./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:35:52,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:35:52,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:35:52,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:35:52,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:35:52,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:35:52,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:35:52,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:35:52,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:35:52,624 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:35:52,625 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:35:52,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:35:52,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:35:52,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:35:52,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:35:52,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:35:52,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:35:52,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:35:52,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:35:52,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:35:52,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:35:52,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:35:52,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:35:52,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:35:52,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:35:52,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:35:52,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:35:52,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:35:52,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:35:52,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:35:52,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:35:52,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:35:52,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:35:52,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:35:52,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:35:52,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:35:52,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:35:52,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:35:52,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:35:52,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:35:52,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:35:52,681 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-03 12:35:52,728 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:35:52,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:35:52,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:35:52,730 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:35:52,730 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:35:52,730 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:35:52,730 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:35:52,731 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:35:52,731 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:35:52,731 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:35:52,732 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:35:52,732 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:35:52,733 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:35:52,733 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:35:52,733 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:35:52,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 12:35:52,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 12:35:52,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:35:52,735 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:35:52,735 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:35:52,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:35:52,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:35:52,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:35:52,736 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-03 12:35:52,736 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-03 12:35:52,736 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-03 12:35:52,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:35:52,738 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:35:52,738 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:35:52,739 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:35:52,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:35:52,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:35:52,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:35:52,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:35:52,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:35:52,740 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:35:52,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:35:52,741 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:35:52,741 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:35:52,741 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_f7b9a404-fffd-4767-b60a-dc40ee035255/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 [2020-12-03 12:35:53,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:35:53,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:35:53,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:35:53,068 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:35:53,071 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:35:53,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2020-12-03 12:35:53,159 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/data/71a5f3c0f/b9ae85ca828a495a829c04b5e3067f60/FLAG7e7fc54fd [2020-12-03 12:35:53,635 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:35:53,636 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2020-12-03 12:35:53,648 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/data/71a5f3c0f/b9ae85ca828a495a829c04b5e3067f60/FLAG7e7fc54fd [2020-12-03 12:35:54,015 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/data/71a5f3c0f/b9ae85ca828a495a829c04b5e3067f60 [2020-12-03 12:35:54,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:35:54,022 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:35:54,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:35:54,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:35:54,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:35:54,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25bc4b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54, skipping insertion in model container [2020-12-03 12:35:54,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:35:54,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:35:54,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:35:54,301 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:35:54,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:35:54,345 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:35:54,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54 WrapperNode [2020-12-03 12:35:54,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:35:54,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:35:54,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:35:54,350 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:35:54,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:35:54,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:35:54,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:35:54,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:35:54,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:35:54,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:35:54,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:35:54,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:35:54,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/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 [2020-12-03 12:35:54,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-03 12:35:54,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:35:54,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:35:54,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-03 12:35:54,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:35:54,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-03 12:35:55,030 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:35:55,030 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-03 12:35:55,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:55 BoogieIcfgContainer [2020-12-03 12:35:55,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:35:55,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:35:55,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:35:55,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:35:55,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:35:54" (1/3) ... [2020-12-03 12:35:55,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edeb034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:35:55, skipping insertion in model container [2020-12-03 12:35:55,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (2/3) ... [2020-12-03 12:35:55,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edeb034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:35:55, skipping insertion in model container [2020-12-03 12:35:55,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:55" (3/3) ... [2020-12-03 12:35:55,055 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2020-12-03 12:35:55,073 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:35:55,076 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-03 12:35:55,109 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-03 12:35:55,152 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:35:55,153 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-03 12:35:55,153 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:35:55,153 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:35:55,153 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:35:55,154 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:35:55,154 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:35:55,154 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:35:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-03 12:35:55,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:35:55,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:55,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:35:55,174 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:55,180 INFO L82 PathProgramCache]: Analyzing trace with hash 3121969, now seen corresponding path program 1 times [2020-12-03 12:35:55,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:55,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340653187] [2020-12-03 12:35:55,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:55,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340653187] [2020-12-03 12:35:55,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:55,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:35:55,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530884589] [2020-12-03 12:35:55,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:55,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:55,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:55,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:55,393 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-12-03 12:35:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:55,485 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-12-03 12:35:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:55,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-03 12:35:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:55,497 INFO L225 Difference]: With dead ends: 37 [2020-12-03 12:35:55,497 INFO L226 Difference]: Without dead ends: 35 [2020-12-03 12:35:55,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:55,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-03 12:35:55,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2020-12-03 12:35:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-03 12:35:55,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-03 12:35:55,535 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-12-03 12:35:55,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:55,536 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-03 12:35:55,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:55,536 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-03 12:35:55,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:35:55,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:55,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:35:55,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:35:55,538 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:55,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:55,542 INFO L82 PathProgramCache]: Analyzing trace with hash 3050837, now seen corresponding path program 1 times [2020-12-03 12:35:55,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:55,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621061970] [2020-12-03 12:35:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:55,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621061970] [2020-12-03 12:35:55,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:55,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-03 12:35:55,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613770678] [2020-12-03 12:35:55,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:55,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:55,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:55,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:55,615 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-12-03 12:35:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:55,641 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-03 12:35:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:55,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-03 12:35:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:55,644 INFO L225 Difference]: With dead ends: 18 [2020-12-03 12:35:55,644 INFO L226 Difference]: Without dead ends: 18 [2020-12-03 12:35:55,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-03 12:35:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-03 12:35:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-03 12:35:55,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-03 12:35:55,654 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 4 [2020-12-03 12:35:55,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:55,654 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-03 12:35:55,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:55,655 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-03 12:35:55,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:35:55,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:55,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:35:55,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:35:55,656 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:55,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:55,659 INFO L82 PathProgramCache]: Analyzing trace with hash 3050838, now seen corresponding path program 1 times [2020-12-03 12:35:55,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:55,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456926812] [2020-12-03 12:35:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:55,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456926812] [2020-12-03 12:35:55,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:55,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-03 12:35:55,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290056309] [2020-12-03 12:35:55,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:55,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:55,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:55,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:55,786 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2020-12-03 12:35:55,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:55,821 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-12-03 12:35:55,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:55,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-03 12:35:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:55,823 INFO L225 Difference]: With dead ends: 25 [2020-12-03 12:35:55,823 INFO L226 Difference]: Without dead ends: 25 [2020-12-03 12:35:55,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:55,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-03 12:35:55,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-03 12:35:55,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-03 12:35:55,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2020-12-03 12:35:55,827 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 4 [2020-12-03 12:35:55,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:55,828 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2020-12-03 12:35:55,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2020-12-03 12:35:55,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:35:55,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:55,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:35:55,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:35:55,829 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:55,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:55,829 INFO L82 PathProgramCache]: Analyzing trace with hash 3048869, now seen corresponding path program 1 times [2020-12-03 12:35:55,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:55,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859504004] [2020-12-03 12:35:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:55,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859504004] [2020-12-03 12:35:55,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:55,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:35:55,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545308675] [2020-12-03 12:35:55,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:35:55,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:55,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:35:55,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:35:55,883 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 4 states. [2020-12-03 12:35:55,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:55,976 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-03 12:35:55,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:35:55,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-03 12:35:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:55,981 INFO L225 Difference]: With dead ends: 38 [2020-12-03 12:35:55,981 INFO L226 Difference]: Without dead ends: 38 [2020-12-03 12:35:55,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:55,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-03 12:35:55,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 20. [2020-12-03 12:35:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-03 12:35:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-03 12:35:55,988 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-12-03 12:35:55,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:55,988 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-03 12:35:55,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:35:55,988 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-03 12:35:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-03 12:35:55,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:55,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:55,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-03 12:35:55,989 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:55,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:55,990 INFO L82 PathProgramCache]: Analyzing trace with hash 694595734, now seen corresponding path program 1 times [2020-12-03 12:35:55,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:55,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544942064] [2020-12-03 12:35:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:56,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544942064] [2020-12-03 12:35:56,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495833118] [2020-12-03 12:35:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/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 [2020-12-03 12:35:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:56,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-03 12:35:56,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:56,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:35:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:56,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [719223903] [2020-12-03 12:35:56,225 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:35:56,225 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:35:56,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:35:56,235 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:35:56,236 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:35:56,696 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:35:56,793 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:35:57,114 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-12-03 12:35:57,399 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-12-03 12:35:57,651 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2020-12-03 12:35:57,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:35:57,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2020-12-03 12:35:57,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185995036] [2020-12-03 12:35:57,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:35:57,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:57,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:35:57,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:35:57,659 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-12-03 12:35:57,865 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-12-03 12:35:57,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:57,940 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-12-03 12:35:57,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:35:57,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-03 12:35:57,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:57,942 INFO L225 Difference]: With dead ends: 26 [2020-12-03 12:35:57,942 INFO L226 Difference]: Without dead ends: 26 [2020-12-03 12:35:57,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:35:57,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-03 12:35:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-12-03 12:35:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-03 12:35:57,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-03 12:35:57,951 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 7 [2020-12-03 12:35:57,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:57,952 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-03 12:35:57,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:35:57,955 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-03 12:35:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-03 12:35:57,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:57,956 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-12-03 12:35:58,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:35:58,172 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:35:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:58,172 INFO L82 PathProgramCache]: Analyzing trace with hash 694522633, now seen corresponding path program 1 times [2020-12-03 12:35:58,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:58,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270199614] [2020-12-03 12:35:58,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:58,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270199614] [2020-12-03 12:35:58,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410034364] [2020-12-03 12:35:58,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/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 [2020-12-03 12:35:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:58,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 12:35:58,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:58,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:35:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:58,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485079687] [2020-12-03 12:35:58,362 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-03 12:35:58,362 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:35:58,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:35:58,365 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:35:58,365 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:35:58,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:35:58,588 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:35:58,903 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-12-03 12:35:59,214 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-12-03 12:35:59,513 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 52 [2020-12-03 12:35:59,755 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2020-12-03 12:35:59,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:35:59,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2020-12-03 12:35:59,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475837873] [2020-12-03 12:35:59,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:35:59,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:59,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:35:59,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:35:59,761 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-12-03 12:35:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:59,873 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-12-03 12:35:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:35:59,873 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-03 12:35:59,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:59,874 INFO L225 Difference]: With dead ends: 24 [2020-12-03 12:35:59,874 INFO L226 Difference]: Without dead ends: 24 [2020-12-03 12:35:59,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:35:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-03 12:35:59,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-03 12:35:59,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-03 12:35:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-03 12:35:59,877 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2020-12-03 12:35:59,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:59,878 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-03 12:35:59,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:35:59,878 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-03 12:35:59,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:59,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:59,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:00,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-03 12:36:00,079 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:00,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:00,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1666401205, now seen corresponding path program 1 times [2020-12-03 12:36:00,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:00,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113363301] [2020-12-03 12:36:00,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:00,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113363301] [2020-12-03 12:36:00,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886067000] [2020-12-03 12:36:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/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 [2020-12-03 12:36:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:00,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-03 12:36:00,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:00,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:00,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [996887657] [2020-12-03 12:36:00,322 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:36:00,322 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:00,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:00,323 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:00,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:00,441 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:00,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:00,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:01,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:01,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:01,214 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:01,225 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:01,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:01,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:01,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:01,410 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) [2020-12-03 12:36:01,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:01,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 6 [2020-12-03 12:36:01,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628091575] [2020-12-03 12:36:01,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 12:36:01,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:01,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 12:36:01,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-03 12:36:01,422 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2020-12-03 12:36:01,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:01,613 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2020-12-03 12:36:01,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 12:36:01,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-03 12:36:01,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:01,619 INFO L225 Difference]: With dead ends: 59 [2020-12-03 12:36:01,619 INFO L226 Difference]: Without dead ends: 59 [2020-12-03 12:36:01,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:36:01,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-03 12:36:01,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-12-03 12:36:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-03 12:36:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2020-12-03 12:36:01,627 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 10 [2020-12-03 12:36:01,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:01,627 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2020-12-03 12:36:01,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 12:36:01,627 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2020-12-03 12:36:01,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:36:01,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:01,628 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:01,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-03 12:36:01,842 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:01,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:01,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1666399236, now seen corresponding path program 1 times [2020-12-03 12:36:01,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:01,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016467668] [2020-12-03 12:36:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:01,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016467668] [2020-12-03 12:36:01,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031975609] [2020-12-03 12:36:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/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 [2020-12-03 12:36:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:01,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 12:36:01,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:02,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:02,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1962098220] [2020-12-03 12:36:02,050 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:36:02,050 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:02,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:02,051 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:02,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:02,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:02,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:02,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:02,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:02,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:02,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:02,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:02,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:03,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:03,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:03,066 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) [2020-12-03 12:36:03,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:03,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-12-03 12:36:03,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033482172] [2020-12-03 12:36:03,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-03 12:36:03,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:03,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-03 12:36:03,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:36:03,069 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand 10 states. [2020-12-03 12:36:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:03,248 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-12-03 12:36:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-03 12:36:03,249 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2020-12-03 12:36:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:03,250 INFO L225 Difference]: With dead ends: 53 [2020-12-03 12:36:03,250 INFO L226 Difference]: Without dead ends: 53 [2020-12-03 12:36:03,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-12-03 12:36:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-03 12:36:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-12-03 12:36:03,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-03 12:36:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-12-03 12:36:03,255 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 10 [2020-12-03 12:36:03,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:03,255 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-12-03 12:36:03,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-03 12:36:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2020-12-03 12:36:03,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-03 12:36:03,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:03,257 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2020-12-03 12:36:03,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:03,485 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:03,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:03,486 INFO L82 PathProgramCache]: Analyzing trace with hash -499405208, now seen corresponding path program 2 times [2020-12-03 12:36:03,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:03,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859753667] [2020-12-03 12:36:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 12:36:03,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859753667] [2020-12-03 12:36:03,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745018002] [2020-12-03 12:36:03,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/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 [2020-12-03 12:36:03,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-03 12:36:03,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:36:03,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-03 12:36:03,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-03 12:36:03,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-03 12:36:03,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1554240810] [2020-12-03 12:36:03,722 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:36:03,722 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:03,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:03,723 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:03,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:03,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:03,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:03,964 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:04,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:04,274 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:04,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:04,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:04,343 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:04,505 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) [2020-12-03 12:36:04,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:04,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2020-12-03 12:36:04,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383658521] [2020-12-03 12:36:04,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-03 12:36:04,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:04,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-03 12:36:04,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:36:04,508 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 11 states. [2020-12-03 12:36:04,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:04,738 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-12-03 12:36:04,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 12:36:04,739 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-03 12:36:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:04,740 INFO L225 Difference]: With dead ends: 48 [2020-12-03 12:36:04,740 INFO L226 Difference]: Without dead ends: 48 [2020-12-03 12:36:04,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-12-03 12:36:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-03 12:36:04,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-12-03 12:36:04,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-03 12:36:04,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-12-03 12:36:04,745 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 13 [2020-12-03 12:36:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:04,745 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-12-03 12:36:04,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-03 12:36:04,745 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-12-03 12:36:04,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-03 12:36:04,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:04,746 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2020-12-03 12:36:04,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:04,969 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:04,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:04,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1046560043, now seen corresponding path program 1 times [2020-12-03 12:36:04,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:04,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899882482] [2020-12-03 12:36:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:05,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899882482] [2020-12-03 12:36:05,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759854389] [2020-12-03 12:36:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:05,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-03 12:36:05,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:36:05,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:36:05,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1385083367] [2020-12-03 12:36:05,137 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:36:05,137 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:05,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:05,139 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:05,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:05,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:05,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:05,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:05,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:05,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:05,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:05,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:05,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:05,894 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) [2020-12-03 12:36:05,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:05,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 2, 2] total 4 [2020-12-03 12:36:05,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873289162] [2020-12-03 12:36:05,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:36:05,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:05,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:36:05,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:36:05,897 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 5 states. [2020-12-03 12:36:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:05,927 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-12-03 12:36:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:36:05,928 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-03 12:36:05,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:05,928 INFO L225 Difference]: With dead ends: 39 [2020-12-03 12:36:05,928 INFO L226 Difference]: Without dead ends: 39 [2020-12-03 12:36:05,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:36:05,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-03 12:36:05,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-03 12:36:05,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-03 12:36:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-12-03 12:36:05,932 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 14 [2020-12-03 12:36:05,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:05,932 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-12-03 12:36:05,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:36:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-12-03 12:36:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-03 12:36:05,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:05,933 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2020-12-03 12:36:06,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-12-03 12:36:06,161 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:06,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:06,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1046560044, now seen corresponding path program 1 times [2020-12-03 12:36:06,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:06,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125407208] [2020-12-03 12:36:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:36:06,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125407208] [2020-12-03 12:36:06,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797791722] [2020-12-03 12:36:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:06,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-03 12:36:06,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:36:06,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:36:06,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [268192437] [2020-12-03 12:36:06,375 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:36:06,375 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:06,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:06,376 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:06,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:06,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:06,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:06,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:06,873 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:06,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:06,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:06,954 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:06,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:07,111 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) [2020-12-03 12:36:07,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:07,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-03 12:36:07,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524355605] [2020-12-03 12:36:07,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:36:07,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:07,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:36:07,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:36:07,114 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2020-12-03 12:36:07,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:07,188 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2020-12-03 12:36:07,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:36:07,188 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-03 12:36:07,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:07,189 INFO L225 Difference]: With dead ends: 68 [2020-12-03 12:36:07,189 INFO L226 Difference]: Without dead ends: 68 [2020-12-03 12:36:07,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-03 12:36:07,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-03 12:36:07,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-12-03 12:36:07,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-03 12:36:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-12-03 12:36:07,193 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 14 [2020-12-03 12:36:07,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:07,194 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-12-03 12:36:07,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:36:07,194 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-12-03 12:36:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-03 12:36:07,195 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:07,195 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1] [2020-12-03 12:36:07,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:07,405 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:07,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:07,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1842774988, now seen corresponding path program 2 times [2020-12-03 12:36:07,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:07,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041895405] [2020-12-03 12:36:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-03 12:36:07,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041895405] [2020-12-03 12:36:07,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68412389] [2020-12-03 12:36:07,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:07,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-03 12:36:07,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:36:07,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-03 12:36:07,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-03 12:36:07,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-03 12:36:07,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1750319044] [2020-12-03 12:36:07,837 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:36:07,838 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:07,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:07,838 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:07,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:07,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:08,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:08,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:08,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:08,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:08,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:08,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:08,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:08,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:08,760 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) [2020-12-03 12:36:08,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:08,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 12 [2020-12-03 12:36:08,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180037020] [2020-12-03 12:36:08,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-03 12:36:08,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:08,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-03 12:36:08,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-12-03 12:36:08,765 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 14 states. [2020-12-03 12:36:09,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:09,370 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-12-03 12:36:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-03 12:36:09,371 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-12-03 12:36:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:09,372 INFO L225 Difference]: With dead ends: 65 [2020-12-03 12:36:09,372 INFO L226 Difference]: Without dead ends: 65 [2020-12-03 12:36:09,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=630, Unknown=0, NotChecked=0, Total=930 [2020-12-03 12:36:09,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-03 12:36:09,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2020-12-03 12:36:09,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-03 12:36:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-12-03 12:36:09,376 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 20 [2020-12-03 12:36:09,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:09,376 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-12-03 12:36:09,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-03 12:36:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-12-03 12:36:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-03 12:36:09,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:09,378 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:09,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:09,605 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:09,605 INFO L82 PathProgramCache]: Analyzing trace with hash 688991571, now seen corresponding path program 1 times [2020-12-03 12:36:09,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:09,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617288501] [2020-12-03 12:36:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-03 12:36:09,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617288501] [2020-12-03 12:36:09,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025384783] [2020-12-03 12:36:09,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:09,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-03 12:36:09,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-03 12:36:09,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-03 12:36:09,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [729075229] [2020-12-03 12:36:09,906 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-03 12:36:09,906 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:09,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:36:09,907 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:36:09,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:36:10,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:10,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:10,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:10,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:10,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:10,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:10,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:10,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:10,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:10,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-03 12:36:10,781 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) [2020-12-03 12:36:10,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:10,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2020-12-03 12:36:10,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373309636] [2020-12-03 12:36:10,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 12:36:10,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:10,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 12:36:10,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:36:10,785 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 12 states. [2020-12-03 12:36:11,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:11,030 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-12-03 12:36:11,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-03 12:36:11,031 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-12-03 12:36:11,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:11,032 INFO L225 Difference]: With dead ends: 52 [2020-12-03 12:36:11,032 INFO L226 Difference]: Without dead ends: 52 [2020-12-03 12:36:11,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-12-03 12:36:11,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-03 12:36:11,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2020-12-03 12:36:11,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-03 12:36:11,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-12-03 12:36:11,038 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 27 [2020-12-03 12:36:11,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:11,039 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-12-03 12:36:11,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 12:36:11,039 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-12-03 12:36:11,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-03 12:36:11,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:11,041 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:11,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:11,255 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:11,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:11,255 INFO L82 PathProgramCache]: Analyzing trace with hash -359526703, now seen corresponding path program 2 times [2020-12-03 12:36:11,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:11,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005238070] [2020-12-03 12:36:11,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-03 12:36:11,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005238070] [2020-12-03 12:36:11,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584951507] [2020-12-03 12:36:11,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:11,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-03 12:36:11,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:36:11,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 12:36:11,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-03 12:36:11,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-03 12:36:11,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-03 12:36:11,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6] total 10 [2020-12-03 12:36:11,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628573026] [2020-12-03 12:36:11,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:36:11,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:11,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:36:11,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:36:11,556 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 6 states. [2020-12-03 12:36:11,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:11,573 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-12-03 12:36:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:36:11,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-12-03 12:36:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:11,576 INFO L225 Difference]: With dead ends: 43 [2020-12-03 12:36:11,576 INFO L226 Difference]: Without dead ends: 0 [2020-12-03 12:36:11,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-03 12:36:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-03 12:36:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-03 12:36:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-03 12:36:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-03 12:36:11,577 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-12-03 12:36:11,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:11,577 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-03 12:36:11,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:36:11,578 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-03 12:36:11,578 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-03 12:36:11,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-12-03 12:36:11,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:36:11 BoogieIcfgContainer [2020-12-03 12:36:11,809 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:36:11,810 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:36:11,810 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:36:11,810 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:36:11,811 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:55" (3/4) ... [2020-12-03 12:36:11,814 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-03 12:36:11,826 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2020-12-03 12:36:11,827 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-03 12:36:11,827 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-03 12:36:11,875 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f7b9a404-fffd-4767-b60a-dc40ee035255/bin/utaipan/witness.graphml [2020-12-03 12:36:11,875 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:36:11,876 INFO L168 Benchmark]: Toolchain (without parser) took 17854.09 ms. Allocated memory was 86.0 MB in the beginning and 232.8 MB in the end (delta: 146.8 MB). Free memory was 54.3 MB in the beginning and 98.2 MB in the end (delta: -43.9 MB). Peak memory consumption was 102.6 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:11,876 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 86.0 MB. Free memory was 42.7 MB in the beginning and 42.7 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:11,877 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.08 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 54.1 MB in the beginning and 86.8 MB in the end (delta: -32.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:11,877 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.31 ms. Allocated memory is still 109.1 MB. Free memory was 86.8 MB in the beginning and 85.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:11,878 INFO L168 Benchmark]: Boogie Preprocessor took 45.20 ms. Allocated memory is still 109.1 MB. Free memory was 85.3 MB in the beginning and 84.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:11,878 INFO L168 Benchmark]: RCFGBuilder took 589.95 ms. Allocated memory is still 109.1 MB. Free memory was 84.1 MB in the beginning and 62.6 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:11,878 INFO L168 Benchmark]: TraceAbstraction took 16775.30 ms. Allocated memory was 109.1 MB in the beginning and 232.8 MB in the end (delta: 123.7 MB). Free memory was 62.3 MB in the beginning and 100.3 MB in the end (delta: -38.0 MB). Peak memory consumption was 88.9 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:11,879 INFO L168 Benchmark]: Witness Printer took 65.08 ms. Allocated memory is still 232.8 MB. Free memory was 100.3 MB in the beginning and 98.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:11,881 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 86.0 MB. Free memory was 42.7 MB in the beginning and 42.7 MB in the end (delta: 75.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 323.08 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 54.1 MB in the beginning and 86.8 MB in the end (delta: -32.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.31 ms. Allocated memory is still 109.1 MB. Free memory was 86.8 MB in the beginning and 85.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.20 ms. Allocated memory is still 109.1 MB. Free memory was 85.3 MB in the beginning and 84.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 589.95 ms. Allocated memory is still 109.1 MB. Free memory was 84.1 MB in the beginning and 62.6 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16775.30 ms. Allocated memory was 109.1 MB in the beginning and 232.8 MB in the end (delta: 123.7 MB). Free memory was 62.3 MB in the beginning and 100.3 MB in the end (delta: -38.0 MB). Peak memory consumption was 88.9 MB. Max. memory is 16.1 GB. * Witness Printer took 65.08 ms. Allocated memory is still 232.8 MB. Free memory was 100.3 MB in the beginning and 98.2 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: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 15]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16.6s, OverallIterations: 14, TraceHistogramMax: 5, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 126 SDtfs, 455 SDslu, 134 SDs, 0 SdLazy, 725 SolverSat, 192 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 400 GetRequests, 272 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=7, 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, 14 MinimizatonAttempts, 112 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 326 NumberOfCodeBlocks, 281 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 447 ConstructedInterpolants, 1 QuantifiedInterpolants, 62965 SizeOfPredicates, 35 NumberOfNonLiveVariables, 883 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 34 InterpolantComputations, 6 PerfectInterpolantSequences, 372/582 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: OVERALL_TIME[ms]: 795, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 21, TOOLS_POST_TIME[ms]: 550, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 21, TOOLS_QUANTIFIERELIM_TIME[ms]: 532, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 123, FLUID_QUERY_TIME[ms]: 4, FLUID_QUERIES: 43, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 158, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME[ms]: 15, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME[ms]: 16, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 527, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 526, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 11, DAG_COMPRESSION_PROCESSED_NODES: 72, DAG_COMPRESSION_RETAINED_NODES: 42, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...