./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_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI --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 [2021-10-11 02:32:56,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:32:56,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:32:56,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:32:56,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:32:56,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:32:56,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:32:56,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:32:56,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:32:56,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:32:56,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:32:56,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:32:56,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:32:56,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:32:56,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:32:56,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:32:56,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:32:56,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:32:56,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:32:56,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:32:56,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:32:56,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:32:56,754 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:32:56,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:32:56,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:32:56,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:32:56,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:32:56,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:32:56,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:32:56,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:32:56,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:32:56,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:32:56,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:32:56,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:32:56,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:32:56,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:32:56,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:32:56,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:32:56,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:32:56,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:32:56,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:32:56,771 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:32:56,795 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:32:56,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:32:56,796 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:32:56,797 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:32:56,797 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:32:56,797 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:32:56,798 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:32:56,798 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:32:56,798 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:32:56,798 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:32:56,799 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:32:56,799 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:32:56,799 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:32:56,800 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:32:56,800 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:32:56,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:32:56,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:32:56,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:32:56,802 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:32:56,802 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:32:56,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:32:56,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:32:56,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:32:56,803 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:32:56,803 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:32:56,804 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:32:56,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:32:56,804 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:32:56,804 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:32:56,805 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:32:56,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:32:56,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:32:56,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:32:56,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:32:56,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:32:56,807 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:32:56,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:32:56,807 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:32:56,808 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:32:56,808 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_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 [2021-10-11 02:32:57,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:32:57,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:32:57,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:32:57,072 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:32:57,073 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:32:57,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2021-10-11 02:32:57,139 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/data/549201169/886b5907894742c985dc7866bd5bb3ff/FLAG645602a24 [2021-10-11 02:32:57,574 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:32:57,574 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2021-10-11 02:32:57,580 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/data/549201169/886b5907894742c985dc7866bd5bb3ff/FLAG645602a24 [2021-10-11 02:32:57,961 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/data/549201169/886b5907894742c985dc7866bd5bb3ff [2021-10-11 02:32:57,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:32:57,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:32:57,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:57,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:32:57,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:32:57,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:57" (1/1) ... [2021-10-11 02:32:57,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@657883f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:57, skipping insertion in model container [2021-10-11 02:32:57,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:57" (1/1) ... [2021-10-11 02:32:57,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:32:57,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:32:58,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:58,179 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:32:58,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:58,216 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:32:58,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:58 WrapperNode [2021-10-11 02:32:58,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:58,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:58,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:32:58,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:32:58,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:58" (1/1) ... [2021-10-11 02:32:58,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:58" (1/1) ... [2021-10-11 02:32:58,262 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:58,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:32:58,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:32:58,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:32:58,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:58" (1/1) ... [2021-10-11 02:32:58,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:58" (1/1) ... [2021-10-11 02:32:58,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:58" (1/1) ... [2021-10-11 02:32:58,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:58" (1/1) ... [2021-10-11 02:32:58,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:58" (1/1) ... [2021-10-11 02:32:58,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:58" (1/1) ... [2021-10-11 02:32:58,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:58" (1/1) ... [2021-10-11 02:32:58,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:32:58,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:32:58,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:32:58,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:32:58,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:58" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:32:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:32:58,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:32:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:32:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:32:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:32:58,930 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:32:58,931 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-10-11 02:32:58,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:58 BoogieIcfgContainer [2021-10-11 02:32:58,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:32:58,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:32:58,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:32:58,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:32:58,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:32:57" (1/3) ... [2021-10-11 02:32:58,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b904288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:58, skipping insertion in model container [2021-10-11 02:32:58,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:58" (2/3) ... [2021-10-11 02:32:58,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b904288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:58, skipping insertion in model container [2021-10-11 02:32:58,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:58" (3/3) ... [2021-10-11 02:32:58,952 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2021-10-11 02:32:58,972 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:32:58,976 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2021-10-11 02:32:58,987 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-11 02:32:59,007 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:32:59,008 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:32:59,008 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:32:59,008 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:32:59,008 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:32:59,008 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:32:59,008 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:32:59,009 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:32:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-10-11 02:32:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:32:59,028 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:59,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:32:59,029 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]=== [2021-10-11 02:32:59,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:59,035 INFO L82 PathProgramCache]: Analyzing trace with hash 3121969, now seen corresponding path program 1 times [2021-10-11 02:32:59,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:59,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126276362] [2021-10-11 02:32:59,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:59,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126276362] [2021-10-11 02:32:59,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:59,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:32:59,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785219305] [2021-10-11 02:32:59,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:59,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:59,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:59,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:59,209 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2021-10-11 02:32:59,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:59,277 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-10-11 02:32:59,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:59,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-10-11 02:32:59,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:59,295 INFO L225 Difference]: With dead ends: 37 [2021-10-11 02:32:59,295 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 02:32:59,297 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 [2021-10-11 02:32:59,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 02:32:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2021-10-11 02:32:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:32:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-10-11 02:32:59,330 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2021-10-11 02:32:59,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:59,330 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-10-11 02:32:59,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:59,331 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-10-11 02:32:59,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:32:59,331 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:59,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:32:59,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:32:59,332 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]=== [2021-10-11 02:32:59,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:59,337 INFO L82 PathProgramCache]: Analyzing trace with hash 3050837, now seen corresponding path program 1 times [2021-10-11 02:32:59,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:59,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120014413] [2021-10-11 02:32:59,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:59,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120014413] [2021-10-11 02:32:59,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:59,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:32:59,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134195713] [2021-10-11 02:32:59,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:59,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:59,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:59,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:59,385 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2021-10-11 02:32:59,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:59,413 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-10-11 02:32:59,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:59,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-10-11 02:32:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:59,414 INFO L225 Difference]: With dead ends: 18 [2021-10-11 02:32:59,415 INFO L226 Difference]: Without dead ends: 18 [2021-10-11 02:32:59,415 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 [2021-10-11 02:32:59,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-11 02:32:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-11 02:32:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-11 02:32:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-10-11 02:32:59,419 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 4 [2021-10-11 02:32:59,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:59,420 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-10-11 02:32:59,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-10-11 02:32:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:32:59,421 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:59,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:32:59,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:32:59,422 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]=== [2021-10-11 02:32:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:59,422 INFO L82 PathProgramCache]: Analyzing trace with hash 3050838, now seen corresponding path program 1 times [2021-10-11 02:32:59,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:59,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390848964] [2021-10-11 02:32:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:59,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390848964] [2021-10-11 02:32:59,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:59,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:32:59,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764108328] [2021-10-11 02:32:59,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:59,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:59,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:59,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:59,482 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2021-10-11 02:32:59,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:59,519 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-10-11 02:32:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:59,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-10-11 02:32:59,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:59,521 INFO L225 Difference]: With dead ends: 25 [2021-10-11 02:32:59,521 INFO L226 Difference]: Without dead ends: 25 [2021-10-11 02:32:59,522 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 [2021-10-11 02:32:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-11 02:32:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-10-11 02:32:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:32:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2021-10-11 02:32:59,526 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 4 [2021-10-11 02:32:59,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:59,527 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2021-10-11 02:32:59,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:59,527 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2021-10-11 02:32:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:32:59,528 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:59,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:32:59,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:32:59,528 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]=== [2021-10-11 02:32:59,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:59,529 INFO L82 PathProgramCache]: Analyzing trace with hash 3048869, now seen corresponding path program 1 times [2021-10-11 02:32:59,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:59,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021573673] [2021-10-11 02:32:59,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:59,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021573673] [2021-10-11 02:32:59,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:59,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:32:59,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323089197] [2021-10-11 02:32:59,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:32:59,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:59,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:32:59,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:32:59,577 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 4 states. [2021-10-11 02:32:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:59,652 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-10-11 02:32:59,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:32:59,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2021-10-11 02:32:59,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:59,663 INFO L225 Difference]: With dead ends: 38 [2021-10-11 02:32:59,664 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 02:32:59,665 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 [2021-10-11 02:32:59,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 02:32:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 20. [2021-10-11 02:32:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 02:32:59,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-10-11 02:32:59,673 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2021-10-11 02:32:59,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:59,674 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-10-11 02:32:59,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:32:59,674 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-10-11 02:32:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:32:59,675 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:59,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:59,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:32:59,676 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]=== [2021-10-11 02:32:59,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:59,678 INFO L82 PathProgramCache]: Analyzing trace with hash 694595734, now seen corresponding path program 1 times [2021-10-11 02:32:59,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:59,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646782372] [2021-10-11 02:32:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:59,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646782372] [2021-10-11 02:32:59,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628237144] [2021-10-11 02:32:59,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:59,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:32:59,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:59,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:59,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [950417358] [2021-10-11 02:33:00,000 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:33:00,001 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:00,007 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:00,013 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:00,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:00,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:00,549 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:00,866 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-10-11 02:33:01,181 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-10-11 02:33:01,408 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2021-10-11 02:33:01,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:01,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2021-10-11 02:33:01,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339277135] [2021-10-11 02:33:01,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:33:01,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:01,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:33:01,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:33:01,418 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2021-10-11 02:33:01,657 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-10-11 02:33:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:01,748 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-10-11 02:33:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:33:01,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-10-11 02:33:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:01,751 INFO L225 Difference]: With dead ends: 26 [2021-10-11 02:33:01,751 INFO L226 Difference]: Without dead ends: 26 [2021-10-11 02:33:01,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:33:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-11 02:33:01,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-10-11 02:33:01,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 02:33:01,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-10-11 02:33:01,763 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 7 [2021-10-11 02:33:01,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:01,763 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-10-11 02:33:01,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:33:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-10-11 02:33:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:33:01,768 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:01,768 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-11 02:33:01,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:01,989 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]=== [2021-10-11 02:33:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:01,990 INFO L82 PathProgramCache]: Analyzing trace with hash 694522633, now seen corresponding path program 1 times [2021-10-11 02:33:01,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:01,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649117951] [2021-10-11 02:33:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:02,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649117951] [2021-10-11 02:33:02,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773865076] [2021-10-11 02:33:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:02,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:33:02,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:02,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:02,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [398075404] [2021-10-11 02:33:02,161 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-11 02:33:02,162 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:02,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:02,162 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:02,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:02,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:02,378 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:33:02,676 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-10-11 02:33:02,965 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-10-11 02:33:03,245 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 52 [2021-10-11 02:33:03,540 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-10-11 02:33:03,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:03,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2021-10-11 02:33:03,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961420069] [2021-10-11 02:33:03,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:33:03,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:03,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:33:03,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:33:03,545 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2021-10-11 02:33:03,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:03,653 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-10-11 02:33:03,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:33:03,654 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2021-10-11 02:33:03,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:03,655 INFO L225 Difference]: With dead ends: 24 [2021-10-11 02:33:03,655 INFO L226 Difference]: Without dead ends: 24 [2021-10-11 02:33:03,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:33:03,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-11 02:33:03,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-11 02:33:03,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 02:33:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-11 02:33:03,662 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2021-10-11 02:33:03,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:03,663 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-11 02:33:03,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:33:03,663 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-11 02:33:03,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:33:03,664 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:03,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:03,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-11 02:33:03,885 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]=== [2021-10-11 02:33:03,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:03,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1666401205, now seen corresponding path program 1 times [2021-10-11 02:33:03,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:03,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982284925] [2021-10-11 02:33:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:33:03,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982284925] [2021-10-11 02:33:03,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093876947] [2021-10-11 02:33:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:04,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:33:04,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:33:04,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:33:04,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029893784] [2021-10-11 02:33:04,165 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:33:04,165 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:04,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:04,166 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:04,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:04,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:04,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:04,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:05,068 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:05,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:05,179 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:05,192 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:05,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:05,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:05,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:05,384 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) [2021-10-11 02:33:05,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:05,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 6 [2021-10-11 02:33:05,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783314907] [2021-10-11 02:33:05,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:33:05,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:05,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:33:05,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:33:05,389 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2021-10-11 02:33:05,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:05,533 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2021-10-11 02:33:05,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:33:05,534 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-10-11 02:33:05,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:05,539 INFO L225 Difference]: With dead ends: 59 [2021-10-11 02:33:05,539 INFO L226 Difference]: Without dead ends: 59 [2021-10-11 02:33:05,539 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 [2021-10-11 02:33:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-11 02:33:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-10-11 02:33:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-10-11 02:33:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2021-10-11 02:33:05,550 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 10 [2021-10-11 02:33:05,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:05,550 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2021-10-11 02:33:05,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:33:05,552 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2021-10-11 02:33:05,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:33:05,556 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:05,556 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:05,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-11 02:33:05,767 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]=== [2021-10-11 02:33:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:05,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1666399236, now seen corresponding path program 1 times [2021-10-11 02:33:05,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:05,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612875696] [2021-10-11 02:33:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:05,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612875696] [2021-10-11 02:33:05,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361244995] [2021-10-11 02:33:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:05,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:33:05,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:05,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:33:05,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [102915851] [2021-10-11 02:33:06,002 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:33:06,002 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:06,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:06,003 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:06,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:06,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:06,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:06,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:06,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:06,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:06,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:06,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:06,755 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:06,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:06,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:06,929 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) [2021-10-11 02:33:06,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:06,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-10-11 02:33:06,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674141624] [2021-10-11 02:33:06,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:33:06,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:06,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:33:06,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:33:06,932 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand 10 states. [2021-10-11 02:33:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:07,110 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-10-11 02:33:07,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:33:07,110 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2021-10-11 02:33:07,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:07,111 INFO L225 Difference]: With dead ends: 53 [2021-10-11 02:33:07,111 INFO L226 Difference]: Without dead ends: 53 [2021-10-11 02:33:07,112 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 [2021-10-11 02:33:07,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-11 02:33:07,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2021-10-11 02:33:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-10-11 02:33:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2021-10-11 02:33:07,116 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 10 [2021-10-11 02:33:07,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:07,117 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2021-10-11 02:33:07,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:33:07,117 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2021-10-11 02:33:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:33:07,117 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:07,118 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2021-10-11 02:33:07,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:07,345 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]=== [2021-10-11 02:33:07,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:07,345 INFO L82 PathProgramCache]: Analyzing trace with hash -499405208, now seen corresponding path program 2 times [2021-10-11 02:33:07,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:07,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598788995] [2021-10-11 02:33:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:33:07,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598788995] [2021-10-11 02:33:07,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169042119] [2021-10-11 02:33:07,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:07,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:33:07,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:33:07,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:33:07,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-11 02:33:07,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-11 02:33:07,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1169748829] [2021-10-11 02:33:07,586 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:33:07,586 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:07,587 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:07,587 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:07,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:07,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:07,758 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:07,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:08,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:08,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:08,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:08,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:08,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:08,409 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) [2021-10-11 02:33:08,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:08,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2021-10-11 02:33:08,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327236633] [2021-10-11 02:33:08,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 02:33:08,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:08,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 02:33:08,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:33:08,412 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 11 states. [2021-10-11 02:33:08,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:08,620 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-10-11 02:33:08,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:33:08,620 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2021-10-11 02:33:08,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:08,621 INFO L225 Difference]: With dead ends: 48 [2021-10-11 02:33:08,621 INFO L226 Difference]: Without dead ends: 48 [2021-10-11 02:33:08,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:33:08,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-11 02:33:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-10-11 02:33:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-11 02:33:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-10-11 02:33:08,625 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 13 [2021-10-11 02:33:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:08,626 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-10-11 02:33:08,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 02:33:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-10-11 02:33:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 02:33:08,626 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:08,627 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2021-10-11 02:33:08,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:08,853 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]=== [2021-10-11 02:33:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:08,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1046560043, now seen corresponding path program 1 times [2021-10-11 02:33:08,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:08,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573084340] [2021-10-11 02:33:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:33:08,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573084340] [2021-10-11 02:33:08,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241998545] [2021-10-11 02:33:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:08,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:33:08,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:33:09,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:33:09,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536736742] [2021-10-11 02:33:09,034 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:33:09,034 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:09,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:09,036 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:09,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:09,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:09,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:09,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:09,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:09,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:09,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:09,655 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:09,666 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:09,821 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) [2021-10-11 02:33:09,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:09,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 2, 2] total 4 [2021-10-11 02:33:09,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497424488] [2021-10-11 02:33:09,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:33:09,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:09,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:33:09,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:33:09,823 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 5 states. [2021-10-11 02:33:09,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:09,858 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-10-11 02:33:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:09,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-10-11 02:33:09,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:09,859 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:33:09,859 INFO L226 Difference]: Without dead ends: 39 [2021-10-11 02:33:09,859 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 [2021-10-11 02:33:09,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-11 02:33:09,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-11 02:33:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-10-11 02:33:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-10-11 02:33:09,862 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 14 [2021-10-11 02:33:09,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:09,862 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-10-11 02:33:09,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:33:09,863 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-10-11 02:33:09,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 02:33:09,863 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:09,863 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2021-10-11 02:33:10,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-10-11 02:33:10,089 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]=== [2021-10-11 02:33:10,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:10,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1046560044, now seen corresponding path program 1 times [2021-10-11 02:33:10,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:10,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928005841] [2021-10-11 02:33:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:33:10,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928005841] [2021-10-11 02:33:10,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805161918] [2021-10-11 02:33:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:10,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-11 02:33:10,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:33:10,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:33:10,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1769950941] [2021-10-11 02:33:10,292 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:33:10,292 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:10,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:10,293 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:10,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:10,385 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:10,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:10,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:10,801 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:10,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:10,882 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:10,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:10,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:11,046 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) [2021-10-11 02:33:11,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:11,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-10-11 02:33:11,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026378131] [2021-10-11 02:33:11,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:33:11,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:11,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:33:11,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:33:11,049 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2021-10-11 02:33:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:11,121 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2021-10-11 02:33:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:33:11,122 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-10-11 02:33:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:11,122 INFO L225 Difference]: With dead ends: 68 [2021-10-11 02:33:11,122 INFO L226 Difference]: Without dead ends: 68 [2021-10-11 02:33:11,123 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 [2021-10-11 02:33:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-11 02:33:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2021-10-11 02:33:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-10-11 02:33:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-10-11 02:33:11,126 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 14 [2021-10-11 02:33:11,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:11,126 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-10-11 02:33:11,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:33:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-10-11 02:33:11,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-11 02:33:11,127 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:11,127 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1] [2021-10-11 02:33:11,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:11,341 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]=== [2021-10-11 02:33:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:11,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1842774988, now seen corresponding path program 2 times [2021-10-11 02:33:11,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:11,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184189043] [2021-10-11 02:33:11,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-11 02:33:11,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184189043] [2021-10-11 02:33:11,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174992706] [2021-10-11 02:33:11,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:11,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-11 02:33:11,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:33:11,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 02:33:11,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-11 02:33:11,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:11,771 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-11 02:33:11,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1657348930] [2021-10-11 02:33:11,774 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:33:11,774 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:11,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:11,775 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:11,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:11,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:11,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:12,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:12,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:12,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:12,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:12,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:12,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:12,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:12,577 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) [2021-10-11 02:33:12,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:12,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 12 [2021-10-11 02:33:12,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717409103] [2021-10-11 02:33:12,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-10-11 02:33:12,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:12,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-11 02:33:12,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:33:12,581 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 14 states. [2021-10-11 02:33:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:13,184 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2021-10-11 02:33:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-11 02:33:13,185 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2021-10-11 02:33:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:13,186 INFO L225 Difference]: With dead ends: 65 [2021-10-11 02:33:13,186 INFO L226 Difference]: Without dead ends: 65 [2021-10-11 02:33:13,186 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 [2021-10-11 02:33:13,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-11 02:33:13,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2021-10-11 02:33:13,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-11 02:33:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-10-11 02:33:13,189 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 20 [2021-10-11 02:33:13,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:13,190 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-10-11 02:33:13,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-10-11 02:33:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-10-11 02:33:13,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-11 02:33:13,191 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:13,191 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:13,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:13,405 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]=== [2021-10-11 02:33:13,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:13,405 INFO L82 PathProgramCache]: Analyzing trace with hash 688991571, now seen corresponding path program 1 times [2021-10-11 02:33:13,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:13,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247496809] [2021-10-11 02:33:13,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:33:13,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247496809] [2021-10-11 02:33:13,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178302896] [2021-10-11 02:33:13,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:13,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:33:13,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 02:33:13,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 02:33:13,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [558585975] [2021-10-11 02:33:13,784 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-11 02:33:13,784 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:33:13,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:33:13,785 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:33:13,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:33:13,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:13,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:14,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:14,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:14,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:14,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:14,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:14,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:14,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:14,551 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:33:14,580 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) [2021-10-11 02:33:14,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:33:14,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2021-10-11 02:33:14,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497616115] [2021-10-11 02:33:14,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 02:33:14,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:14,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 02:33:14,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:33:14,582 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 12 states. [2021-10-11 02:33:14,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:14,882 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-10-11 02:33:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 02:33:14,885 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2021-10-11 02:33:14,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:14,886 INFO L225 Difference]: With dead ends: 52 [2021-10-11 02:33:14,886 INFO L226 Difference]: Without dead ends: 52 [2021-10-11 02:33:14,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:33:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-11 02:33:14,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2021-10-11 02:33:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-11 02:33:14,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-10-11 02:33:14,894 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 27 [2021-10-11 02:33:14,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:14,894 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-10-11 02:33:14,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 02:33:14,894 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-10-11 02:33:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-11 02:33:14,897 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:33:14,897 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-11 02:33:15,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:33:15,113 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]=== [2021-10-11 02:33:15,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:33:15,113 INFO L82 PathProgramCache]: Analyzing trace with hash -359526703, now seen corresponding path program 2 times [2021-10-11 02:33:15,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:33:15,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797899235] [2021-10-11 02:33:15,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:33:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-11 02:33:15,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797899235] [2021-10-11 02:33:15,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066124856] [2021-10-11 02:33:15,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:15,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-11 02:33:15,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:33:15,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:33:15,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-11 02:33:15,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:33:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-11 02:33:15,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:33:15,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6] total 10 [2021-10-11 02:33:15,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594958096] [2021-10-11 02:33:15,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:33:15,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:33:15,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:33:15,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:33:15,493 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 6 states. [2021-10-11 02:33:15,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:33:15,515 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-10-11 02:33:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:33:15,516 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2021-10-11 02:33:15,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:33:15,517 INFO L225 Difference]: With dead ends: 43 [2021-10-11 02:33:15,517 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:33:15,517 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 [2021-10-11 02:33:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:33:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:33:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:33:15,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:33:15,518 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2021-10-11 02:33:15,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:33:15,519 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:33:15,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:33:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:33:15,519 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:33:15,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-10-11 02:33:15,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:33:15 BoogieIcfgContainer [2021-10-11 02:33:15,750 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:33:15,750 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:33:15,750 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:33:15,750 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:33:15,751 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:58" (3/4) ... [2021-10-11 02:33:15,754 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:33:15,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-10-11 02:33:15,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-11 02:33:15,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:33:15,822 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3800808e-e0b0-4cc7-b075-254365ec4497/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:33:15,822 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:33:15,824 INFO L168 Benchmark]: Toolchain (without parser) took 17858.74 ms. Allocated memory was 123.7 MB in the beginning and 218.1 MB in the end (delta: 94.4 MB). Free memory was 96.0 MB in the beginning and 69.9 MB in the end (delta: 26.0 MB). Peak memory consumption was 120.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:15,824 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 123.7 MB. Free memory is still 79.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:15,825 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.72 ms. Allocated memory is still 123.7 MB. Free memory was 96.0 MB in the beginning and 98.7 MB in the end (delta: -2.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:15,826 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.33 ms. Allocated memory is still 123.7 MB. Free memory was 98.7 MB in the beginning and 97.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:15,827 INFO L168 Benchmark]: Boogie Preprocessor took 49.33 ms. Allocated memory is still 123.7 MB. Free memory was 97.2 MB in the beginning and 96.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:15,827 INFO L168 Benchmark]: RCFGBuilder took 627.73 ms. Allocated memory is still 123.7 MB. Free memory was 95.9 MB in the beginning and 74.4 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:15,828 INFO L168 Benchmark]: TraceAbstraction took 16807.56 ms. Allocated memory was 123.7 MB in the beginning and 218.1 MB in the end (delta: 94.4 MB). Free memory was 73.9 MB in the beginning and 73.1 MB in the end (delta: 866.0 kB). Peak memory consumption was 97.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:15,828 INFO L168 Benchmark]: Witness Printer took 72.28 ms. Allocated memory is still 218.1 MB. Free memory was 73.1 MB in the beginning and 69.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:15,830 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 123.7 MB. Free memory is still 79.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 252.72 ms. Allocated memory is still 123.7 MB. Free memory was 96.0 MB in the beginning and 98.7 MB in the end (delta: -2.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.33 ms. Allocated memory is still 123.7 MB. Free memory was 98.7 MB in the beginning and 97.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.33 ms. Allocated memory is still 123.7 MB. Free memory was 97.2 MB in the beginning and 96.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 627.73 ms. Allocated memory is still 123.7 MB. Free memory was 95.9 MB in the beginning and 74.4 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16807.56 ms. Allocated memory was 123.7 MB in the beginning and 218.1 MB in the end (delta: 94.4 MB). Free memory was 73.9 MB in the beginning and 73.1 MB in the end (delta: 866.0 kB). Peak memory consumption was 97.3 MB. Max. memory is 16.1 GB. * Witness Printer took 72.28 ms. Allocated memory is still 218.1 MB. Free memory was 73.1 MB in the beginning and 69.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 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: 16.7s, 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, 3.8s 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, 0.4s 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]: 768, 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]: 535, 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]: 524, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 115, FLUID_QUERY_TIME[ms]: 6, 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]: 150, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME[ms]: 8, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME[ms]: 14, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 514, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 514, 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]: 12, 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...