:50:03,147 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:50:03,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390104916] [2019-11-19 20:50:03,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:50:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:50:03,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 20:50:03,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:50:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 20:50:03,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649163471] [2019-11-19 20:50:03,232 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:50:03,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390104916] [2019-11-19 20:50:03,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 20:50:03,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-19 20:50:03,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266192611] [2019-11-19 20:50:03,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 20:50:03,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:50:03,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 20:50:03,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-19 20:50:03,238 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-11-19 20:50:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:50:03,331 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-11-19 20:50:03,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 20:50:03,333 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-19 20:50:03,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:50:03,334 INFO L225 Difference]: With dead ends: 39 [2019-11-19 20:50:03,334 INFO L226 Difference]: Without dead ends: 25 [2019-11-19 20:50:03,335 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-19 20:50:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-19 20:50:03,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2019-11-19 20:50:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-19 20:50:03,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-19 20:50:03,341 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2019-11-19 20:50:03,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:50:03,341 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-19 20:50:03,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 20:50:03,341 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-19 20:50:03,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-19 20:50:03,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:50:03,342 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:50:03,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:50:03,546 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:50:03,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:50:03,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1602337035, now seen corresponding path program 1 times [2019-11-19 20:50:03,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:50:03,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62793088] [2019-11-19 20:50:03,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:50:03,571 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:50:03,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059273276] [2019-11-19 20:50:03,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:50:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 20:50:03,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-19 20:50:03,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:50:03,658 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 [2019-11-19 20:50:03,660 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 20:50:03,667 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 20:50:03,674 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2019-11-19 20:50:03,674 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 20:50:03,683 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 20:50:03,684 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 20:50:03,684 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2019-11-19 20:50:03,760 INFO L343 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2019-11-19 20:50:03,761 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2019-11-19 20:50:03,764 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 20:50:03,800 INFO L567 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2019-11-19 20:50:03,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 20:50:03,805 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 20:50:03,806 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2019-11-19 20:50:03,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 20:50:03,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 20:50:03,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 20:50:03,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 20:50:03,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 20:50:03,949 INFO L392 ElimStorePlain]: Different costs {12=[v_prenex_4], 20=[|v_#memory_int_12|]} [2019-11-19 20:50:03,957 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 20:50:03,962 INFO L343 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2019-11-19 20:50:03,962 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2019-11-19 20:50:03,967 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 20:50:04,005 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 20:50:04,012 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 20:50:04,044 INFO L343 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2019-11-19 20:50:04,045 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 89 [2019-11-19 20:50:04,048 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 20:50:04,108 INFO L567 ElimStorePlain]: treesize reduction 51, result has 66.9 percent of original size [2019-11-19 20:50:04,110 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2019-11-19 20:50:04,111 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:103 [2019-11-19 20:50:04,232 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 20:50:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 20:50:04,254 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62793088] [2019-11-19 20:50:04,255 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:50:04,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059273276] [2019-11-19 20:50:04,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:50:04,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-19 20:50:04,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509989539] [2019-11-19 20:50:04,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 20:50:04,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:50:04,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 20:50:04,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-19 20:50:04,257 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2019-11-19 20:50:04,571 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2019-11-19 20:50:04,921 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2019-11-19 20:50:05,091 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2019-11-19 20:50:05,273 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2019-11-19 20:50:05,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:50:05,334 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-19 20:50:05,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 20:50:05,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-19 20:50:05,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:50:05,335 INFO L225 Difference]: With dead ends: 42 [2019-11-19 20:50:05,335 INFO L226 Difference]: Without dead ends: 40 [2019-11-19 20:50:05,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-19 20:50:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-19 20:50:05,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2019-11-19 20:50:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 20:50:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-19 20:50:05,343 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 14 [2019-11-19 20:50:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:50:05,343 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-19 20:50:05,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 20:50:05,343 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-19 20:50:05,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 20:50:05,344 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:50:05,344 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:50:05,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:50:05,548 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:50:05,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:50:05,549 INFO L82 PathProgramCache]: Analyzing trace with hash -602215277, now seen corresponding path program 2 times [2019-11-19 20:50:05,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:50:05,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225031112] [2019-11-19 20:50:05,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:50:05,575 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:50:05,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269790705] [2019-11-19 20:50:05,576 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:50:05,623 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 20:50:05,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 20:50:05,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 20:50:05,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:50:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 20:50:05,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225031112] [2019-11-19 20:50:05,663 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:50:05,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269790705] [2019-11-19 20:50:05,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:50:05,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-19 20:50:05,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127443316] [2019-11-19 20:50:05,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 20:50:05,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:50:05,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 20:50:05,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-19 20:50:05,672 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-11-19 20:50:05,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:50:05,821 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2019-11-19 20:50:05,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 20:50:05,825 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-19 20:50:05,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:50:05,826 INFO L225 Difference]: With dead ends: 59 [2019-11-19 20:50:05,826 INFO L226 Difference]: Without dead ends: 50 [2019-11-19 20:50:05,826 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-11-19 20:50:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-19 20:50:05,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 26. [2019-11-19 20:50:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-19 20:50:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-19 20:50:05,832 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 16 [2019-11-19 20:50:05,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:50:05,832 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-19 20:50:05,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 20:50:05,832 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-19 20:50:05,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 20:50:05,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:50:05,833 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:50:06,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:50:06,037 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:50:06,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:50:06,038 INFO L82 PathProgramCache]: Analyzing trace with hash -508830509, now seen corresponding path program 3 times [2019-11-19 20:50:06,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:50:06,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826687689] [2019-11-19 20:50:06,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:50:06,059 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:50:06,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883132784] [2019-11-19 20:50:06,061 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:50:06,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-19 20:50:06,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 20:50:06,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 20:50:06,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 20:50:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 20:50:06,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826687689] [2019-11-19 20:50:06,123 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-19 20:50:06,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883132784] [2019-11-19 20:50:06,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-19 20:50:06,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-19 20:50:06,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616629215] [2019-11-19 20:50:06,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 20:50:06,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 20:50:06,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 20:50:06,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-19 20:50:06,125 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2019-11-19 20:50:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 20:50:06,227 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2019-11-19 20:50:06,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 20:50:06,227 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-19 20:50:06,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 20:50:06,228 INFO L225 Difference]: With dead ends: 54 [2019-11-19 20:50:06,229 INFO L226 Difference]: Without dead ends: 47 [2019-11-19 20:50:06,229 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-19 20:50:06,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-19 20:50:06,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2019-11-19 20:50:06,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-19 20:50:06,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-11-19 20:50:06,234 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 16 [2019-11-19 20:50:06,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 20:50:06,235 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-11-19 20:50:06,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 20:50:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-11-19 20:50:06,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 20:50:06,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 20:50:06,236 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 20:50:06,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:50:06,437 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 20:50:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 20:50:06,438 INFO L82 PathProgramCache]: Analyzing trace with hash 575675563, now seen corresponding path program 1 times [2019-11-19 20:50:06,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 20:50:06,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509344064] [2019-11-19 20:50:06,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 20:50:06,449 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-19 20:50:06,450 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54112986] [2019-11-19 20:50:06,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:50:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 20:50:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 20:50:06,543 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 20:50:06,546 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 20:50:06,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 20:50:06,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:50:06 BoogieIcfgContainer [2019-11-19 20:50:06,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 20:50:06,791 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 20:50:06,791 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 20:50:06,791 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 20:50:06,791 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:50:01" (3/4) ... [2019-11-19 20:50:06,793 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 20:50:06,845 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-19 20:50:06,845 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 20:50:06,850 INFO L168 Benchmark]: Toolchain (without parser) took 6250.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -130.8 MB). Peak memory consumption was 35.4 MB. Max. memory is 11.5 GB. [2019-11-19 20:50:06,850 INFO L168 Benchmark]: CDTParser took 0.27 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. [2019-11-19 20:50:06,851 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.80 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-19 20:50:06,852 INFO L168 Benchmark]: Boogie Procedure Inliner took 108.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.3 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -131.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-19 20:50:06,852 INFO L168 Benchmark]: Boogie Preprocessor took 25.65 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: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-11-19 20:50:06,854 INFO L168 Benchmark]: RCFGBuilder took 298.61 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. [2019-11-19 20:50:06,854 INFO L168 Benchmark]: TraceAbstraction took 5493.47 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 83.9 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -42.7 MB). Peak memory consumption was 41.2 MB. Max. memory is 11.5 GB. [2019-11-19 20:50:06,855 INFO L168 Benchmark]: Witness Printer took 54.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 20:50:06,863 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 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 261.80 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 108.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 82.3 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -131.3 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.65 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: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 298.61 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5493.47 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 83.9 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -42.7 MB). Peak memory consumption was 41.2 MB. Max. memory is 11.5 GB. * Witness Printer took 54.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long *a = malloc(sizeof(long long)*N); [L24] long long *b = malloc(sizeof(long long)*N); [L26] a[0] = 8 [L27] b[0] = 1 [L29] i=1 VAL [N=2] [L29] COND TRUE i