./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c -s /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 07b05923cf5c1b39a35ab81b524575a0a488c268 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:22:46,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:22:46,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:22:46,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:22:46,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:22:46,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:22:46,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:22:46,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:22:46,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:22:46,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:22:46,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:22:46,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:22:46,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:22:46,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:22:46,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:22:46,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:22:46,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:22:46,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:22:46,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:22:46,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:22:46,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:22:46,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:22:46,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:22:46,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:22:46,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:22:46,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:22:46,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:22:46,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:22:46,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:22:46,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:22:46,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:22:46,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:22:46,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:22:46,808 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:22:46,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:22:46,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:22:46,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:22:46,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:22:46,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:22:46,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:22:46,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:22:46,818 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 02:22:46,865 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:22:46,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:22:46,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:22:46,868 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:22:46,868 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:22:46,868 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:22:46,869 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:22:46,869 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:22:46,869 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:22:46,869 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:22:46,871 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:22:46,871 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:22:46,871 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:22:46,872 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:22:46,872 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:22:46,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 02:22:46,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 02:22:46,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:22:46,873 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:22:46,874 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 02:22:46,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:22:46,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:22:46,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:22:46,875 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 02:22:46,875 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 02:22:46,875 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 02:22:46,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:22:46,878 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:22:46,878 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:22:46,878 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:22:46,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:22:46,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:22:46,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:22:46,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:22:46,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:22:46,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:22:46,880 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:22:46,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:22:46,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:22:46,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:22:46,881 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07b05923cf5c1b39a35ab81b524575a0a488c268 [2020-11-30 02:22:47,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:22:47,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:22:47,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:22:47,169 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:22:47,170 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:22:47,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2020-11-30 02:22:47,232 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/data/e6dac8e07/cd57ea41ee8d4a28b879f12e7cc5ac22/FLAGccfb3d268 [2020-11-30 02:22:47,716 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:22:47,717 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2020-11-30 02:22:47,724 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/data/e6dac8e07/cd57ea41ee8d4a28b879f12e7cc5ac22/FLAGccfb3d268 [2020-11-30 02:22:48,068 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/data/e6dac8e07/cd57ea41ee8d4a28b879f12e7cc5ac22 [2020-11-30 02:22:48,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:22:48,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:22:48,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:22:48,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:22:48,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:22:48,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:22:48" (1/1) ... [2020-11-30 02:22:48,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c865e8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:22:48, skipping insertion in model container [2020-11-30 02:22:48,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:22:48" (1/1) ... [2020-11-30 02:22:48,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:22:48,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:22:48,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:22:48,361 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:22:48,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:22:48,400 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:22:48,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:22:48 WrapperNode [2020-11-30 02:22:48,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:22:48,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:22:48,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:22:48,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:22:48,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:22:48" (1/1) ... [2020-11-30 02:22:48,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:22:48" (1/1) ... [2020-11-30 02:22:48,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:22:48,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:22:48,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:22:48,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:22:48,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:22:48" (1/1) ... [2020-11-30 02:22:48,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:22:48" (1/1) ... [2020-11-30 02:22:48,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:22:48" (1/1) ... [2020-11-30 02:22:48,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:22:48" (1/1) ... [2020-11-30 02:22:48,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:22:48" (1/1) ... [2020-11-30 02:22:48,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:22:48" (1/1) ... [2020-11-30 02:22:48,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:22:48" (1/1) ... [2020-11-30 02:22:48,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:22:48,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:22:48,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:22:48,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:22:48,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:22:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:22:48,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 02:22:48,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:22:48,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:22:48,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 02:22:48,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:22:48,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 02:22:49,104 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:22:49,104 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 02:22:49,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:22:49 BoogieIcfgContainer [2020-11-30 02:22:49,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:22:49,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:22:49,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:22:49,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:22:49,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:22:48" (1/3) ... [2020-11-30 02:22:49,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7006d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:22:49, skipping insertion in model container [2020-11-30 02:22:49,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:22:48" (2/3) ... [2020-11-30 02:22:49,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7006d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:22:49, skipping insertion in model container [2020-11-30 02:22:49,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:22:49" (3/3) ... [2020-11-30 02:22:49,120 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2020-11-30 02:22:49,131 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:22:49,134 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-30 02:22:49,144 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-30 02:22:49,165 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:22:49,166 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 02:22:49,166 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:22:49,166 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:22:49,166 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:22:49,166 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:22:49,166 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:22:49,166 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:22:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-11-30 02:22:49,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:22:49,186 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:22:49,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:22:49,187 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:22:49,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:22:49,193 INFO L82 PathProgramCache]: Analyzing trace with hash 3150815, now seen corresponding path program 1 times [2020-11-30 02:22:49,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:22:49,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466425719] [2020-11-30 02:22:49,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:22:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:22:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:22:49,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466425719] [2020-11-30 02:22:49,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:22:49,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:22:49,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7572497] [2020-11-30 02:22:49,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:22:49,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:22:49,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:22:49,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:22:49,378 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-11-30 02:22:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:22:49,427 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-11-30 02:22:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:22:49,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:22:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:22:49,438 INFO L225 Difference]: With dead ends: 37 [2020-11-30 02:22:49,438 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 02:22:49,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:22:49,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 02:22:49,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2020-11-30 02:22:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 02:22:49,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-30 02:22:49,480 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-11-30 02:22:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:22:49,480 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-30 02:22:49,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:22:49,481 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-30 02:22:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:22:49,482 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:22:49,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:22:49,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:22:49,483 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:22:49,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:22:49,486 INFO L82 PathProgramCache]: Analyzing trace with hash 3078660, now seen corresponding path program 1 times [2020-11-30 02:22:49,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:22:49,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297069703] [2020-11-30 02:22:49,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:22:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:22:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:22:49,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297069703] [2020-11-30 02:22:49,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:22:49,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:22:49,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882640344] [2020-11-30 02:22:49,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:22:49,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:22:49,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:22:49,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:22:49,556 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-11-30 02:22:49,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:22:49,592 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-11-30 02:22:49,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:22:49,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:22:49,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:22:49,595 INFO L225 Difference]: With dead ends: 37 [2020-11-30 02:22:49,595 INFO L226 Difference]: Without dead ends: 37 [2020-11-30 02:22:49,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:22:49,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-30 02:22:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2020-11-30 02:22:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 02:22:49,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-30 02:22:49,606 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2020-11-30 02:22:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:22:49,606 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-30 02:22:49,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:22:49,607 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-30 02:22:49,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:22:49,608 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:22:49,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:22:49,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 02:22:49,609 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:22:49,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:22:49,612 INFO L82 PathProgramCache]: Analyzing trace with hash 3080752, now seen corresponding path program 1 times [2020-11-30 02:22:49,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:22:49,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7801201] [2020-11-30 02:22:49,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:22:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:22:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:22:49,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7801201] [2020-11-30 02:22:49,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:22:49,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:22:49,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628880744] [2020-11-30 02:22:49,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:22:49,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:22:49,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:22:49,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:22:49,694 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2020-11-30 02:22:49,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:22:49,717 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-11-30 02:22:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:22:49,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:22:49,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:22:49,719 INFO L225 Difference]: With dead ends: 25 [2020-11-30 02:22:49,719 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 02:22:49,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:22:49,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 02:22:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-11-30 02:22:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 02:22:49,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-30 02:22:49,724 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 4 [2020-11-30 02:22:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:22:49,724 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-30 02:22:49,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:22:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-30 02:22:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:22:49,725 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:22:49,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:22:49,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 02:22:49,726 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:22:49,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:22:49,727 INFO L82 PathProgramCache]: Analyzing trace with hash 95438513, now seen corresponding path program 1 times [2020-11-30 02:22:49,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:22:49,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664643625] [2020-11-30 02:22:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:22:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:22:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:22:49,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664643625] [2020-11-30 02:22:49,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:22:49,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:22:49,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304896305] [2020-11-30 02:22:49,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:22:49,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:22:49,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:22:49,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:22:49,793 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-11-30 02:22:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:22:49,861 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-11-30 02:22:49,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:22:49,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-30 02:22:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:22:49,862 INFO L225 Difference]: With dead ends: 21 [2020-11-30 02:22:49,862 INFO L226 Difference]: Without dead ends: 21 [2020-11-30 02:22:49,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:22:49,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-30 02:22:49,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-30 02:22:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 02:22:49,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-11-30 02:22:49,866 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 5 [2020-11-30 02:22:49,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:22:49,867 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-30 02:22:49,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:22:49,867 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-11-30 02:22:49,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:22:49,868 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:22:49,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:22:49,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 02:22:49,868 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:22:49,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:22:49,869 INFO L82 PathProgramCache]: Analyzing trace with hash 95438514, now seen corresponding path program 1 times [2020-11-30 02:22:49,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:22:49,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978597360] [2020-11-30 02:22:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:22:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:22:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:22:49,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978597360] [2020-11-30 02:22:49,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:22:49,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:22:49,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049196326] [2020-11-30 02:22:49,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:22:49,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:22:49,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:22:49,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:22:49,968 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2020-11-30 02:22:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:22:50,041 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-11-30 02:22:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:22:50,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-30 02:22:50,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:22:50,043 INFO L225 Difference]: With dead ends: 22 [2020-11-30 02:22:50,043 INFO L226 Difference]: Without dead ends: 22 [2020-11-30 02:22:50,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:22:50,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-30 02:22:50,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-30 02:22:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 02:22:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-30 02:22:50,046 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 5 [2020-11-30 02:22:50,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:22:50,047 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-30 02:22:50,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:22:50,047 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-30 02:22:50,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:22:50,047 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:22:50,048 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-11-30 02:22:50,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 02:22:50,050 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:22:50,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:22:50,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1522153131, now seen corresponding path program 1 times [2020-11-30 02:22:50,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:22:50,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920686518] [2020-11-30 02:22:50,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:22:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:22:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:22:50,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920686518] [2020-11-30 02:22:50,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047428696] [2020-11-30 02:22:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:22:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:22:50,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:22:50,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:22:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:22:50,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:22:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:22:50,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1869869802] [2020-11-30 02:22:50,272 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-30 02:22:50,272 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:22:50,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:22:50,283 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:22:50,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:22:51,015 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:22:51,304 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-11-30 02:22:51,483 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-11-30 02:22:51,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:22:51,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2020-11-30 02:22:51,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496094886] [2020-11-30 02:22:51,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:22:51,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:22:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:22:51,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-30 02:22:51,510 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-11-30 02:22:51,725 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-11-30 02:22:51,959 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-11-30 02:22:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:22:52,104 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-11-30 02:22:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:22:52,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-30 02:22:52,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:22:52,106 INFO L225 Difference]: With dead ends: 30 [2020-11-30 02:22:52,106 INFO L226 Difference]: Without dead ends: 30 [2020-11-30 02:22:52,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-11-30 02:22:52,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-30 02:22:52,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-11-30 02:22:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-30 02:22:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-11-30 02:22:52,111 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 7 [2020-11-30 02:22:52,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:22:52,111 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-11-30 02:22:52,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:22:52,111 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-11-30 02:22:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 02:22:52,114 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:22:52,115 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-11-30 02:22:52,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 02:22:52,337 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:22:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:22:52,337 INFO L82 PathProgramCache]: Analyzing trace with hash -57893141, now seen corresponding path program 1 times [2020-11-30 02:22:52,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:22:52,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636192322] [2020-11-30 02:22:52,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:22:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:22:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:22:52,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636192322] [2020-11-30 02:22:52,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:22:52,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:22:52,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346676301] [2020-11-30 02:22:52,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:22:52,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:22:52,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:22:52,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:22:52,408 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2020-11-30 02:22:52,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:22:52,494 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-11-30 02:22:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:22:52,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-30 02:22:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:22:52,496 INFO L225 Difference]: With dead ends: 28 [2020-11-30 02:22:52,496 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 02:22:52,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:22:52,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 02:22:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-11-30 02:22:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 02:22:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-11-30 02:22:52,500 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 8 [2020-11-30 02:22:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:22:52,501 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-11-30 02:22:52,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:22:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-11-30 02:22:52,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:22:52,501 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:22:52,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:22:52,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-30 02:22:52,502 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:22:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:22:52,503 INFO L82 PathProgramCache]: Analyzing trace with hash 262840021, now seen corresponding path program 1 times [2020-11-30 02:22:52,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:22:52,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990910162] [2020-11-30 02:22:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:22:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:22:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:22:52,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990910162] [2020-11-30 02:22:52,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473834710] [2020-11-30 02:22:52,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:22:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:22:52,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:22:52,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:22:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:22:52,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:22:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:22:52,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-30 02:22:52,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 5 [2020-11-30 02:22:52,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333000353] [2020-11-30 02:22:52,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:22:52,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:22:52,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:22:52,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:22:52,621 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2020-11-30 02:22:52,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:22:52,647 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-11-30 02:22:52,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:22:52,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-11-30 02:22:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:22:52,652 INFO L225 Difference]: With dead ends: 23 [2020-11-30 02:22:52,652 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 02:22:52,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:22:52,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 02:22:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-30 02:22:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 02:22:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-30 02:22:52,656 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2020-11-30 02:22:52,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:22:52,656 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-30 02:22:52,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:22:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-30 02:22:52,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:22:52,657 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:22:52,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:22:52,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:22:52,868 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:22:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:22:52,869 INFO L82 PathProgramCache]: Analyzing trace with hash 262840022, now seen corresponding path program 1 times [2020-11-30 02:22:52,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:22:52,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656743410] [2020-11-30 02:22:52,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:22:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:22:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:22:52,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656743410] [2020-11-30 02:22:52,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344312021] [2020-11-30 02:22:52,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:22:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:22:52,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:22:52,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:22:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:22:53,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:22:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:22:53,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1367618570] [2020-11-30 02:22:53,067 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 02:22:53,068 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:22:53,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:22:53,068 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:22:53,068 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:22:53,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:22:53,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:22:53,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:22:54,264 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:22:54,851 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-11-30 02:22:55,038 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-11-30 02:22:55,254 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-11-30 02:22:55,515 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-11-30 02:22:55,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:22:55,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 4, 4] total 13 [2020-11-30 02:22:55,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803769459] [2020-11-30 02:22:55,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:22:55,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:22:55,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:22:55,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-30 02:22:55,658 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-11-30 02:22:56,215 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2020-11-30 02:22:56,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:22:56,377 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-11-30 02:22:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:22:56,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-30 02:22:56,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:22:56,378 INFO L225 Difference]: With dead ends: 24 [2020-11-30 02:22:56,378 INFO L226 Difference]: Without dead ends: 24 [2020-11-30 02:22:56,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-11-30 02:22:56,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-30 02:22:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-11-30 02:22:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 02:22:56,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-30 02:22:56,381 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2020-11-30 02:22:56,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:22:56,382 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-30 02:22:56,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:22:56,382 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-30 02:22:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 02:22:56,382 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:22:56,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:22:56,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-30 02:22:56,583 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:22:56,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:22:56,584 INFO L82 PathProgramCache]: Analyzing trace with hash -813808975, now seen corresponding path program 1 times [2020-11-30 02:22:56,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:22:56,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189556177] [2020-11-30 02:22:56,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:22:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:22:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:22:56,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189556177] [2020-11-30 02:22:56,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874898279] [2020-11-30 02:22:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:22:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:22:56,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:22:56,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:22:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:22:56,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:22:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:22:56,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [32996514] [2020-11-30 02:22:56,769 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-30 02:22:56,769 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:22:56,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:22:56,770 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:22:56,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:22:56,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:22:56,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:22:56,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:22:57,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:22:57,933 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:22:58,433 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-11-30 02:22:58,660 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-11-30 02:22:58,816 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-11-30 02:22:59,046 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-11-30 02:22:59,432 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:22:59,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:22:59,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2020-11-30 02:22:59,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109183014] [2020-11-30 02:22:59,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 02:22:59,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:22:59,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 02:22:59,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:22:59,435 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-11-30 02:22:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:22:59,723 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-11-30 02:22:59,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 02:22:59,724 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-30 02:22:59,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:22:59,725 INFO L225 Difference]: With dead ends: 65 [2020-11-30 02:22:59,725 INFO L226 Difference]: Without dead ends: 65 [2020-11-30 02:22:59,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-11-30 02:22:59,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-11-30 02:22:59,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2020-11-30 02:22:59,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-30 02:22:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-11-30 02:22:59,732 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 12 [2020-11-30 02:22:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:22:59,732 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-11-30 02:22:59,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 02:22:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-11-30 02:22:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-30 02:22:59,734 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:22:59,734 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 1, 1, 1] [2020-11-30 02:22:59,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:22:59,948 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:22:59,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:22:59,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1035171327, now seen corresponding path program 1 times [2020-11-30 02:22:59,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:22:59,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149507151] [2020-11-30 02:22:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:22:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:23:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-30 02:23:00,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149507151] [2020-11-30 02:23:00,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271311985] [2020-11-30 02:23:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:23:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:23:00,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 02:23:00,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:23:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-30 02:23:00,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:23:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-30 02:23:00,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [101800063] [2020-11-30 02:23:00,420 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:23:00,420 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:23:00,421 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:23:00,421 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:23:00,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:23:00,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:00,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:00,724 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:01,428 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:23:01,668 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-11-30 02:23:02,126 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-11-30 02:23:02,263 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-11-30 02:23:02,413 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-11-30 02:23:02,714 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-11-30 02:23:02,818 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:23:02,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:23:02,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2020-11-30 02:23:02,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052495104] [2020-11-30 02:23:02,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 02:23:02,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:23:02,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 02:23:02,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-11-30 02:23:02,821 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 17 states. [2020-11-30 02:23:02,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:23:02,934 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-11-30 02:23:02,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 02:23:02,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-11-30 02:23:02,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:23:02,941 INFO L225 Difference]: With dead ends: 79 [2020-11-30 02:23:02,941 INFO L226 Difference]: Without dead ends: 79 [2020-11-30 02:23:02,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-11-30 02:23:02,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-30 02:23:02,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-11-30 02:23:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-30 02:23:02,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2020-11-30 02:23:02,954 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 31 [2020-11-30 02:23:02,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:23:02,955 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2020-11-30 02:23:02,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 02:23:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2020-11-30 02:23:02,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-30 02:23:02,960 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:23:02,961 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 2, 2, 1, 1, 1] [2020-11-30 02:23:03,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-11-30 02:23:03,176 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:23:03,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:23:03,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1659153023, now seen corresponding path program 2 times [2020-11-30 02:23:03,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:23:03,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028110737] [2020-11-30 02:23:03,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:23:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:23:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 322 proven. 145 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-11-30 02:23:03,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028110737] [2020-11-30 02:23:03,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979908631] [2020-11-30 02:23:03,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:23:03,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 02:23:03,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:23:03,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 02:23:03,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:23:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 323 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-11-30 02:23:03,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:23:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 323 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-11-30 02:23:03,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977037359] [2020-11-30 02:23:03,829 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:23:03,829 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:23:03,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:23:03,830 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:23:03,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:23:03,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:04,026 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:04,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:04,609 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:23:04,820 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-11-30 02:23:05,267 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-11-30 02:23:05,413 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-11-30 02:23:05,576 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-11-30 02:23:06,110 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-11-30 02:23:06,449 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:23:06,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:23:06,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 3, 2] total 18 [2020-11-30 02:23:06,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774711816] [2020-11-30 02:23:06,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 02:23:06,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:23:06,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 02:23:06,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-11-30 02:23:06,452 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand 18 states. [2020-11-30 02:23:08,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:23:08,440 INFO L93 Difference]: Finished difference Result 202 states and 212 transitions. [2020-11-30 02:23:08,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-11-30 02:23:08,441 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-11-30 02:23:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:23:08,442 INFO L225 Difference]: With dead ends: 202 [2020-11-30 02:23:08,443 INFO L226 Difference]: Without dead ends: 202 [2020-11-30 02:23:08,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 171 SyntacticMatches, 20 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1161, Invalid=3395, Unknown=0, NotChecked=0, Total=4556 [2020-11-30 02:23:08,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-30 02:23:08,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 192. [2020-11-30 02:23:08,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-11-30 02:23:08,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 202 transitions. [2020-11-30 02:23:08,476 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 202 transitions. Word has length 67 [2020-11-30 02:23:08,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:23:08,477 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 202 transitions. [2020-11-30 02:23:08,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 02:23:08,477 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 202 transitions. [2020-11-30 02:23:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-30 02:23:08,480 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:23:08,480 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-30 02:23:08,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:23:08,681 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:23:08,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:23:08,681 INFO L82 PathProgramCache]: Analyzing trace with hash -551879048, now seen corresponding path program 2 times [2020-11-30 02:23:08,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:23:08,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970629542] [2020-11-30 02:23:08,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:23:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:23:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 388 proven. 176 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-11-30 02:23:08,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970629542] [2020-11-30 02:23:08,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124946912] [2020-11-30 02:23:08,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:23:08,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-30 02:23:08,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:23:08,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:23:08,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:23:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2020-11-30 02:23:09,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:23:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2020-11-30 02:23:09,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-30 02:23:09,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [14] total 18 [2020-11-30 02:23:09,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116555289] [2020-11-30 02:23:09,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:23:09,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:23:09,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:23:09,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:23:09,128 INFO L87 Difference]: Start difference. First operand 192 states and 202 transitions. Second operand 6 states. [2020-11-30 02:23:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:23:09,169 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2020-11-30 02:23:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:23:09,170 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-11-30 02:23:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:23:09,172 INFO L225 Difference]: With dead ends: 191 [2020-11-30 02:23:09,172 INFO L226 Difference]: Without dead ends: 190 [2020-11-30 02:23:09,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:23:09,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-11-30 02:23:09,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-11-30 02:23:09,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-11-30 02:23:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 196 transitions. [2020-11-30 02:23:09,201 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 196 transitions. Word has length 78 [2020-11-30 02:23:09,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:23:09,202 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 196 transitions. [2020-11-30 02:23:09,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:23:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 196 transitions. [2020-11-30 02:23:09,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-30 02:23:09,204 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:23:09,204 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-30 02:23:09,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:23:09,422 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:23:09,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:23:09,422 INFO L82 PathProgramCache]: Analyzing trace with hash 71621074, now seen corresponding path program 1 times [2020-11-30 02:23:09,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:23:09,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760203013] [2020-11-30 02:23:09,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:23:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:23:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 388 proven. 176 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-11-30 02:23:09,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760203013] [2020-11-30 02:23:09,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942071760] [2020-11-30 02:23:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:23:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:23:09,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 02:23:09,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:23:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 388 proven. 176 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-11-30 02:23:10,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:23:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 388 proven. 176 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-11-30 02:23:10,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1713061738] [2020-11-30 02:23:10,791 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 02:23:10,791 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:23:10,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:23:10,791 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:23:10,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:23:10,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:10,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:11,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:11,746 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:23:12,360 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-11-30 02:23:12,529 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-11-30 02:23:12,709 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-11-30 02:23:13,372 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-11-30 02:23:14,070 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:23:14,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:23:14,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2020-11-30 02:23:14,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111253170] [2020-11-30 02:23:14,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-30 02:23:14,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:23:14,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-30 02:23:14,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=1412, Unknown=0, NotChecked=0, Total=2070 [2020-11-30 02:23:14,073 INFO L87 Difference]: Start difference. First operand 188 states and 196 transitions. Second operand 38 states. [2020-11-30 02:23:14,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:23:14,439 INFO L93 Difference]: Finished difference Result 383 states and 391 transitions. [2020-11-30 02:23:14,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-30 02:23:14,440 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2020-11-30 02:23:14,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:23:14,442 INFO L225 Difference]: With dead ends: 383 [2020-11-30 02:23:14,442 INFO L226 Difference]: Without dead ends: 383 [2020-11-30 02:23:14,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 183 SyntacticMatches, 22 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=658, Invalid=1412, Unknown=0, NotChecked=0, Total=2070 [2020-11-30 02:23:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-11-30 02:23:14,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2020-11-30 02:23:14,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-11-30 02:23:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 391 transitions. [2020-11-30 02:23:14,476 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 391 transitions. Word has length 79 [2020-11-30 02:23:14,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:23:14,479 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 391 transitions. [2020-11-30 02:23:14,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-30 02:23:14,480 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 391 transitions. [2020-11-30 02:23:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-30 02:23:14,485 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:23:14,486 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-30 02:23:14,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-11-30 02:23:14,705 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:23:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:23:14,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1979709856, now seen corresponding path program 2 times [2020-11-30 02:23:14,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:23:14,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330033801] [2020-11-30 02:23:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:23:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:23:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3487 backedges. 1779 proven. 852 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2020-11-30 02:23:15,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330033801] [2020-11-30 02:23:15,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900303567] [2020-11-30 02:23:15,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:23:15,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 02:23:15,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:23:15,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:23:15,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:23:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3487 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3483 trivial. 0 not checked. [2020-11-30 02:23:15,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:23:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3487 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3483 trivial. 0 not checked. [2020-11-30 02:23:15,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1911074670] [2020-11-30 02:23:15,945 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 02:23:15,945 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:23:15,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:23:15,945 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:23:15,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:23:15,992 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:16,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:16,130 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:16,801 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:23:17,312 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-11-30 02:23:17,468 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-11-30 02:23:17,632 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-11-30 02:23:19,167 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-11-30 02:23:20,613 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:23:20,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:23:20,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 4, 4] total 35 [2020-11-30 02:23:20,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769452836] [2020-11-30 02:23:20,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-30 02:23:20,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:23:20,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-30 02:23:20,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=1390, Unknown=0, NotChecked=0, Total=1806 [2020-11-30 02:23:20,616 INFO L87 Difference]: Start difference. First operand 383 states and 391 transitions. Second operand 35 states. [2020-11-30 02:23:30,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:23:30,984 INFO L93 Difference]: Finished difference Result 417 states and 425 transitions. [2020-11-30 02:23:30,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-11-30 02:23:30,985 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 157 [2020-11-30 02:23:30,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:23:30,988 INFO L225 Difference]: With dead ends: 417 [2020-11-30 02:23:30,988 INFO L226 Difference]: Without dead ends: 417 [2020-11-30 02:23:30,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 407 SyntacticMatches, 48 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10391 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=7686, Invalid=21044, Unknown=0, NotChecked=0, Total=28730 [2020-11-30 02:23:30,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-11-30 02:23:31,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 407. [2020-11-30 02:23:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-11-30 02:23:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 415 transitions. [2020-11-30 02:23:31,007 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 415 transitions. Word has length 157 [2020-11-30 02:23:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:23:31,008 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 415 transitions. [2020-11-30 02:23:31,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-30 02:23:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 415 transitions. [2020-11-30 02:23:31,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-11-30 02:23:31,011 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:23:31,011 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 5, 4, 4, 2, 2, 2, 1, 1, 1] [2020-11-30 02:23:31,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:23:31,224 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:23:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:23:31,225 INFO L82 PathProgramCache]: Analyzing trace with hash -59767779, now seen corresponding path program 3 times [2020-11-30 02:23:31,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:23:31,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734100873] [2020-11-30 02:23:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:23:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:23:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3806 backedges. 1928 proven. 925 refuted. 0 times theorem prover too weak. 953 trivial. 0 not checked. [2020-11-30 02:23:32,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734100873] [2020-11-30 02:23:32,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401141916] [2020-11-30 02:23:32,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:23:32,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 02:23:32,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:23:32,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 02:23:32,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:23:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3806 backedges. 0 proven. 1930 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2020-11-30 02:23:32,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:23:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3806 backedges. 0 proven. 1930 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2020-11-30 02:23:32,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [888934651] [2020-11-30 02:23:32,638 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 02:23:32,639 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:23:32,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:23:32,639 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:23:32,640 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:23:32,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:32,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:32,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:33,479 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:23:34,126 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-11-30 02:23:34,324 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-11-30 02:23:34,532 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-11-30 02:23:36,121 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-11-30 02:23:37,794 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:23:37,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:23:37,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 4, 4] total 34 [2020-11-30 02:23:37,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408240192] [2020-11-30 02:23:37,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-30 02:23:37,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:23:37,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-30 02:23:37,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=1291, Unknown=0, NotChecked=0, Total=1722 [2020-11-30 02:23:37,797 INFO L87 Difference]: Start difference. First operand 407 states and 415 transitions. Second operand 34 states. [2020-11-30 02:23:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:23:48,567 INFO L93 Difference]: Finished difference Result 523 states and 530 transitions. [2020-11-30 02:23:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2020-11-30 02:23:48,568 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 172 [2020-11-30 02:23:48,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:23:48,572 INFO L225 Difference]: With dead ends: 523 [2020-11-30 02:23:48,572 INFO L226 Difference]: Without dead ends: 523 [2020-11-30 02:23:48,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 452 SyntacticMatches, 50 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14438 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=10766, Invalid=28240, Unknown=0, NotChecked=0, Total=39006 [2020-11-30 02:23:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-11-30 02:23:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 504. [2020-11-30 02:23:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-11-30 02:23:48,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 512 transitions. [2020-11-30 02:23:48,595 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 512 transitions. Word has length 172 [2020-11-30 02:23:48,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:23:48,596 INFO L481 AbstractCegarLoop]: Abstraction has 504 states and 512 transitions. [2020-11-30 02:23:48,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-30 02:23:48,596 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 512 transitions. [2020-11-30 02:23:48,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-11-30 02:23:48,605 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:23:48,606 INFO L422 BasicCegarLoop]: trace histogram [130, 130, 130, 5, 5, 4, 1, 1] [2020-11-30 02:23:48,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2020-11-30 02:23:48,824 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:23:48,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:23:48,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1487269935, now seen corresponding path program 3 times [2020-11-30 02:23:48,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:23:48,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386480459] [2020-11-30 02:23:48,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:23:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:23:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 25835 backedges. 8328 proven. 1001 refuted. 0 times theorem prover too weak. 16506 trivial. 0 not checked. [2020-11-30 02:23:50,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386480459] [2020-11-30 02:23:50,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580158867] [2020-11-30 02:23:50,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:23:51,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 02:23:51,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:23:51,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 1483 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-30 02:23:51,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:23:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25835 backedges. 8328 proven. 1001 refuted. 0 times theorem prover too weak. 16506 trivial. 0 not checked. [2020-11-30 02:23:53,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:23:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 25835 backedges. 8328 proven. 1001 refuted. 0 times theorem prover too weak. 16506 trivial. 0 not checked. [2020-11-30 02:23:55,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [766988350] [2020-11-30 02:23:55,716 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:23:55,716 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:23:55,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:23:55,717 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:23:55,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:23:55,792 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:55,910 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:55,918 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:56,291 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:23:56,566 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-11-30 02:23:57,259 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-11-30 02:23:57,477 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-11-30 02:23:57,688 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-11-30 02:24:00,023 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-11-30 02:24:08,501 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:24:08,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:24:08,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 83 [2020-11-30 02:24:08,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938829786] [2020-11-30 02:24:08,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-11-30 02:24:08,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:08,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-11-30 02:24:08,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2605, Invalid=5051, Unknown=0, NotChecked=0, Total=7656 [2020-11-30 02:24:08,505 INFO L87 Difference]: Start difference. First operand 504 states and 512 transitions. Second operand 83 states. [2020-11-30 02:24:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:08,783 INFO L93 Difference]: Finished difference Result 612 states and 620 transitions. [2020-11-30 02:24:08,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-30 02:24:08,791 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 406 [2020-11-30 02:24:08,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:08,794 INFO L225 Difference]: With dead ends: 612 [2020-11-30 02:24:08,795 INFO L226 Difference]: Without dead ends: 612 [2020-11-30 02:24:08,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1245 GetRequests, 1029 SyntacticMatches, 130 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15517 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=2605, Invalid=5051, Unknown=0, NotChecked=0, Total=7656 [2020-11-30 02:24:08,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-11-30 02:24:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2020-11-30 02:24:08,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2020-11-30 02:24:08,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 620 transitions. [2020-11-30 02:24:08,810 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 620 transitions. Word has length 406 [2020-11-30 02:24:08,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:08,811 INFO L481 AbstractCegarLoop]: Abstraction has 612 states and 620 transitions. [2020-11-30 02:24:08,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-11-30 02:24:08,811 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 620 transitions. [2020-11-30 02:24:08,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-11-30 02:24:08,823 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:08,824 INFO L422 BasicCegarLoop]: trace histogram [160, 160, 160, 5, 5, 4, 1, 1] [2020-11-30 02:24:09,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2020-11-30 02:24:09,040 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:24:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:09,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1485793615, now seen corresponding path program 4 times [2020-11-30 02:24:09,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:09,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127819196] [2020-11-30 02:24:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 38990 backedges. 0 proven. 31390 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2020-11-30 02:24:10,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127819196] [2020-11-30 02:24:10,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980125828] [2020-11-30 02:24:10,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:24:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:11,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-30 02:24:11,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:24:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 38990 backedges. 0 proven. 31390 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2020-11-30 02:24:13,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:24:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 38990 backedges. 0 proven. 31390 refuted. 0 times theorem prover too weak. 7600 trivial. 0 not checked. [2020-11-30 02:24:14,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2005124836] [2020-11-30 02:24:14,193 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:24:14,193 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:24:14,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:24:14,194 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:24:14,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:24:14,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:24:14,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:24:14,416 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:24:14,919 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:24:15,256 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-11-30 02:24:15,917 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-11-30 02:24:16,138 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-11-30 02:24:16,392 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-11-30 02:24:18,287 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-11-30 02:24:24,586 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:24:24,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:24:24,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 16 [2020-11-30 02:24:24,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079581418] [2020-11-30 02:24:24,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 02:24:24,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:24,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 02:24:24,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-11-30 02:24:24,589 INFO L87 Difference]: Start difference. First operand 612 states and 620 transitions. Second operand 18 states. [2020-11-30 02:24:25,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:25,243 INFO L93 Difference]: Finished difference Result 1106 states and 1122 transitions. [2020-11-30 02:24:25,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 02:24:25,246 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 496 [2020-11-30 02:24:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:25,255 INFO L225 Difference]: With dead ends: 1106 [2020-11-30 02:24:25,255 INFO L226 Difference]: Without dead ends: 1106 [2020-11-30 02:24:25,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1495 GetRequests, 1310 SyntacticMatches, 160 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2020-11-30 02:24:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2020-11-30 02:24:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1106. [2020-11-30 02:24:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1106 states. [2020-11-30 02:24:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1122 transitions. [2020-11-30 02:24:25,286 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1122 transitions. Word has length 496 [2020-11-30 02:24:25,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:25,288 INFO L481 AbstractCegarLoop]: Abstraction has 1106 states and 1122 transitions. [2020-11-30 02:24:25,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 02:24:25,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1122 transitions. [2020-11-30 02:24:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2020-11-30 02:24:25,294 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:25,295 INFO L422 BasicCegarLoop]: trace histogram [192, 192, 192, 6, 6, 6, 5, 4, 4, 1, 1, 1] [2020-11-30 02:24:25,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:24:25,521 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:24:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:25,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1681750897, now seen corresponding path program 4 times [2020-11-30 02:24:25,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:25,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179746461] [2020-11-30 02:24:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 56237 backedges. 0 proven. 47091 refuted. 0 times theorem prover too weak. 9146 trivial. 0 not checked. [2020-11-30 02:24:26,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179746461] [2020-11-30 02:24:26,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979232504] [2020-11-30 02:24:26,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:24:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:27,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 2191 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 02:24:27,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:24:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 56237 backedges. 0 proven. 47091 refuted. 0 times theorem prover too weak. 9146 trivial. 0 not checked. [2020-11-30 02:24:27,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:24:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 56237 backedges. 0 proven. 47091 refuted. 0 times theorem prover too weak. 9146 trivial. 0 not checked. [2020-11-30 02:24:28,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1949755468] [2020-11-30 02:24:28,033 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 02:24:28,034 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:24:28,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:24:28,034 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:24:28,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:24:28,092 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:24:28,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:24:28,241 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:24:28,863 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:24:29,566 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-11-30 02:24:29,767 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-11-30 02:24:29,978 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-11-30 02:24:31,207 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-11-30 02:24:36,590 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:24:36,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:24:36,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2020-11-30 02:24:36,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960572276] [2020-11-30 02:24:36,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 02:24:36,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:36,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 02:24:36,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-11-30 02:24:36,594 INFO L87 Difference]: Start difference. First operand 1106 states and 1122 transitions. Second operand 17 states. [2020-11-30 02:24:36,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:36,949 INFO L93 Difference]: Finished difference Result 1445 states and 1460 transitions. [2020-11-30 02:24:36,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 02:24:36,950 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 610 [2020-11-30 02:24:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:36,960 INFO L225 Difference]: With dead ends: 1445 [2020-11-30 02:24:36,960 INFO L226 Difference]: Without dead ends: 1445 [2020-11-30 02:24:36,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1836 GetRequests, 1621 SyntacticMatches, 192 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4224 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-11-30 02:24:36,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2020-11-30 02:24:36,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1404. [2020-11-30 02:24:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1404 states. [2020-11-30 02:24:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1422 transitions. [2020-11-30 02:24:36,992 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1422 transitions. Word has length 610 [2020-11-30 02:24:36,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:36,993 INFO L481 AbstractCegarLoop]: Abstraction has 1404 states and 1422 transitions. [2020-11-30 02:24:36,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 02:24:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1422 transitions. [2020-11-30 02:24:37,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1091 [2020-11-30 02:24:37,005 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:37,005 INFO L422 BasicCegarLoop]: trace histogram [352, 352, 352, 11, 11, 10, 1, 1] [2020-11-30 02:24:37,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2020-11-30 02:24:37,211 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:24:37,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:37,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1517047409, now seen corresponding path program 5 times [2020-11-30 02:24:37,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:37,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448570998] [2020-11-30 02:24:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 189365 backedges. 0 proven. 172645 refuted. 0 times theorem prover too weak. 16720 trivial. 0 not checked. [2020-11-30 02:24:43,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448570998] [2020-11-30 02:24:43,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420406764] [2020-11-30 02:24:43,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:24:43,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 02:24:43,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:24:43,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 02:24:43,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:24:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 189365 backedges. 10 proven. 31380 refuted. 0 times theorem prover too weak. 157975 trivial. 0 not checked. [2020-11-30 02:24:48,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:24:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 189365 backedges. 0 proven. 31390 refuted. 0 times theorem prover too weak. 157975 trivial. 0 not checked. [2020-11-30 02:24:53,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1414075019] [2020-11-30 02:24:53,605 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:24:53,605 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:24:53,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:24:53,606 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:24:53,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:24:53,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:24:53,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:24:53,760 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:24:54,247 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:24:54,672 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-11-30 02:24:55,440 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2020-11-30 02:24:55,687 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-11-30 02:24:55,952 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-11-30 02:24:58,846 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-11-30 02:25:27,238 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:25:27,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:25:27,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 17 [2020-11-30 02:25:27,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111790975] [2020-11-30 02:25:27,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-30 02:25:27,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:25:27,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-30 02:25:27,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2020-11-30 02:25:27,244 INFO L87 Difference]: Start difference. First operand 1404 states and 1422 transitions. Second operand 19 states. [2020-11-30 02:25:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:25:29,318 INFO L93 Difference]: Finished difference Result 1402 states and 1417 transitions. [2020-11-30 02:25:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-30 02:25:29,320 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1090 [2020-11-30 02:25:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:25:29,323 INFO L225 Difference]: With dead ends: 1402 [2020-11-30 02:25:29,323 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:25:29,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3293 GetRequests, 2905 SyntacticMatches, 352 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2226 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2020-11-30 02:25:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:25:29,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:25:29,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:25:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:25:29,324 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1090 [2020-11-30 02:25:29,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:25:29,325 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:25:29,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-30 02:25:29,325 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:25:29,325 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:25:29,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:25:29,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:25:29 BoogieIcfgContainer [2020-11-30 02:25:29,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:25:29,530 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:25:29,530 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:25:29,531 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:25:29,531 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:22:49" (3/4) ... [2020-11-30 02:25:29,534 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:25:29,559 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-30 02:25:29,559 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-30 02:25:29,560 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 02:25:29,596 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_57b2e222-731b-473c-8e88-795f465ff7c0/bin/utaipan/witness.graphml [2020-11-30 02:25:29,596 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:25:29,597 INFO L168 Benchmark]: Toolchain (without parser) took 161518.14 ms. Allocated memory was 104.9 MB in the beginning and 2.0 GB in the end (delta: 1.9 GB). Free memory was 84.8 MB in the beginning and 1.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 132.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:29,597 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 104.9 MB. Free memory is still 61.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:25:29,598 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.60 ms. Allocated memory is still 104.9 MB. Free memory was 84.8 MB in the beginning and 82.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:29,598 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.68 ms. Allocated memory is still 104.9 MB. Free memory was 82.7 MB in the beginning and 81.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:25:29,598 INFO L168 Benchmark]: Boogie Preprocessor took 45.80 ms. Allocated memory is still 104.9 MB. Free memory was 81.2 MB in the beginning and 80.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:29,599 INFO L168 Benchmark]: RCFGBuilder took 610.79 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 58.1 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:29,599 INFO L168 Benchmark]: TraceAbstraction took 160421.98 ms. Allocated memory was 104.9 MB in the beginning and 2.0 GB in the end (delta: 1.9 GB). Free memory was 57.6 MB in the beginning and 1.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 105.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:29,601 INFO L168 Benchmark]: Witness Printer took 65.78 ms. Allocated memory is still 2.0 GB. Free memory was 1.8 GB in the beginning and 1.8 GB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:25:29,603 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 104.9 MB. Free memory is still 61.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 322.60 ms. Allocated memory is still 104.9 MB. Free memory was 84.8 MB in the beginning and 82.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.68 ms. Allocated memory is still 104.9 MB. Free memory was 82.7 MB in the beginning and 81.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.80 ms. Allocated memory is still 104.9 MB. Free memory was 81.2 MB in the beginning and 80.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 610.79 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 58.1 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 160421.98 ms. Allocated memory was 104.9 MB in the beginning and 2.0 GB in the end (delta: 1.9 GB). Free memory was 57.6 MB in the beginning and 1.8 GB in the end (delta: -1.8 GB). Peak memory consumption was 105.6 MB. Max. memory is 16.1 GB. * Witness Printer took 65.78 ms. Allocated memory is still 2.0 GB. Free memory was 1.8 GB in the beginning and 1.8 GB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: 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: 160.3s, OverallIterations: 20, TraceHistogramMax: 352, AutomataDifference: 29.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 225 SDtfs, 2688 SDslu, 840 SDs, 0 SdLazy, 2392 SolverSat, 802 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10102 GetRequests, 8372 SyntacticMatches, 990 SemanticMatches, 740 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52607 ImplicationChecksByTransitivity, 113.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1404occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 143 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 26.6s InterpolantComputationTime, 6480 NumberOfCodeBlocks, 5124 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 9657 ConstructedInterpolants, 625 QuantifiedInterpolants, 74912310 SizeOfPredicates, 34 NumberOfNonLiveVariables, 7167 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 48 InterpolantComputations, 10 PerfectInterpolantSequences, 478715/959793 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]: 1941, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 16, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 47, TOOLS_POST_TIME[ms]: 792, 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: 45, TOOLS_QUANTIFIERELIM_TIME[ms]: 773, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 145, FLUID_QUERY_TIME[ms]: 5, FLUID_QUERIES: 84, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME[ms]: 460, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 5, DOMAIN_WIDEN_TIME[ms]: 532, DOMAIN_ISSUBSETEQ_APPLICATIONS: 7, DOMAIN_ISSUBSETEQ_TIME[ms]: 47, DOMAIN_ISBOTTOM_APPLICATIONS: 16, DOMAIN_ISBOTTOM_TIME[ms]: 47, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 1532, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 1531, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 7, 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]: 4, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 16, DAG_COMPRESSION_PROCESSED_NODES: 111, DAG_COMPRESSION_RETAINED_NODES: 51, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...