./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/ps2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/ps2.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 f6fd7af8734f94331b50b8b567956ca627ccf241 ............................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 01:12:56,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:12:56,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:12:56,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:12:56,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:12:56,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:12:56,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:12:56,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:12:56,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:12:56,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:12:56,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:12:56,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:12:56,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:12:56,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:12:56,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:12:56,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:12:56,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:12:56,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:12:56,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:12:56,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:12:56,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:12:56,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:12:56,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:12:56,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:12:56,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:12:56,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:12:56,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:12:56,674 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:12:56,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:12:56,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:12:56,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:12:56,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:12:56,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:12:56,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:12:56,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:12:56,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:12:56,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:12:56,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:12:56,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:12:56,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:12:56,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:12:56,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:12:56,734 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:12:56,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:12:56,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:12:56,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:12:56,737 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:12:56,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:12:56,738 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:12:56,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:12:56,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:12:56,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:12:56,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:12:56,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:12:56,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:12:56,740 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:12:56,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:12:56,741 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:12:56,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:12:56,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:12:56,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:12:56,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:12:56,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:12:56,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:12:56,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:12:56,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:12:56,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:12:56,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:12:56,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:12:56,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:12:56,744 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:12:56,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(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 -> f6fd7af8734f94331b50b8b567956ca627ccf241 [2020-10-20 01:12:56,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:12:56,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:12:56,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:12:56,991 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:12:56,991 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:12:56,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/ps2.c [2020-10-20 01:12:57,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/576823f57/18211a993dd24ba88df4ef80d7f47489/FLAG0b35ba8ad [2020-10-20 01:12:57,548 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:12:57,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/ps2.c [2020-10-20 01:12:57,554 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/576823f57/18211a993dd24ba88df4ef80d7f47489/FLAG0b35ba8ad [2020-10-20 01:12:57,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/576823f57/18211a993dd24ba88df4ef80d7f47489 [2020-10-20 01:12:57,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:12:57,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:12:57,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:12:57,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:12:57,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:12:57,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:12:57" (1/1) ... [2020-10-20 01:12:57,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46734943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:12:57, skipping insertion in model container [2020-10-20 01:12:57,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:12:57" (1/1) ... [2020-10-20 01:12:57,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:12:58,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:12:58,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:12:58,262 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:12:58,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:12:58,326 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:12:58,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:12:58 WrapperNode [2020-10-20 01:12:58,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:12:58,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:12:58,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:12:58,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:12:58,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:12:58" (1/1) ... [2020-10-20 01:12:58,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:12:58" (1/1) ... [2020-10-20 01:12:58,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:12:58,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:12:58,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:12:58,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:12:58,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:12:58" (1/1) ... [2020-10-20 01:12:58,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:12:58" (1/1) ... [2020-10-20 01:12:58,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:12:58" (1/1) ... [2020-10-20 01:12:58,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:12:58" (1/1) ... [2020-10-20 01:12:58,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:12:58" (1/1) ... [2020-10-20 01:12:58,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:12:58" (1/1) ... [2020-10-20 01:12:58,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:12:58" (1/1) ... [2020-10-20 01:12:58,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:12:58,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:12:58,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:12:58,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:12:58,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:12:58" (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 [2020-10-20 01:12:58,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:12:58,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:12:58,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:12:58,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:12:58,707 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:12:58,707 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-20 01:12:58,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:12:58 BoogieIcfgContainer [2020-10-20 01:12:58,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:12:58,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:12:58,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:12:58,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:12:58,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:12:57" (1/3) ... [2020-10-20 01:12:58,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e481528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:12:58, skipping insertion in model container [2020-10-20 01:12:58,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:12:58" (2/3) ... [2020-10-20 01:12:58,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e481528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:12:58, skipping insertion in model container [2020-10-20 01:12:58,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:12:58" (3/3) ... [2020-10-20 01:12:58,721 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2.c [2020-10-20 01:12:58,736 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:12:58,744 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 01:12:58,762 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-20 01:12:58,791 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:12:58,792 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:12:58,792 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:12:58,792 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:12:58,793 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:12:58,793 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:12:58,793 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:12:58,793 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:12:58,818 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-10-20 01:12:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-10-20 01:12:58,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:12:58,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-10-20 01:12:58,830 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:12:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:12:58,838 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2020-10-20 01:12:58,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:12:58,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646669587] [2020-10-20 01:12:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:12:58,944 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-20 01:12:58,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072828872] [2020-10-20 01:12:58,945 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 [2020-10-20 01:12:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:12:59,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 01:12:59,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:12:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:12:59,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646669587] [2020-10-20 01:12:59,113 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-20 01:12:59,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072828872] [2020-10-20 01:12:59,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:12:59,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 01:12:59,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651067027] [2020-10-20 01:12:59,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 01:12:59,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:12:59,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 01:12:59,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 01:12:59,139 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 4 states. [2020-10-20 01:12:59,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:12:59,214 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-10-20 01:12:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:12:59,216 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-10-20 01:12:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:12:59,227 INFO L225 Difference]: With dead ends: 38 [2020-10-20 01:12:59,227 INFO L226 Difference]: Without dead ends: 15 [2020-10-20 01:12:59,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:12:59,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-20 01:12:59,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-10-20 01:12:59,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-20 01:12:59,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-20 01:12:59,271 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 5 [2020-10-20 01:12:59,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:12:59,271 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-20 01:12:59,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 01:12:59,272 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-20 01:12:59,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 01:12:59,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:12:59,273 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-10-20 01:12:59,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-10-20 01:12:59,487 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:12:59,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:12:59,487 INFO L82 PathProgramCache]: Analyzing trace with hash 301759358, now seen corresponding path program 1 times [2020-10-20 01:12:59,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:12:59,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583671324] [2020-10-20 01:12:59,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:12:59,504 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-20 01:12:59,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868544286] [2020-10-20 01:12:59,504 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 [2020-10-20 01:12:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:12:59,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 01:12:59,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:12:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:12:59,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583671324] [2020-10-20 01:12:59,654 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-20 01:12:59,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868544286] [2020-10-20 01:12:59,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-20 01:12:59,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-20 01:12:59,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250051225] [2020-10-20 01:12:59,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:12:59,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:12:59,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:12:59,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:12:59,661 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-20 01:12:59,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:12:59,750 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-20 01:12:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 01:12:59,752 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-20 01:12:59,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:12:59,753 INFO L225 Difference]: With dead ends: 24 [2020-10-20 01:12:59,753 INFO L226 Difference]: Without dead ends: 18 [2020-10-20 01:12:59,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:12:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-20 01:12:59,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-20 01:12:59,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-20 01:12:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-20 01:12:59,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 8 [2020-10-20 01:12:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:12:59,763 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-20 01:12:59,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:12:59,765 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-20 01:12:59,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 01:12:59,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:12:59,767 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2020-10-20 01:12:59,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:12:59,981 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:12:59,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:12:59,982 INFO L82 PathProgramCache]: Analyzing trace with hash 352363498, now seen corresponding path program 2 times [2020-10-20 01:12:59,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:12:59,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184058534] [2020-10-20 01:12:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:13:00,002 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-20 01:13:00,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525146686] [2020-10-20 01:13:00,003 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 [2020-10-20 01:13:00,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:13:00,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:13:00,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 01:13:00,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:13:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:13:00,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184058534] [2020-10-20 01:13:00,113 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-20 01:13:00,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525146686] [2020-10-20 01:13:00,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-20 01:13:00,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-20 01:13:00,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344528389] [2020-10-20 01:13:00,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 01:13:00,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:13:00,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 01:13:00,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:13:00,116 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-20 01:13:00,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:13:00,216 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-20 01:13:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:13:00,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-20 01:13:00,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:13:00,224 INFO L225 Difference]: With dead ends: 27 [2020-10-20 01:13:00,224 INFO L226 Difference]: Without dead ends: 21 [2020-10-20 01:13:00,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:13:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-20 01:13:00,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-20 01:13:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 01:13:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-20 01:13:00,230 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2020-10-20 01:13:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:13:00,230 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-20 01:13:00,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 01:13:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-20 01:13:00,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 01:13:00,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:13:00,231 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1] [2020-10-20 01:13:00,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:13:00,445 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:13:00,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:13:00,446 INFO L82 PathProgramCache]: Analyzing trace with hash 366777342, now seen corresponding path program 3 times [2020-10-20 01:13:00,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:13:00,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663976460] [2020-10-20 01:13:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:13:00,462 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-20 01:13:00,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682057160] [2020-10-20 01:13:00,463 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 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 [2020-10-20 01:13:00,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-20 01:13:00,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:13:00,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 01:13:00,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:13:00,563 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-20 01:13:00,564 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:13:00,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:13:00,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:13:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 01:13:00,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663976460] [2020-10-20 01:13:00,634 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-20 01:13:00,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682057160] [2020-10-20 01:13:00,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-20 01:13:00,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-20 01:13:00,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380915276] [2020-10-20 01:13:00,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:13:00,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:13:00,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:13:00,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:13:00,637 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 5 states. [2020-10-20 01:13:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:13:00,686 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-20 01:13:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 01:13:00,687 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-20 01:13:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:13:00,688 INFO L225 Difference]: With dead ends: 20 [2020-10-20 01:13:00,688 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 01:13:00,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:13:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 01:13:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 01:13:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 01:13:00,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 01:13:00,689 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-10-20 01:13:00,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:13:00,690 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 01:13:00,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:13:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 01:13:00,690 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 01:13:00,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:13:00,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 01:13:00,977 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 01:13:00,977 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 01:13:00,978 INFO L270 CegarLoopResult]: At program point L25-2(lines 25 34) the Hoare annotation is: (let ((.cse0 (= (* ULTIMATE.start_main_~x~0 2) (+ (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0)))) (or (and (= ULTIMATE.start_main_~y~0 0) .cse0) (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0))) [2020-10-20 01:13:00,978 INFO L274 CegarLoopResult]: For program point L25-3(lines 25 34) no Hoare annotation was computed. [2020-10-20 01:13:00,978 INFO L274 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-10-20 01:13:00,979 INFO L274 CegarLoopResult]: For program point L11-1(lines 11 12) no Hoare annotation was computed. [2020-10-20 01:13:00,979 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 01:13:00,979 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 01:13:00,979 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 01:13:00,979 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-20 01:13:00,979 INFO L274 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-10-20 01:13:00,980 INFO L270 CegarLoopResult]: At program point L10-1(lines 28 29) the Hoare annotation is: (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (* ULTIMATE.start_main_~x~0 2) (+ (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0))) [2020-10-20 01:13:00,980 INFO L274 CegarLoopResult]: For program point L10-2(lines 10 13) no Hoare annotation was computed. [2020-10-20 01:13:00,980 INFO L277 CegarLoopResult]: At program point L10-3(lines 9 15) the Hoare annotation is: true [2020-10-20 01:13:00,980 INFO L277 CegarLoopResult]: At program point L37(lines 17 38) the Hoare annotation is: true [2020-10-20 01:13:01,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:13:01 BoogieIcfgContainer [2020-10-20 01:13:01,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:13:01,010 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:13:01,010 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:13:01,010 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:13:01,011 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:12:58" (3/4) ... [2020-10-20 01:13:01,015 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 01:13:01,028 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-10-20 01:13:01,029 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-10-20 01:13:01,033 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 01:13:01,033 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:13:01,033 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:13:01,089 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:13:01,089 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:13:01,091 INFO L168 Benchmark]: Toolchain (without parser) took 3121.98 ms. Allocated memory was 41.4 MB in the beginning and 48.8 MB in the end (delta: 7.3 MB). Free memory was 22.1 MB in the beginning and 21.4 MB in the end (delta: 745.9 kB). Peak memory consumption was 8.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:13:01,092 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 31.5 MB. Free memory was 10.1 MB in the beginning and 10.0 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. [2020-10-20 01:13:01,093 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.51 ms. Allocated memory was 41.4 MB in the beginning and 41.9 MB in the end (delta: 524.3 kB). Free memory was 21.3 MB in the beginning and 23.9 MB in the end (delta: -2.6 MB). Peak memory consumption was 12.0 MB. Max. memory is 14.3 GB. [2020-10-20 01:13:01,094 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.67 ms. Allocated memory is still 41.9 MB. Free memory was 23.9 MB in the beginning and 22.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:13:01,094 INFO L168 Benchmark]: Boogie Preprocessor took 27.63 ms. Allocated memory is still 41.9 MB. Free memory was 22.2 MB in the beginning and 21.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:13:01,095 INFO L168 Benchmark]: RCFGBuilder took 314.56 ms. Allocated memory was 41.9 MB in the beginning and 44.6 MB in the end (delta: 2.6 MB). Free memory was 20.8 MB in the beginning and 26.7 MB in the end (delta: -5.9 MB). Peak memory consumption was 11.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:13:01,096 INFO L168 Benchmark]: TraceAbstraction took 2298.09 ms. Allocated memory was 44.6 MB in the beginning and 48.8 MB in the end (delta: 4.2 MB). Free memory was 26.2 MB in the beginning and 24.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 6.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:13:01,096 INFO L168 Benchmark]: Witness Printer took 79.08 ms. Allocated memory is still 48.8 MB. Free memory was 24.3 MB in the beginning and 21.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. [2020-10-20 01:13:01,101 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 31.5 MB. Free memory was 10.1 MB in the beginning and 10.0 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 353.51 ms. Allocated memory was 41.4 MB in the beginning and 41.9 MB in the end (delta: 524.3 kB). Free memory was 21.3 MB in the beginning and 23.9 MB in the end (delta: -2.6 MB). Peak memory consumption was 12.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 37.67 ms. Allocated memory is still 41.9 MB. Free memory was 23.9 MB in the beginning and 22.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 27.63 ms. Allocated memory is still 41.9 MB. Free memory was 22.2 MB in the beginning and 21.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 314.56 ms. Allocated memory was 41.9 MB in the beginning and 44.6 MB in the end (delta: 2.6 MB). Free memory was 20.8 MB in the beginning and 26.7 MB in the end (delta: -5.9 MB). Peak memory consumption was 11.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 2298.09 ms. Allocated memory was 44.6 MB in the beginning and 48.8 MB in the end (delta: 4.2 MB). Free memory was 26.2 MB in the beginning and 24.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 6.1 MB. Max. memory is 14.3 GB. * Witness Printer took 79.08 ms. Allocated memory is still 48.8 MB. Free memory was 24.3 MB in the beginning and 21.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. * 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 - 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 2 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (y == 0 && x * 2 == y * y + y) || (1 == cond && x * 2 == y * y + y) - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 == cond && x * 2 == y * y + y - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.1s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 30 SDslu, 66 SDs, 0 SdLazy, 82 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 16 NumberOfFragments, 42 HoareAnnotationTreeSize, 4 FomulaSimplifications, 121 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 38 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 1593 SizeOfPredicates, 18 NumberOfNonLiveVariables, 300 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 14/24 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...