./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/nested9.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/nested9.i -s /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b0874b2316aff3266709463f0d72702527bf3a82 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 19:12:51,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:12:51,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:12:51,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:12:51,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:12:51,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:12:51,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:12:51,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:12:51,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:12:51,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:12:51,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:12:51,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:12:51,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:12:51,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:12:51,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:12:51,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:12:51,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:12:51,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:12:51,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:12:51,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:12:51,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:12:51,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:12:51,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:12:51,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:12:51,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:12:51,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:12:51,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:12:51,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:12:51,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:12:51,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:12:51,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:12:51,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:12:51,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:12:51,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:12:51,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:12:51,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:12:51,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:12:51,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:12:51,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:12:51,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:12:51,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:12:51,565 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 19:12:51,581 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:12:51,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:12:51,582 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:12:51,582 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:12:51,582 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:12:51,582 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:12:51,582 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 19:12:51,582 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:12:51,583 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:12:51,583 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 19:12:51,583 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 19:12:51,583 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:12:51,583 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 19:12:51,583 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 19:12:51,583 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 19:12:51,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:12:51,584 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 19:12:51,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 19:12:51,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 19:12:51,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:12:51,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 19:12:51,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:12:51,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 19:12:51,585 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 19:12:51,585 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 19:12:51,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 19:12:51,585 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:12:51,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 19:12:51,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:12:51,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:12:51,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:12:51,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:12:51,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:12:51,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 19:12:51,586 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 19:12:51,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 19:12:51,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 19:12:51,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:12:51,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:12:51,587 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0874b2316aff3266709463f0d72702527bf3a82 [2020-12-09 19:12:51,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:12:51,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:12:51,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:12:51,799 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:12:51,799 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:12:51,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/../../sv-benchmarks/c/loop-invgen/nested9.i [2020-12-09 19:12:51,839 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/data/5137a3fff/7258b7288a124c26ba4d33039d7d6e4d/FLAG7c76dc372 [2020-12-09 19:12:52,186 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:12:52,186 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/sv-benchmarks/c/loop-invgen/nested9.i [2020-12-09 19:12:52,191 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/data/5137a3fff/7258b7288a124c26ba4d33039d7d6e4d/FLAG7c76dc372 [2020-12-09 19:12:52,612 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/data/5137a3fff/7258b7288a124c26ba4d33039d7d6e4d [2020-12-09 19:12:52,614 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:12:52,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:12:52,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:12:52,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:12:52,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:12:52,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:12:52" (1/1) ... [2020-12-09 19:12:52,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3699bf05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:12:52, skipping insertion in model container [2020-12-09 19:12:52,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:12:52" (1/1) ... [2020-12-09 19:12:52,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:12:52,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:12:52,743 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/sv-benchmarks/c/loop-invgen/nested9.i[893,906] [2020-12-09 19:12:52,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:12:52,758 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:12:52,767 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/sv-benchmarks/c/loop-invgen/nested9.i[893,906] [2020-12-09 19:12:52,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:12:52,780 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:12:52,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:12:52 WrapperNode [2020-12-09 19:12:52,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:12:52,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:12:52,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:12:52,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:12:52,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:12:52" (1/1) ... [2020-12-09 19:12:52,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:12:52" (1/1) ... [2020-12-09 19:12:52,803 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:12:52,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:12:52,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:12:52,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:12:52,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:12:52" (1/1) ... [2020-12-09 19:12:52,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:12:52" (1/1) ... [2020-12-09 19:12:52,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:12:52" (1/1) ... [2020-12-09 19:12:52,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:12:52" (1/1) ... [2020-12-09 19:12:52,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:12:52" (1/1) ... [2020-12-09 19:12:52,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:12:52" (1/1) ... [2020-12-09 19:12:52,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:12:52" (1/1) ... [2020-12-09 19:12:52,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:12:52,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:12:52,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:12:52,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:12:52,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:12:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/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 [2020-12-09 19:12:52,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 19:12:52,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 19:12:52,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:12:52,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:12:53,075 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:12:53,076 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 19:12:53,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:12:53 BoogieIcfgContainer [2020-12-09 19:12:53,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:12:53,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:12:53,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:12:53,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:12:53,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:12:52" (1/3) ... [2020-12-09 19:12:53,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ffce9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:12:53, skipping insertion in model container [2020-12-09 19:12:53,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:12:52" (2/3) ... [2020-12-09 19:12:53,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ffce9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:12:53, skipping insertion in model container [2020-12-09 19:12:53,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:12:53" (3/3) ... [2020-12-09 19:12:53,085 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-12-09 19:12:53,098 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:12:53,101 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 19:12:53,111 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 19:12:53,134 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:12:53,134 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 19:12:53,135 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:12:53,135 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:12:53,135 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:12:53,135 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:12:53,135 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:12:53,135 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:12:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-09 19:12:53,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 19:12:53,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:12:53,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:12:53,152 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:12:53,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:12:53,160 INFO L82 PathProgramCache]: Analyzing trace with hash 262429726, now seen corresponding path program 1 times [2020-12-09 19:12:53,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:12:53,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408561184] [2020-12-09 19:12:53,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:12:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:12:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:12:53,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408561184] [2020-12-09 19:12:53,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:12:53,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 19:12:53,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716413863] [2020-12-09 19:12:53,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:12:53,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:12:53,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:12:53,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:12:53,371 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 6 states. [2020-12-09 19:12:53,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:12:53,489 INFO L93 Difference]: Finished difference Result 48 states and 69 transitions. [2020-12-09 19:12:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 19:12:53,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-09 19:12:53,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:12:53,503 INFO L225 Difference]: With dead ends: 48 [2020-12-09 19:12:53,503 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 19:12:53,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-09 19:12:53,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 19:12:53,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-12-09 19:12:53,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 19:12:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2020-12-09 19:12:53,535 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 10 [2020-12-09 19:12:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:12:53,535 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2020-12-09 19:12:53,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:12:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-12-09 19:12:53,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 19:12:53,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:12:53,536 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:12:53,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 19:12:53,537 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:12:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:12:53,538 INFO L82 PathProgramCache]: Analyzing trace with hash -49415795, now seen corresponding path program 1 times [2020-12-09 19:12:53,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:12:53,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287756403] [2020-12-09 19:12:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:12:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:12:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:12:53,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287756403] [2020-12-09 19:12:53,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673795396] [2020-12-09 19:12:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/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 [2020-12-09 19:12:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:12:53,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 19:12:53,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:12:53,722 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 19:12:53,728 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 19:12:53,733 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 19:12:53,738 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 19:12:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:12:53,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:12:53,763 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 19:12:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:12:53,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 19:12:53,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2020-12-09 19:12:53,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338388111] [2020-12-09 19:12:53,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 19:12:53,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:12:53,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 19:12:53,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-09 19:12:53,817 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 7 states. [2020-12-09 19:12:53,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:12:53,894 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2020-12-09 19:12:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 19:12:53,895 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-09 19:12:53,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:12:53,896 INFO L225 Difference]: With dead ends: 32 [2020-12-09 19:12:53,896 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 19:12:53,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-12-09 19:12:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 19:12:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 14. [2020-12-09 19:12:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 19:12:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-12-09 19:12:53,902 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 12 [2020-12-09 19:12:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:12:53,902 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-12-09 19:12:53,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 19:12:53,903 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-12-09 19:12:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 19:12:53,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:12:53,903 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:12:54,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 19:12:54,105 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:12:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:12:54,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1208362450, now seen corresponding path program 1 times [2020-12-09 19:12:54,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:12:54,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385730613] [2020-12-09 19:12:54,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:12:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:12:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:12:54,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385730613] [2020-12-09 19:12:54,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896929071] [2020-12-09 19:12:54,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/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 [2020-12-09 19:12:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:12:54,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 19:12:54,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:12:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 19:12:54,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:12:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 19:12:54,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 19:12:54,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [7] total 10 [2020-12-09 19:12:54,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36950573] [2020-12-09 19:12:54,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 19:12:54,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:12:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 19:12:54,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-09 19:12:54,503 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 5 states. [2020-12-09 19:12:54,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:12:54,520 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2020-12-09 19:12:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 19:12:54,521 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-09 19:12:54,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:12:54,521 INFO L225 Difference]: With dead ends: 25 [2020-12-09 19:12:54,521 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 19:12:54,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-09 19:12:54,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 19:12:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 19:12:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 19:12:54,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-09 19:12:54,525 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2020-12-09 19:12:54,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:12:54,525 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-09 19:12:54,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 19:12:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-09 19:12:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 19:12:54,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:12:54,525 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:12:54,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:12:54,727 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:12:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:12:54,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1032707587, now seen corresponding path program 1 times [2020-12-09 19:12:54,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:12:54,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662508750] [2020-12-09 19:12:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:12:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:12:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:12:54,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662508750] [2020-12-09 19:12:54,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97765019] [2020-12-09 19:12:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/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 [2020-12-09 19:12:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:12:54,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 19:12:54,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:12:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:12:54,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:12:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:12:54,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1066671544] [2020-12-09 19:12:54,935 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 19:12:54,935 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 19:12:54,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 19:12:54,943 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 19:12:54,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 19:12:55,329 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 19:12:56,062 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-09 19:12:56,365 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 64 [2020-12-09 19:12:56,640 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 19:12:56,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 19:12:56,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2020-12-09 19:12:56,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270094319] [2020-12-09 19:12:56,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 19:12:56,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:12:56,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 19:12:56,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-12-09 19:12:56,642 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 11 states. [2020-12-09 19:12:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:12:56,737 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2020-12-09 19:12:56,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 19:12:56,738 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-09 19:12:56,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:12:56,738 INFO L225 Difference]: With dead ends: 34 [2020-12-09 19:12:56,738 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 19:12:56,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2020-12-09 19:12:56,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 19:12:56,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-12-09 19:12:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 19:12:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2020-12-09 19:12:56,742 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2020-12-09 19:12:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:12:56,742 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2020-12-09 19:12:56,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 19:12:56,742 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2020-12-09 19:12:56,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 19:12:56,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:12:56,743 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:12:56,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:12:56,944 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:12:56,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:12:56,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1079546391, now seen corresponding path program 1 times [2020-12-09 19:12:56,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:12:56,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476643411] [2020-12-09 19:12:56,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:12:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:12:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 19:12:57,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476643411] [2020-12-09 19:12:57,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531565660] [2020-12-09 19:12:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/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 [2020-12-09 19:12:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:12:57,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 19:12:57,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:12:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 19:12:57,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:12:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 19:12:57,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 19:12:57,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2020-12-09 19:12:57,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873698996] [2020-12-09 19:12:57,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:12:57,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:12:57,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:12:57,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-12-09 19:12:57,130 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 6 states. [2020-12-09 19:12:57,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:12:57,160 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-12-09 19:12:57,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 19:12:57,161 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-09 19:12:57,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:12:57,161 INFO L225 Difference]: With dead ends: 38 [2020-12-09 19:12:57,161 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 19:12:57,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-12-09 19:12:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 19:12:57,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-09 19:12:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 19:12:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-09 19:12:57,166 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2020-12-09 19:12:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:12:57,166 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-09 19:12:57,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:12:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-09 19:12:57,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-09 19:12:57,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:12:57,166 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:12:57,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:12:57,368 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 19:12:57,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:12:57,369 INFO L82 PathProgramCache]: Analyzing trace with hash 805943475, now seen corresponding path program 2 times [2020-12-09 19:12:57,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:12:57,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192870797] [2020-12-09 19:12:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:12:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:12:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 19:12:57,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192870797] [2020-12-09 19:12:57,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486856158] [2020-12-09 19:12:57,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/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 [2020-12-09 19:12:57,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 19:12:57,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 19:12:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 19:12:57,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:12:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-09 19:12:57,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:12:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-09 19:12:57,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877348029] [2020-12-09 19:12:57,623 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 19:12:57,623 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 19:12:57,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 19:12:57,623 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 19:12:57,624 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 19:12:58,089 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 19:12:58,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 19:12:58,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2020-12-09 19:12:58,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120888967] [2020-12-09 19:12:58,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 19:12:58,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:12:58,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 19:12:58,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-12-09 19:12:58,093 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 12 states. [2020-12-09 19:12:58,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:12:58,195 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2020-12-09 19:12:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 19:12:58,196 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-12-09 19:12:58,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:12:58,196 INFO L225 Difference]: With dead ends: 39 [2020-12-09 19:12:58,196 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 19:12:58,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-12-09 19:12:58,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 19:12:58,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 19:12:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 19:12:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 19:12:58,198 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-12-09 19:12:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:12:58,198 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 19:12:58,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 19:12:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 19:12:58,198 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 19:12:58,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-09 19:12:58,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 19:12:58,680 INFO L258 CegarLoopResult]: At program point L35-3(lines 35 37) the Hoare annotation is: (let ((.cse2 (* 2 ULTIMATE.start_main_~i~0))) (let ((.cse1 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (.cse0 (<= .cse2 ULTIMATE.start_main_~j~0))) (or (and .cse0 .cse1 (<= ULTIMATE.start_main_~i~0 1) (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0))) (and (<= ULTIMATE.start_main_~j~0 (+ (* 2 ULTIMATE.start_main_~n~0) ULTIMATE.start_main_~i~0 1)) .cse0 .cse1 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= 1 ULTIMATE.start_main_~i~0)) (and .cse0 (= ULTIMATE.start_main_~i~0 0) (<= (+ ULTIMATE.start_main_~i~0 1) ULTIMATE.start_main_~n~0) (<= ULTIMATE.start_main_~j~0 .cse2))))) [2020-12-09 19:12:58,680 INFO L262 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-12-09 19:12:58,680 INFO L262 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-12-09 19:12:58,681 INFO L258 CegarLoopResult]: At program point L36-2(lines 36 37) the Hoare annotation is: (let ((.cse0 (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0)) (.cse1 (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0)) (.cse2 (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0)))) (or (and .cse0 .cse1 (<= ULTIMATE.start_main_~k~0 (div ULTIMATE.start_main_~j~0 2)) (<= ULTIMATE.start_main_~i~0 1) .cse2 (<= (div (* ULTIMATE.start_main_~j~0 (- 1)) (- 2)) ULTIMATE.start_main_~k~0)) (and .cse0 .cse1 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse2))) [2020-12-09 19:12:58,681 INFO L262 CegarLoopResult]: For program point L32(line 32) no Hoare annotation was computed. [2020-12-09 19:12:58,681 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 19:12:58,681 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2020-12-09 19:12:58,681 INFO L262 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-12-09 19:12:58,681 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 19:12:58,681 INFO L265 CegarLoopResult]: At program point L38(lines 25 40) the Hoare annotation is: true [2020-12-09 19:12:58,681 INFO L258 CegarLoopResult]: At program point L34-3(lines 34 37) the Hoare annotation is: (let ((.cse3 (* 2 ULTIMATE.start_main_~i~0)) (.cse0 (* 2 ULTIMATE.start_main_~n~0))) (let ((.cse1 (<= .cse3 (+ .cse0 2))) (.cse2 (<= 1 ULTIMATE.start_main_~i~0))) (or (= ULTIMATE.start_main_~i~0 0) (and (<= ULTIMATE.start_main_~j~0 (+ .cse0 ULTIMATE.start_main_~i~0 1)) (<= 2 ULTIMATE.start_main_~n~0) .cse1 (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse2) (and .cse1 (<= ULTIMATE.start_main_~i~0 1) .cse2 (<= ULTIMATE.start_main_~j~0 .cse3))))) [2020-12-09 19:12:58,681 INFO L262 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-12-09 19:12:58,681 INFO L262 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-12-09 19:12:58,681 INFO L258 CegarLoopResult]: At program point L18-2(lines 1 40) the Hoare annotation is: (and (<= (* 2 ULTIMATE.start_main_~i~0) ULTIMATE.start_main_~j~0) (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (< ULTIMATE.start_main_~j~0 (* 3 ULTIMATE.start_main_~i~0))) [2020-12-09 19:12:58,681 INFO L265 CegarLoopResult]: At program point L39(lines 25 40) the Hoare annotation is: true [2020-12-09 19:12:58,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:12:58 BoogieIcfgContainer [2020-12-09 19:12:58,694 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:12:58,694 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:12:58,694 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:12:58,695 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:12:58,695 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:12:53" (3/4) ... [2020-12-09 19:12:58,697 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 19:12:58,704 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-12-09 19:12:58,704 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-09 19:12:58,704 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 19:12:58,704 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 19:12:58,739 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_fd318a02-e9bb-436b-8b9a-abbeaff7a3b4/bin/utaipan/witness.graphml [2020-12-09 19:12:58,739 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:12:58,740 INFO L168 Benchmark]: Toolchain (without parser) took 6124.42 ms. Allocated memory was 134.2 MB in the beginning and 195.0 MB in the end (delta: 60.8 MB). Free memory was 97.6 MB in the beginning and 77.2 MB in the end (delta: 20.3 MB). Peak memory consumption was 80.9 MB. Max. memory is 16.1 GB. [2020-12-09 19:12:58,741 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 134.2 MB. Free memory is still 113.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:12:58,741 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.91 ms. Allocated memory is still 134.2 MB. Free memory was 97.5 MB in the beginning and 108.7 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 19:12:58,741 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.62 ms. Allocated memory is still 134.2 MB. Free memory was 108.7 MB in the beginning and 107.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:12:58,742 INFO L168 Benchmark]: Boogie Preprocessor took 14.57 ms. Allocated memory is still 134.2 MB. Free memory was 107.0 MB in the beginning and 105.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:12:58,742 INFO L168 Benchmark]: RCFGBuilder took 258.68 ms. Allocated memory is still 134.2 MB. Free memory was 105.8 MB in the beginning and 88.6 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-09 19:12:58,743 INFO L168 Benchmark]: TraceAbstraction took 5614.89 ms. Allocated memory was 134.2 MB in the beginning and 195.0 MB in the end (delta: 60.8 MB). Free memory was 88.1 MB in the beginning and 79.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 70.9 MB. Max. memory is 16.1 GB. [2020-12-09 19:12:58,743 INFO L168 Benchmark]: Witness Printer took 44.97 ms. Allocated memory is still 195.0 MB. Free memory was 79.3 MB in the beginning and 77.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:12:58,745 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 134.2 MB. Free memory is still 113.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 163.91 ms. Allocated memory is still 134.2 MB. Free memory was 97.5 MB in the beginning and 108.7 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.62 ms. Allocated memory is still 134.2 MB. Free memory was 108.7 MB in the beginning and 107.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 14.57 ms. Allocated memory is still 134.2 MB. Free memory was 107.0 MB in the beginning and 105.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 258.68 ms. Allocated memory is still 134.2 MB. Free memory was 105.8 MB in the beginning and 88.6 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5614.89 ms. Allocated memory was 134.2 MB in the beginning and 195.0 MB in the end (delta: 60.8 MB). Free memory was 88.1 MB in the beginning and 79.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 70.9 MB. Max. memory is 16.1 GB. * Witness Printer took 44.97 ms. Allocated memory is still 195.0 MB. Free memory was 79.3 MB in the beginning and 77.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (i == 0 || ((((j <= 2 * n + i + 1 && 2 <= n) && 2 * i <= 2 * n + 2) && 1 <= cond) && 1 <= i)) || (((2 * i <= 2 * n + 2 && i <= 1) && 1 <= i) && j <= 2 * i) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: ((2 * i <= j && i < n) && 1 <= cond) && j < 3 * i - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((2 * i <= j && i < n) && i <= 1) && j < 3 * i) || ((((j <= 2 * n + i + 1 && 2 * i <= j) && i < n) && 1 <= cond) && 1 <= i)) || (((2 * i <= j && i == 0) && i + 1 <= n) && j <= 2 * i) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((2 * i <= j && i < n) && k <= j / 2) && i <= 1) && j < 3 * i) && j * -1 / -2 <= k) || (((2 * i <= j && i < n) && 1 <= cond) && j < 3 * i) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.2s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 70 SDtfs, 130 SDslu, 146 SDs, 0 SdLazy, 257 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 226 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, 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, 6 MinimizatonAttempts, 29 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 27 NumberOfFragments, 178 HoareAnnotationTreeSize, 6 FomulaSimplifications, 1315 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 137 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 172 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 237 ConstructedInterpolants, 0 QuantifiedInterpolants, 11694 SizeOfPredicates, 21 NumberOfNonLiveVariables, 334 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 16 InterpolantComputations, 5 PerfectInterpolantSequences, 88/120 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...