./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test22-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/ldv-regression/test22-1.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a3b319f31812cf6dfaa3cae4a89a0875c72839a3 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 22:05:09,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:05:09,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:05:09,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:05:09,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:05:09,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:05:09,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:05:09,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:05:09,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:05:09,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:05:09,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:05:09,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:05:09,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:05:09,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:05:09,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:05:09,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:05:09,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:05:09,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:05:09,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:05:09,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:05:09,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:05:09,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:05:09,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:05:09,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:05:09,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:05:09,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:05:09,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:05:09,529 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:05:09,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:05:09,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:05:09,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:05:09,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:05:09,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:05:09,541 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:05:09,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:05:09,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:05:09,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:05:09,548 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:05:09,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:05:09,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:05:09,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:05:09,552 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:05:09,612 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:05:09,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:05:09,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:05:09,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:05:09,615 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:05:09,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:05:09,616 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:05:09,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:05:09,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:05:09,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:05:09,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:05:09,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:05:09,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:05:09,618 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:05:09,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:05:09,618 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:05:09,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:05:09,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:05:09,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:05:09,619 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:05:09,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:05:09,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:05:09,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:05:09,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:05:09,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:05:09,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:05:09,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:05:09,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:05:09,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:05:09,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3b319f31812cf6dfaa3cae4a89a0875c72839a3 [2020-10-25 22:05:10,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:05:10,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:05:10,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:05:10,056 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:05:10,057 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:05:10,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test22-1.c [2020-10-25 22:05:10,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dcd6afe1/b222272acfb34f2781909b6eba5e1ec0/FLAGfaa905d87 [2020-10-25 22:05:10,712 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:05:10,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test22-1.c [2020-10-25 22:05:10,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dcd6afe1/b222272acfb34f2781909b6eba5e1ec0/FLAGfaa905d87 [2020-10-25 22:05:11,054 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dcd6afe1/b222272acfb34f2781909b6eba5e1ec0 [2020-10-25 22:05:11,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:05:11,065 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:05:11,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:05:11,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:05:11,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:05:11,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:05:11" (1/1) ... [2020-10-25 22:05:11,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54828150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:11, skipping insertion in model container [2020-10-25 22:05:11,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:05:11" (1/1) ... [2020-10-25 22:05:11,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:05:11,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:05:11,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:05:11,350 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:05:11,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:05:11,392 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:05:11,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:11 WrapperNode [2020-10-25 22:05:11,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:05:11,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:05:11,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:05:11,395 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:05:11,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:11" (1/1) ... [2020-10-25 22:05:11,413 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:11" (1/1) ... [2020-10-25 22:05:11,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:05:11,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:05:11,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:05:11,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:05:11,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:11" (1/1) ... [2020-10-25 22:05:11,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:11" (1/1) ... [2020-10-25 22:05:11,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:11" (1/1) ... [2020-10-25 22:05:11,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:11" (1/1) ... [2020-10-25 22:05:11,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:11" (1/1) ... [2020-10-25 22:05:11,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:11" (1/1) ... [2020-10-25 22:05:11,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:11" (1/1) ... [2020-10-25 22:05:11,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:05:11,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:05:11,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:05:11,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:05:11,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:11" (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 [2020-10-25 22:05:11,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:05:11,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:05:11,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 22:05:11,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:05:11,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:05:11,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 22:05:12,192 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:05:12,193 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-10-25 22:05:12,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:05:12 BoogieIcfgContainer [2020-10-25 22:05:12,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:05:12,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:05:12,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:05:12,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:05:12,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:05:11" (1/3) ... [2020-10-25 22:05:12,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44253b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:05:12, skipping insertion in model container [2020-10-25 22:05:12,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:05:11" (2/3) ... [2020-10-25 22:05:12,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44253b14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:05:12, skipping insertion in model container [2020-10-25 22:05:12,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:05:12" (3/3) ... [2020-10-25 22:05:12,206 INFO L111 eAbstractionObserver]: Analyzing ICFG test22-1.c [2020-10-25 22:05:12,222 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:05:12,229 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:05:12,245 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:05:12,275 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:05:12,276 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:05:12,276 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:05:12,281 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:05:12,282 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:05:12,282 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:05:12,282 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:05:12,282 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:05:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-25 22:05:12,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 22:05:12,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:12,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:12,308 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:12,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:12,315 INFO L82 PathProgramCache]: Analyzing trace with hash 164664103, now seen corresponding path program 1 times [2020-10-25 22:05:12,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:12,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901861693] [2020-10-25 22:05:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:12,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901861693] [2020-10-25 22:05:12,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:05:12,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 22:05:12,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773968123] [2020-10-25 22:05:12,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:05:12,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:12,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:05:12,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:05:12,591 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-10-25 22:05:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:12,611 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-25 22:05:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:05:12,613 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2020-10-25 22:05:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:12,624 INFO L225 Difference]: With dead ends: 35 [2020-10-25 22:05:12,625 INFO L226 Difference]: Without dead ends: 21 [2020-10-25 22:05:12,628 INFO L677 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 [2020-10-25 22:05:12,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-25 22:05:12,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-25 22:05:12,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-25 22:05:12,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-10-25 22:05:12,669 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 19 [2020-10-25 22:05:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:12,670 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-10-25 22:05:12,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:05:12,670 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-10-25 22:05:12,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-25 22:05:12,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:12,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:12,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:05:12,672 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:12,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:12,674 INFO L82 PathProgramCache]: Analyzing trace with hash 603612068, now seen corresponding path program 1 times [2020-10-25 22:05:12,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:12,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537047493] [2020-10-25 22:05:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:12,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537047493] [2020-10-25 22:05:12,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:05:12,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-25 22:05:12,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474236588] [2020-10-25 22:05:12,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 22:05:12,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:12,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 22:05:12,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-25 22:05:12,991 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 10 states. [2020-10-25 22:05:13,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:13,906 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2020-10-25 22:05:13,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-25 22:05:13,907 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-25 22:05:13,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:13,909 INFO L225 Difference]: With dead ends: 96 [2020-10-25 22:05:13,910 INFO L226 Difference]: Without dead ends: 91 [2020-10-25 22:05:13,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-10-25 22:05:13,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-25 22:05:13,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 33. [2020-10-25 22:05:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-25 22:05:13,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-25 22:05:13,923 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2020-10-25 22:05:13,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:13,923 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-25 22:05:13,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 22:05:13,924 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-25 22:05:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-25 22:05:13,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:13,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:13,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:05:13,925 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:13,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:13,926 INFO L82 PathProgramCache]: Analyzing trace with hash -407505182, now seen corresponding path program 1 times [2020-10-25 22:05:13,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:13,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487889925] [2020-10-25 22:05:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:14,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487889925] [2020-10-25 22:05:14,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:05:14,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-25 22:05:14,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966821789] [2020-10-25 22:05:14,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 22:05:14,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:14,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 22:05:14,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-25 22:05:14,133 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 10 states. [2020-10-25 22:05:14,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:14,914 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-10-25 22:05:14,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-25 22:05:14,914 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-25 22:05:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:14,916 INFO L225 Difference]: With dead ends: 91 [2020-10-25 22:05:14,916 INFO L226 Difference]: Without dead ends: 66 [2020-10-25 22:05:14,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2020-10-25 22:05:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-25 22:05:14,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 33. [2020-10-25 22:05:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-25 22:05:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-25 22:05:14,926 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2020-10-25 22:05:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:14,927 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-25 22:05:14,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 22:05:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-25 22:05:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-25 22:05:14,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:14,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:14,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 22:05:14,928 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:14,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:14,929 INFO L82 PathProgramCache]: Analyzing trace with hash -984735834, now seen corresponding path program 1 times [2020-10-25 22:05:14,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:14,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227534733] [2020-10-25 22:05:14,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:15,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227534733] [2020-10-25 22:05:15,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:05:15,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-25 22:05:15,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868071781] [2020-10-25 22:05:15,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 22:05:15,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:15,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 22:05:15,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-25 22:05:15,051 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 10 states. [2020-10-25 22:05:15,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:15,523 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-10-25 22:05:15,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-25 22:05:15,523 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-25 22:05:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:15,524 INFO L225 Difference]: With dead ends: 81 [2020-10-25 22:05:15,525 INFO L226 Difference]: Without dead ends: 64 [2020-10-25 22:05:15,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2020-10-25 22:05:15,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-25 22:05:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2020-10-25 22:05:15,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-25 22:05:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-25 22:05:15,534 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 20 [2020-10-25 22:05:15,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:15,534 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-25 22:05:15,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 22:05:15,534 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-25 22:05:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-25 22:05:15,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:15,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:15,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-25 22:05:15,536 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:15,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:15,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1995853084, now seen corresponding path program 1 times [2020-10-25 22:05:15,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:15,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785664741] [2020-10-25 22:05:15,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:15,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785664741] [2020-10-25 22:05:15,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:05:15,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-25 22:05:15,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743420052] [2020-10-25 22:05:15,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 22:05:15,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:15,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 22:05:15,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-25 22:05:15,688 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2020-10-25 22:05:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:16,211 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-10-25 22:05:16,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-25 22:05:16,212 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-25 22:05:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:16,213 INFO L225 Difference]: With dead ends: 73 [2020-10-25 22:05:16,213 INFO L226 Difference]: Without dead ends: 68 [2020-10-25 22:05:16,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-10-25 22:05:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-25 22:05:16,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 26. [2020-10-25 22:05:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-25 22:05:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-25 22:05:16,232 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2020-10-25 22:05:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:16,233 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-25 22:05:16,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 22:05:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-25 22:05:16,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-25 22:05:16,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:16,235 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:16,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-25 22:05:16,235 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:16,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:16,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1760411593, now seen corresponding path program 1 times [2020-10-25 22:05:16,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:16,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394529629] [2020-10-25 22:05:16,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:16,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394529629] [2020-10-25 22:05:16,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082596607] [2020-10-25 22:05:16,418 INFO L95 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 [2020-10-25 22:05:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:16,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-25 22:05:16,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:17,180 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 17 treesize of output 9 [2020-10-25 22:05:17,185 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 22:05:17,192 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 22:05:17,193 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-25 22:05:17,193 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2020-10-25 22:05:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:17,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:17,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2020-10-25 22:05:17,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112416510] [2020-10-25 22:05:17,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-25 22:05:17,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:17,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-25 22:05:17,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-10-25 22:05:17,256 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 23 states. [2020-10-25 22:05:18,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:18,836 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-10-25 22:05:18,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-25 22:05:18,838 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2020-10-25 22:05:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:18,839 INFO L225 Difference]: With dead ends: 77 [2020-10-25 22:05:18,842 INFO L226 Difference]: Without dead ends: 72 [2020-10-25 22:05:18,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2020-10-25 22:05:18,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-25 22:05:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 35. [2020-10-25 22:05:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-25 22:05:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-25 22:05:18,865 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 22 [2020-10-25 22:05:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:18,865 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-25 22:05:18,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-25 22:05:18,867 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-25 22:05:18,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-25 22:05:18,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:18,868 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:19,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-25 22:05:19,070 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:19,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:19,072 INFO L82 PathProgramCache]: Analyzing trace with hash -949600503, now seen corresponding path program 1 times [2020-10-25 22:05:19,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:19,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366145365] [2020-10-25 22:05:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:19,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366145365] [2020-10-25 22:05:19,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624822329] [2020-10-25 22:05:19,282 INFO L95 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 [2020-10-25 22:05:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:19,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-25 22:05:19,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:19,757 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 17 treesize of output 9 [2020-10-25 22:05:19,758 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 22:05:19,764 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 22:05:19,768 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-25 22:05:19,768 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:5 [2020-10-25 22:05:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:19,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:19,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2020-10-25 22:05:19,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943482174] [2020-10-25 22:05:19,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-25 22:05:19,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:19,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-25 22:05:19,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-25 22:05:19,786 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 22 states. [2020-10-25 22:05:21,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:21,465 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2020-10-25 22:05:21,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-25 22:05:21,466 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2020-10-25 22:05:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:21,467 INFO L225 Difference]: With dead ends: 81 [2020-10-25 22:05:21,467 INFO L226 Difference]: Without dead ends: 76 [2020-10-25 22:05:21,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=347, Invalid=1375, Unknown=0, NotChecked=0, Total=1722 [2020-10-25 22:05:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-25 22:05:21,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 28. [2020-10-25 22:05:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 22:05:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-25 22:05:21,477 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2020-10-25 22:05:21,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:21,478 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-25 22:05:21,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-25 22:05:21,478 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-25 22:05:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-25 22:05:21,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:21,479 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:21,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:21,694 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:21,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:21,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1048225454, now seen corresponding path program 2 times [2020-10-25 22:05:21,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:21,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154042018] [2020-10-25 22:05:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:21,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154042018] [2020-10-25 22:05:21,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043359451] [2020-10-25 22:05:21,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-25 22:05:21,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:05:21,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:21,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-25 22:05:21,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:22,261 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 9 [2020-10-25 22:05:22,263 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 22:05:22,265 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 22:05:22,265 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-25 22:05:22,266 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2020-10-25 22:05:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:22,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:22,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-10-25 22:05:22,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109327019] [2020-10-25 22:05:22,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-25 22:05:22,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:22,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-25 22:05:22,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-10-25 22:05:22,283 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 22 states. [2020-10-25 22:05:23,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:23,427 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2020-10-25 22:05:23,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-25 22:05:23,428 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-10-25 22:05:23,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:23,429 INFO L225 Difference]: With dead ends: 85 [2020-10-25 22:05:23,429 INFO L226 Difference]: Without dead ends: 80 [2020-10-25 22:05:23,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=341, Invalid=1141, Unknown=0, NotChecked=0, Total=1482 [2020-10-25 22:05:23,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-25 22:05:23,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 37. [2020-10-25 22:05:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-25 22:05:23,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-25 22:05:23,452 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 24 [2020-10-25 22:05:23,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:23,453 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-25 22:05:23,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-25 22:05:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-25 22:05:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-25 22:05:23,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:23,456 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:23,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:23,672 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:23,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:23,673 INFO L82 PathProgramCache]: Analyzing trace with hash -523217426, now seen corresponding path program 2 times [2020-10-25 22:05:23,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:23,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576292411] [2020-10-25 22:05:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:23,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576292411] [2020-10-25 22:05:23,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984399842] [2020-10-25 22:05:23,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-25 22:05:23,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:05:23,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:23,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-25 22:05:23,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:24,361 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 9 [2020-10-25 22:05:24,362 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-25 22:05:24,366 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-25 22:05:24,366 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-25 22:05:24,366 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2020-10-25 22:05:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:24,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:24,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-10-25 22:05:24,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088079037] [2020-10-25 22:05:24,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-25 22:05:24,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:24,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-25 22:05:24,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2020-10-25 22:05:24,380 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 22 states. [2020-10-25 22:05:25,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:25,599 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-10-25 22:05:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-25 22:05:25,600 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-10-25 22:05:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:25,601 INFO L225 Difference]: With dead ends: 89 [2020-10-25 22:05:25,601 INFO L226 Difference]: Without dead ends: 84 [2020-10-25 22:05:25,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=341, Invalid=1141, Unknown=0, NotChecked=0, Total=1482 [2020-10-25 22:05:25,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-25 22:05:25,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 30. [2020-10-25 22:05:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-25 22:05:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-25 22:05:25,611 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2020-10-25 22:05:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:25,611 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-25 22:05:25,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-25 22:05:25,612 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-25 22:05:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-25 22:05:25,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:25,613 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:25,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:25,828 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:25,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash -462854061, now seen corresponding path program 3 times [2020-10-25 22:05:25,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:25,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721564547] [2020-10-25 22:05:25,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:26,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721564547] [2020-10-25 22:05:26,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191239974] [2020-10-25 22:05:26,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-25 22:05:26,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-25 22:05:26,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:26,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 50 conjunts are in the unsatisfiable core [2020-10-25 22:05:26,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:26,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:05:26,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 22:05:26,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:26,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2020-10-25 22:05:26,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538371388] [2020-10-25 22:05:26,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-25 22:05:26,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:26,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-25 22:05:26,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2020-10-25 22:05:26,641 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 27 states. [2020-10-25 22:05:29,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:29,516 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2020-10-25 22:05:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-25 22:05:29,516 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2020-10-25 22:05:29,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:29,517 INFO L225 Difference]: With dead ends: 89 [2020-10-25 22:05:29,517 INFO L226 Difference]: Without dead ends: 44 [2020-10-25 22:05:29,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=673, Invalid=2633, Unknown=0, NotChecked=0, Total=3306 [2020-10-25 22:05:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-25 22:05:29,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 27. [2020-10-25 22:05:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-25 22:05:29,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-25 22:05:29,526 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 26 [2020-10-25 22:05:29,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:29,526 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-25 22:05:29,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-25 22:05:29,527 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-25 22:05:29,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-25 22:05:29,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:05:29,528 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:05:29,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-25 22:05:29,743 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:05:29,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:05:29,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1209026451, now seen corresponding path program 3 times [2020-10-25 22:05:29,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:05:29,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484416189] [2020-10-25 22:05:29,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:05:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:05:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:05:29,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484416189] [2020-10-25 22:05:29,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249309855] [2020-10-25 22:05:29,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-25 22:05:30,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-25 22:05:30,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:05:30,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 50 conjunts are in the unsatisfiable core [2020-10-25 22:05:30,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:05:30,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:05:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 22:05:30,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:05:30,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2020-10-25 22:05:30,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881437156] [2020-10-25 22:05:30,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-25 22:05:30,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:05:30,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-25 22:05:30,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2020-10-25 22:05:30,510 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 27 states. [2020-10-25 22:05:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:05:33,296 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-25 22:05:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-25 22:05:33,296 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2020-10-25 22:05:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:05:33,296 INFO L225 Difference]: With dead ends: 49 [2020-10-25 22:05:33,297 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 22:05:33,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=673, Invalid=2633, Unknown=0, NotChecked=0, Total=3306 [2020-10-25 22:05:33,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 22:05:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 22:05:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 22:05:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 22:05:33,299 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-10-25 22:05:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:05:33,300 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 22:05:33,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-25 22:05:33,300 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 22:05:33,300 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 22:05:33,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:05:33,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 22:05:34,285 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 167 [2020-10-25 22:05:34,511 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-10-25 22:05:35,779 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 166 DAG size of output: 35 [2020-10-25 22:05:36,060 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-10-25 22:05:36,374 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2020-10-25 22:05:36,806 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 29 [2020-10-25 22:05:36,809 INFO L270 CegarLoopResult]: At program point L44(lines 33 52) the Hoare annotation is: false [2020-10-25 22:05:36,809 INFO L274 CegarLoopResult]: For program point L40-1(lines 40 42) no Hoare annotation was computed. [2020-10-25 22:05:36,810 INFO L270 CegarLoopResult]: At program point L40-3(lines 40 42) the Hoare annotation is: (let ((.cse0 (= |~#d2~0.offset| 0)) (.cse1 (not (= |~#d1~0.base| |~#d2~0.base|))) (.cse2 (= ULTIMATE.start_main_~pd1~0.base ULTIMATE.start_main_~pd2~0.base)) (.cse3 (= ULTIMATE.start_main_~pd2~0.base ULTIMATE.start_main_~pa~0.base)) (.cse5 (= ULTIMATE.start_main_~pd2~0.offset 0)) (.cse4 (= |~#d1~0.offset| 0)) (.cse6 (< ULTIMATE.start_main_~i~0 (+ (select (select |#memory_int| ULTIMATE.start_main_~pa~0.base) ULTIMATE.start_main_~pa~0.offset) 1))) (.cse7 (= ULTIMATE.start_main_~pa~0.offset 0))) (or (and .cse0 .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|) (= |~#d1~0.offset| ULTIMATE.start_main_~pd1~0.offset) .cse4 .cse5 .cse6 .cse7) (and .cse0 .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~pd1~0.base |~#d2~0.base|) (= |~#d2~0.offset| ULTIMATE.start_main_~pd1~0.offset) .cse5 .cse4 .cse6 .cse7))) [2020-10-25 22:05:36,810 INFO L274 CegarLoopResult]: For program point L40-4(lines 40 42) no Hoare annotation was computed. [2020-10-25 22:05:36,810 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-25 22:05:36,810 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 22:05:36,810 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 22:05:36,810 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 22:05:36,810 INFO L274 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-10-25 22:05:36,810 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-25 22:05:36,810 INFO L274 CegarLoopResult]: For program point L24-2(line 24) no Hoare annotation was computed. [2020-10-25 22:05:36,811 INFO L270 CegarLoopResult]: At program point L24-3(lines 22 25) the Hoare annotation is: (let ((.cse0 (= |~#d1~0.base| |ULTIMATE.start_get_dummy_#res.base|)) (.cse1 (= |~#d1~0.offset| 0))) (or (and (= |~#d2~0.offset| 0) (not (= |~#d1~0.base| |~#d2~0.base|)) .cse0 (= |~#d1~0.offset| |ULTIMATE.start_get_dummy_#res.offset|) .cse1) (and (= |ULTIMATE.start_get_dummy_#res.offset| 0) (not .cse0) (= |~#d2~0.offset| |ULTIMATE.start_get_dummy_#res.offset|) (= |ULTIMATE.start_get_dummy_#res.base| |~#d2~0.base|) .cse1))) [2020-10-25 22:05:36,811 INFO L274 CegarLoopResult]: For program point L24-4(line 24) no Hoare annotation was computed. [2020-10-25 22:05:36,811 INFO L274 CegarLoopResult]: For program point L24-6(line 24) no Hoare annotation was computed. [2020-10-25 22:05:36,811 INFO L270 CegarLoopResult]: At program point L24-7(lines 22 25) the Hoare annotation is: (or (and (= |~#d2~0.offset| 0) (or (and (not (= |~#d1~0.base| |ULTIMATE.start_get_dummy_#res.base|)) (= |~#d2~0.offset| |ULTIMATE.start_get_dummy_#res.offset|) (= |ULTIMATE.start_get_dummy_#res.base| |~#d2~0.base|) (= |~#d2~0.offset| ULTIMATE.start_main_~pd1~0.offset)) (and (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|) (not (= ULTIMATE.start_main_~pd1~0.base |~#d2~0.base|)) (= |~#d1~0.offset| ULTIMATE.start_main_~pd1~0.offset) (= |~#d1~0.offset| |ULTIMATE.start_get_dummy_#res.offset|))) (= |~#d1~0.offset| 0)) (and (not (= |~#d1~0.base| |~#d2~0.base|)) (not (= ULTIMATE.start_main_~pd1~0.base |ULTIMATE.start_get_dummy_#res.base|)))) [2020-10-25 22:05:36,811 INFO L274 CegarLoopResult]: For program point L24-8(line 24) no Hoare annotation was computed. [2020-10-25 22:05:36,811 INFO L274 CegarLoopResult]: For program point L24-10(line 24) no Hoare annotation was computed. [2020-10-25 22:05:36,811 INFO L270 CegarLoopResult]: At program point L24-11(lines 22 25) the Hoare annotation is: (or (and (= |~#d2~0.offset| 0) (let ((.cse1 (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|)) (.cse0 (= ULTIMATE.start_main_~pd2~0.offset ULTIMATE.start_main_~pd1~0.offset)) (.cse2 (= ULTIMATE.start_main_~pd1~0.base |~#d2~0.base|))) (or (and .cse0 .cse1 (= |~#d1~0.offset| ULTIMATE.start_main_~pd1~0.offset) (not .cse2)) (and (not .cse1) .cse0 .cse2 (= |~#d2~0.offset| ULTIMATE.start_main_~pd1~0.offset)))) (= |~#d1~0.offset| 0)) (and (not (= |~#d1~0.base| |~#d2~0.base|)) (not (= ULTIMATE.start_main_~pd1~0.base ULTIMATE.start_main_~pd2~0.base)))) [2020-10-25 22:05:36,811 INFO L274 CegarLoopResult]: For program point L37(line 37) no Hoare annotation was computed. [2020-10-25 22:05:36,811 INFO L274 CegarLoopResult]: For program point L37-2(lines 37 46) no Hoare annotation was computed. [2020-10-25 22:05:36,812 INFO L274 CegarLoopResult]: For program point L37-4(lines 37 46) no Hoare annotation was computed. [2020-10-25 22:05:36,812 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 22:05:36,818 INFO L270 CegarLoopResult]: At program point L29(lines 27 30) the Hoare annotation is: (let ((.cse0 (= |~#d2~0.offset| 0)) (.cse1 (not (= |~#d1~0.base| |~#d2~0.base|))) (.cse2 (<= 1 |ULTIMATE.start_check_#res|)) (.cse3 (= ULTIMATE.start_main_~pd1~0.base ULTIMATE.start_main_~pd2~0.base)) (.cse4 (= ULTIMATE.start_main_~pd2~0.base ULTIMATE.start_main_~pa~0.base)) (.cse5 (= |~#d1~0.offset| 0)) (.cse6 (= ULTIMATE.start_main_~pd2~0.offset 0)) (.cse7 (<= (select (select |#memory_int| ULTIMATE.start_main_~pd2~0.base) 0) ULTIMATE.start_main_~i~0)) (.cse8 (< ULTIMATE.start_main_~i~0 (+ (select (select |#memory_int| ULTIMATE.start_main_~pa~0.base) ULTIMATE.start_main_~pa~0.offset) 1))) (.cse9 (= ULTIMATE.start_main_~pa~0.offset 0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~pd1~0.base |~#d2~0.base|) .cse5 (= |~#d2~0.offset| ULTIMATE.start_main_~pd1~0.offset) .cse6 .cse7 .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~pd1~0.base |~#d1~0.base|) (= |~#d1~0.offset| ULTIMATE.start_main_~pd1~0.offset) .cse5 .cse6 .cse7 .cse8 .cse9))) [2020-10-25 22:05:36,818 INFO L274 CegarLoopResult]: For program point L13(lines 13 20) no Hoare annotation was computed. [2020-10-25 22:05:36,818 INFO L277 CegarLoopResult]: At program point L51(lines 32 52) the Hoare annotation is: true [2020-10-25 22:05:36,818 INFO L274 CegarLoopResult]: For program point L43(lines 43 45) no Hoare annotation was computed. [2020-10-25 22:05:36,844 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,846 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,855 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,855 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,864 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,864 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,865 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,865 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,867 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,867 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,868 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,868 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:05:36 BoogieIcfgContainer [2020-10-25 22:05:36,870 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:05:36,871 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:05:36,871 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:05:36,871 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:05:36,872 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:05:12" (3/4) ... [2020-10-25 22:05:36,875 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 22:05:36,886 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-10-25 22:05:36,887 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-10-25 22:05:36,887 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 22:05:36,887 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 22:05:36,912 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((d2 == 0 && !(d1 == d2)) && d1 == \result) && d1 == \result) && d1 == 0) || ((((\result == 0 && !(d1 == \result)) && d2 == \result) && \result == d2) && d1 == 0) [2020-10-25 22:05:36,912 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((d2 == 0 && ((((!(d1 == \result) && d2 == \result) && \result == d2) && d2 == pd1) || (((pd1 == d1 && !(pd1 == d2)) && d1 == pd1) && d1 == \result))) && d1 == 0) || (!(d1 == d2) && !(pd1 == \result)) [2020-10-25 22:05:36,913 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((((((((d2 == 0 && !(d1 == d2)) && 1 <= \result) && pd1 == pd2) && pd2 == pa) && pd1 == d2) && d1 == 0) && d2 == pd1) && pd2 == 0) && unknown-#memory_int-unknown[pd2][0] <= i) && i < unknown-#memory_int-unknown[pa][pa] + 1) && pa == 0) || (((((((((((d2 == 0 && !(d1 == d2)) && 1 <= \result) && pd1 == pd2) && pd2 == pa) && pd1 == d1) && d1 == pd1) && d1 == 0) && pd2 == 0) && unknown-#memory_int-unknown[pd2][0] <= i) && i < unknown-#memory_int-unknown[pa][pa] + 1) && pa == 0) [2020-10-25 22:05:36,939 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:05:36,939 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:05:36,941 INFO L168 Benchmark]: Toolchain (without parser) took 25881.37 ms. Allocated memory was 46.1 MB in the beginning and 151.0 MB in the end (delta: 104.9 MB). Free memory was 23.7 MB in the beginning and 116.3 MB in the end (delta: -92.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:36,941 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 46.1 MB. Free memory was 33.3 MB in the beginning and 33.3 MB in the end (delta: 37.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:05:36,942 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.82 ms. Allocated memory is still 46.1 MB. Free memory was 23.1 MB in the beginning and 26.7 MB in the end (delta: -3.6 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:36,942 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.47 ms. Allocated memory is still 46.1 MB. Free memory was 26.7 MB in the beginning and 24.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:36,943 INFO L168 Benchmark]: Boogie Preprocessor took 30.80 ms. Allocated memory is still 46.1 MB. Free memory was 24.9 MB in the beginning and 23.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:36,944 INFO L168 Benchmark]: RCFGBuilder took 723.16 ms. Allocated memory was 46.1 MB in the beginning and 58.7 MB in the end (delta: 12.6 MB). Free memory was 23.5 MB in the beginning and 30.1 MB in the end (delta: -6.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:36,944 INFO L168 Benchmark]: TraceAbstraction took 24673.45 ms. Allocated memory was 58.7 MB in the beginning and 151.0 MB in the end (delta: 92.3 MB). Free memory was 29.9 MB in the beginning and 120.5 MB in the end (delta: -90.7 MB). Peak memory consumption was 80.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:36,945 INFO L168 Benchmark]: Witness Printer took 68.42 ms. Allocated memory is still 151.0 MB. Free memory was 120.5 MB in the beginning and 116.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:05:36,949 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 46.1 MB. Free memory was 33.3 MB in the beginning and 33.3 MB in the end (delta: 37.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 326.82 ms. Allocated memory is still 46.1 MB. Free memory was 23.1 MB in the beginning and 26.7 MB in the end (delta: -3.6 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.47 ms. Allocated memory is still 46.1 MB. Free memory was 26.7 MB in the beginning and 24.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.80 ms. Allocated memory is still 46.1 MB. Free memory was 24.9 MB in the beginning and 23.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 723.16 ms. Allocated memory was 46.1 MB in the beginning and 58.7 MB in the end (delta: 12.6 MB). Free memory was 23.5 MB in the beginning and 30.1 MB in the end (delta: -6.6 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 24673.45 ms. Allocated memory was 58.7 MB in the beginning and 151.0 MB in the end (delta: 92.3 MB). Free memory was 29.9 MB in the beginning and 120.5 MB in the end (delta: -90.7 MB). Peak memory consumption was 80.5 MB. Max. memory is 16.1 GB. * Witness Printer took 68.42 ms. Allocated memory is still 151.0 MB. Free memory was 120.5 MB in the beginning and 116.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((d2 == 0 && !(d1 == d2)) && d1 == \result) && d1 == \result) && d1 == 0) || ((((\result == 0 && !(d1 == \result)) && d2 == \result) && \result == d2) && d1 == 0) - InvariantResult [Line: 40]: Loop Invariant [2020-10-25 22:05:36,961 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,962 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,963 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,963 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (((((((((d2 == 0 && !(d1 == d2)) && pd1 == pd2) && pd2 == pa) && pd1 == d1) && d1 == pd1) && d1 == 0) && pd2 == 0) && i < unknown-#memory_int-unknown[pa][pa] + 1) && pa == 0) || (((((((((d2 == 0 && !(d1 == d2)) && pd1 == pd2) && pd2 == pa) && pd1 == d2) && d2 == pd1) && pd2 == 0) && d1 == 0) && i < unknown-#memory_int-unknown[pa][pa] + 1) && pa == 0) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((d2 == 0 && ((((!(d1 == \result) && d2 == \result) && \result == d2) && d2 == pd1) || (((pd1 == d1 && !(pd1 == d2)) && d1 == pd1) && d1 == \result))) && d1 == 0) || (!(d1 == d2) && !(pd1 == \result)) - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((d2 == 0 && ((((pd2 == pd1 && pd1 == d1) && d1 == pd1) && !(pd1 == d2)) || (((!(pd1 == d1) && pd2 == pd1) && pd1 == d2) && d2 == pd1))) && d1 == 0) || (!(d1 == d2) && !(pd1 == pd2)) - InvariantResult [Line: 27]: Loop Invariant [2020-10-25 22:05:36,967 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,967 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,967 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,968 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,969 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,969 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,969 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-10-25 22:05:36,969 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (((((((((((d2 == 0 && !(d1 == d2)) && 1 <= \result) && pd1 == pd2) && pd2 == pa) && pd1 == d2) && d1 == 0) && d2 == pd1) && pd2 == 0) && unknown-#memory_int-unknown[pd2][0] <= i) && i < unknown-#memory_int-unknown[pa][pa] + 1) && pa == 0) || (((((((((((d2 == 0 && !(d1 == d2)) && 1 <= \result) && pd1 == pd2) && pd2 == pa) && pd1 == d1) && d1 == pd1) && d1 == 0) && pd2 == 0) && unknown-#memory_int-unknown[pd2][0] <= i) && i < unknown-#memory_int-unknown[pa][pa] + 1) && pa == 0) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 21.2s, OverallIterations: 11, TraceHistogramMax: 4, AutomataDifference: 14.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 266 SDtfs, 1247 SDslu, 1869 SDs, 0 SdLazy, 3017 SolverSat, 436 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 444 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 13.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 363 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 43 NumberOfFragments, 303 HoareAnnotationTreeSize, 7 FomulaSimplifications, 7400476 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 377094 FormulaSimplificationTreeSizeReductionInter, 2.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 387 NumberOfCodeBlocks, 383 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 370 ConstructedInterpolants, 0 QuantifiedInterpolants, 51292 SizeOfPredicates, 75 NumberOfNonLiveVariables, 896 ConjunctsInSsa, 238 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 18/80 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...