./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c -s /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 17:52:05,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:52:05,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:52:05,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:52:05,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:52:05,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:52:05,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:52:05,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:52:05,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:52:05,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:52:05,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:52:05,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:52:05,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:52:05,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:52:05,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:52:05,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:52:05,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:52:05,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:52:05,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:52:05,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:52:05,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:52:05,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:52:05,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:52:05,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:52:05,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:52:05,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:52:05,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:52:05,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:52:05,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:52:05,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:52:05,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:52:05,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:52:05,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:52:05,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:52:05,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:52:05,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:52:05,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:52:05,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:52:05,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:52:05,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:52:05,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:52:05,508 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 17:52:05,526 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:52:05,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:52:05,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:52:05,527 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:52:05,527 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:52:05,527 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:52:05,527 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:52:05,527 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:52:05,527 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:52:05,527 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:52:05,527 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:52:05,528 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:52:05,528 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:52:05,528 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:52:05,528 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:52:05,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 17:52:05,529 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 17:52:05,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:52:05,529 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:52:05,529 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 17:52:05,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:52:05,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:52:05,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:52:05,529 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 17:52:05,529 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 17:52:05,530 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 17:52:05,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:52:05,530 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:52:05,530 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:52:05,530 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:52:05,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:52:05,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:52:05,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:52:05,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:52:05,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:52:05,531 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:52:05,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:52:05,531 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:52:05,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:52:05,531 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_977f16df-7aeb-408c-a2d6-1935a938cc5a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4e278d158dd9e8a83bb0a2afcbaa26c6819a0f8 [2020-12-09 17:52:05,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:52:05,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:52:05,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:52:05,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:52:05,719 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:52:05,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2020-12-09 17:52:05,761 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/data/a438f4a57/5a10fad7918a4c7da68ac695852e49cc/FLAG89994089b [2020-12-09 17:52:06,117 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:52:06,117 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2020-12-09 17:52:06,121 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/data/a438f4a57/5a10fad7918a4c7da68ac695852e49cc/FLAG89994089b [2020-12-09 17:52:06,130 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/data/a438f4a57/5a10fad7918a4c7da68ac695852e49cc [2020-12-09 17:52:06,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:52:06,133 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:52:06,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:52:06,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:52:06,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:52:06,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:52:06" (1/1) ... [2020-12-09 17:52:06,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23e1522e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:06, skipping insertion in model container [2020-12-09 17:52:06,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:52:06" (1/1) ... [2020-12-09 17:52:06,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:52:06,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:52:06,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:52:06,261 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:52:06,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:52:06,282 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:52:06,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:06 WrapperNode [2020-12-09 17:52:06,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:52:06,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:52:06,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:52:06,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:52:06,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:06" (1/1) ... [2020-12-09 17:52:06,293 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:06" (1/1) ... [2020-12-09 17:52:06,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:52:06,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:52:06,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:52:06,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:52:06,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:06" (1/1) ... [2020-12-09 17:52:06,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:06" (1/1) ... [2020-12-09 17:52:06,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:06" (1/1) ... [2020-12-09 17:52:06,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:06" (1/1) ... [2020-12-09 17:52:06,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:06" (1/1) ... [2020-12-09 17:52:06,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:06" (1/1) ... [2020-12-09 17:52:06,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:06" (1/1) ... [2020-12-09 17:52:06,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:52:06,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:52:06,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:52:06,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:52:06,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:52:06,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 17:52:06,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:52:06,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:52:06,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 17:52:06,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:52:06,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 17:52:06,606 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:52:06,607 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 17:52:06,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:52:06 BoogieIcfgContainer [2020-12-09 17:52:06,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:52:06,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:52:06,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:52:06,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:52:06,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:52:06" (1/3) ... [2020-12-09 17:52:06,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e280ff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:52:06, skipping insertion in model container [2020-12-09 17:52:06,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:52:06" (2/3) ... [2020-12-09 17:52:06,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e280ff9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:52:06, skipping insertion in model container [2020-12-09 17:52:06,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:52:06" (3/3) ... [2020-12-09 17:52:06,614 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2020-12-09 17:52:06,626 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:52:06,628 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-09 17:52:06,635 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-09 17:52:06,650 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:52:06,650 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 17:52:06,650 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:52:06,651 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:52:06,651 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:52:06,651 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:52:06,651 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:52:06,651 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:52:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-09 17:52:06,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 17:52:06,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:06,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 17:52:06,665 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:06,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:06,669 INFO L82 PathProgramCache]: Analyzing trace with hash 3121969, now seen corresponding path program 1 times [2020-12-09 17:52:06,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:06,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218007117] [2020-12-09 17:52:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:06,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218007117] [2020-12-09 17:52:06,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:52:06,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:52:06,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358391497] [2020-12-09 17:52:06,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:52:06,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:06,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:52:06,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:52:06,814 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-12-09 17:52:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:06,862 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-12-09 17:52:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:52:06,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 17:52:06,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:06,869 INFO L225 Difference]: With dead ends: 37 [2020-12-09 17:52:06,869 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 17:52:06,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:52:06,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 17:52:06,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2020-12-09 17:52:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 17:52:06,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-09 17:52:06,898 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-12-09 17:52:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:06,898 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-09 17:52:06,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:52:06,898 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-09 17:52:06,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 17:52:06,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:06,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 17:52:06,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 17:52:06,899 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:06,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:06,900 INFO L82 PathProgramCache]: Analyzing trace with hash 3050837, now seen corresponding path program 1 times [2020-12-09 17:52:06,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:06,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400611578] [2020-12-09 17:52:06,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:06,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400611578] [2020-12-09 17:52:06,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:52:06,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 17:52:06,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786073536] [2020-12-09 17:52:06,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:52:06,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:06,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:52:06,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:52:06,940 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-12-09 17:52:06,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:06,959 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-09 17:52:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:52:06,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 17:52:06,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:06,960 INFO L225 Difference]: With dead ends: 18 [2020-12-09 17:52:06,960 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 17:52:06,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:52:06,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 17:52:06,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-09 17:52:06,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 17:52:06,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-09 17:52:06,963 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 4 [2020-12-09 17:52:06,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:06,963 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-09 17:52:06,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:52:06,963 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-09 17:52:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 17:52:06,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:06,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 17:52:06,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 17:52:06,964 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:06,964 INFO L82 PathProgramCache]: Analyzing trace with hash 3050838, now seen corresponding path program 1 times [2020-12-09 17:52:06,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:06,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171662600] [2020-12-09 17:52:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:07,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171662600] [2020-12-09 17:52:07,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:52:07,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 17:52:07,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417548659] [2020-12-09 17:52:07,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:52:07,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:07,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:52:07,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:52:07,002 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2020-12-09 17:52:07,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:07,032 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-12-09 17:52:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:52:07,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 17:52:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:07,033 INFO L225 Difference]: With dead ends: 25 [2020-12-09 17:52:07,033 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 17:52:07,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:52:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 17:52:07,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-09 17:52:07,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 17:52:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2020-12-09 17:52:07,036 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 4 [2020-12-09 17:52:07,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:07,036 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2020-12-09 17:52:07,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:52:07,036 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2020-12-09 17:52:07,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 17:52:07,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:07,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 17:52:07,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 17:52:07,037 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:07,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:07,038 INFO L82 PathProgramCache]: Analyzing trace with hash 3048869, now seen corresponding path program 1 times [2020-12-09 17:52:07,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:07,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147859175] [2020-12-09 17:52:07,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:07,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147859175] [2020-12-09 17:52:07,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:52:07,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:52:07,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786863567] [2020-12-09 17:52:07,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 17:52:07,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:07,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 17:52:07,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 17:52:07,064 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 4 states. [2020-12-09 17:52:07,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:07,106 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-09 17:52:07,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:52:07,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 17:52:07,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:07,107 INFO L225 Difference]: With dead ends: 38 [2020-12-09 17:52:07,107 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 17:52:07,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:52:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 17:52:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 20. [2020-12-09 17:52:07,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 17:52:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-09 17:52:07,110 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-12-09 17:52:07,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:07,110 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-09 17:52:07,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 17:52:07,110 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-09 17:52:07,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 17:52:07,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:07,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 17:52:07,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 17:52:07,110 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:07,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:07,111 INFO L82 PathProgramCache]: Analyzing trace with hash 694595734, now seen corresponding path program 1 times [2020-12-09 17:52:07,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:07,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202388865] [2020-12-09 17:52:07,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:07,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202388865] [2020-12-09 17:52:07,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34467416] [2020-12-09 17:52:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:07,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 17:52:07,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:52:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:07,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:52:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:07,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1871955723] [2020-12-09 17:52:07,225 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 17:52:07,225 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:52:07,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:52:07,231 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:52:07,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:52:07,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:07,500 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:52:07,673 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-12-09 17:52:07,846 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-12-09 17:52:07,974 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2020-12-09 17:52:07,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:52:07,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2020-12-09 17:52:07,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239099135] [2020-12-09 17:52:07,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:52:07,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:07,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:52:07,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-12-09 17:52:07,976 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-12-09 17:52:08,104 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-12-09 17:52:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:08,163 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-12-09 17:52:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:52:08,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-09 17:52:08,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:08,164 INFO L225 Difference]: With dead ends: 26 [2020-12-09 17:52:08,164 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 17:52:08,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2020-12-09 17:52:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 17:52:08,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-12-09 17:52:08,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 17:52:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-09 17:52:08,167 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 7 [2020-12-09 17:52:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:08,168 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-09 17:52:08,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:52:08,168 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-09 17:52:08,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 17:52:08,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:08,168 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-12-09 17:52:08,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:08,370 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:08,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:08,371 INFO L82 PathProgramCache]: Analyzing trace with hash 694522633, now seen corresponding path program 1 times [2020-12-09 17:52:08,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:08,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678243373] [2020-12-09 17:52:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:08,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678243373] [2020-12-09 17:52:08,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650151630] [2020-12-09 17:52:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:08,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 17:52:08,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:52:08,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:08,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:52:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:08,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108449409] [2020-12-09 17:52:08,507 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 17:52:08,507 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:52:08,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:52:08,507 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:52:08,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:52:08,610 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:08,653 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:52:08,859 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-12-09 17:52:09,040 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-12-09 17:52:09,193 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 52 [2020-12-09 17:52:09,331 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2020-12-09 17:52:09,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:52:09,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2020-12-09 17:52:09,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143047658] [2020-12-09 17:52:09,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:52:09,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:09,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:52:09,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-09 17:52:09,333 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-12-09 17:52:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:09,399 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-12-09 17:52:09,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:52:09,399 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-09 17:52:09,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:09,400 INFO L225 Difference]: With dead ends: 24 [2020-12-09 17:52:09,400 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 17:52:09,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-09 17:52:09,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 17:52:09,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-09 17:52:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 17:52:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-09 17:52:09,402 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2020-12-09 17:52:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:09,402 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-09 17:52:09,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:52:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-09 17:52:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:52:09,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:09,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 17:52:09,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-09 17:52:09,604 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:09,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1666401205, now seen corresponding path program 1 times [2020-12-09 17:52:09,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:09,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002998407] [2020-12-09 17:52:09,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 17:52:09,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002998407] [2020-12-09 17:52:09,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800068856] [2020-12-09 17:52:09,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:09,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 17:52:09,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:52:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 17:52:09,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:52:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 17:52:09,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752839367] [2020-12-09 17:52:09,775 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 17:52:09,775 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:52:09,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:52:09,776 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:52:09,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:52:09,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:09,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:09,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:10,282 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:10,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:10,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:10,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:10,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:10,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:10,444 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:10,467 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 17:52:10,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:52:10,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 6 [2020-12-09 17:52:10,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152708626] [2020-12-09 17:52:10,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 17:52:10,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:10,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 17:52:10,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-09 17:52:10,469 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2020-12-09 17:52:10,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:10,558 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2020-12-09 17:52:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 17:52:10,558 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-09 17:52:10,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:10,560 INFO L225 Difference]: With dead ends: 59 [2020-12-09 17:52:10,560 INFO L226 Difference]: Without dead ends: 59 [2020-12-09 17:52:10,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-09 17:52:10,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-09 17:52:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-12-09 17:52:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-09 17:52:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2020-12-09 17:52:10,565 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 10 [2020-12-09 17:52:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:10,565 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2020-12-09 17:52:10,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 17:52:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2020-12-09 17:52:10,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:52:10,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:10,565 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 17:52:10,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-09 17:52:10,766 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:10,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1666399236, now seen corresponding path program 1 times [2020-12-09 17:52:10,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:10,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359283772] [2020-12-09 17:52:10,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:10,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359283772] [2020-12-09 17:52:10,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812087594] [2020-12-09 17:52:10,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:10,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 17:52:10,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:52:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:11,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:52:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:52:11,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1190357758] [2020-12-09 17:52:11,041 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 17:52:11,041 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:52:11,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:52:11,041 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:52:11,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:52:11,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:11,160 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:11,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:11,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:11,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:11,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:11,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:11,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:11,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:11,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:11,639 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 17:52:11,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:52:11,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-12-09 17:52:11,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521081960] [2020-12-09 17:52:11,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 17:52:11,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:11,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 17:52:11,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-09 17:52:11,641 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand 10 states. [2020-12-09 17:52:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:11,755 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-12-09 17:52:11,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 17:52:11,755 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2020-12-09 17:52:11,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:11,756 INFO L225 Difference]: With dead ends: 53 [2020-12-09 17:52:11,756 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 17:52:11,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-12-09 17:52:11,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 17:52:11,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-12-09 17:52:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 17:52:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-12-09 17:52:11,760 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 10 [2020-12-09 17:52:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:11,760 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-12-09 17:52:11,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 17:52:11,760 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2020-12-09 17:52:11,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 17:52:11,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:11,760 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2020-12-09 17:52:11,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:11,962 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:11,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:11,963 INFO L82 PathProgramCache]: Analyzing trace with hash -499405208, now seen corresponding path program 2 times [2020-12-09 17:52:11,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:11,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956639842] [2020-12-09 17:52:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 17:52:12,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956639842] [2020-12-09 17:52:12,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171230328] [2020-12-09 17:52:12,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:12,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 17:52:12,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 17:52:12,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 17:52:12,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:52:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 17:52:12,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:52:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 17:52:12,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [336689193] [2020-12-09 17:52:12,232 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 17:52:12,232 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:52:12,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:52:12,232 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:52:12,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:52:12,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:12,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:12,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:12,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:12,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:12,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:12,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:12,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:12,691 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 17:52:12,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:52:12,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2020-12-09 17:52:12,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520913957] [2020-12-09 17:52:12,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 17:52:12,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:12,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 17:52:12,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-09 17:52:12,692 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 11 states. [2020-12-09 17:52:12,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:12,812 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-12-09 17:52:12,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 17:52:12,812 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-09 17:52:12,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:12,813 INFO L225 Difference]: With dead ends: 48 [2020-12-09 17:52:12,813 INFO L226 Difference]: Without dead ends: 48 [2020-12-09 17:52:12,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-12-09 17:52:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-09 17:52:12,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-12-09 17:52:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-09 17:52:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-12-09 17:52:12,817 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 13 [2020-12-09 17:52:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:12,817 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-12-09 17:52:12,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 17:52:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-12-09 17:52:12,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 17:52:12,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:12,817 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2020-12-09 17:52:13,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:13,019 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:13,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1046560043, now seen corresponding path program 1 times [2020-12-09 17:52:13,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:13,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487620924] [2020-12-09 17:52:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 17:52:13,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487620924] [2020-12-09 17:52:13,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491746241] [2020-12-09 17:52:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:13,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 17:52:13,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:52:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 17:52:13,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:52:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 17:52:13,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1985116775] [2020-12-09 17:52:13,250 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 17:52:13,250 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:52:13,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:52:13,251 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:52:13,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:52:13,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:13,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:13,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:13,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:13,618 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:13,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:13,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:13,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:13,733 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 17:52:13,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:52:13,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 2, 2] total 4 [2020-12-09 17:52:13,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483694923] [2020-12-09 17:52:13,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:52:13,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:13,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:52:13,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:52:13,734 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 5 states. [2020-12-09 17:52:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:13,756 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-12-09 17:52:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:52:13,756 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-09 17:52:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:13,757 INFO L225 Difference]: With dead ends: 39 [2020-12-09 17:52:13,757 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 17:52:13,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 17:52:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 17:52:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-09 17:52:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-09 17:52:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-12-09 17:52:13,760 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 14 [2020-12-09 17:52:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:13,761 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-12-09 17:52:13,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:52:13,761 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-12-09 17:52:13,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 17:52:13,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:13,761 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2020-12-09 17:52:13,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:13,963 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:13,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:13,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1046560044, now seen corresponding path program 1 times [2020-12-09 17:52:13,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:13,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159208351] [2020-12-09 17:52:13,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 17:52:14,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159208351] [2020-12-09 17:52:14,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900459111] [2020-12-09 17:52:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:14,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 17:52:14,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:52:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 17:52:14,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:52:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 17:52:14,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1589120785] [2020-12-09 17:52:14,149 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 17:52:14,149 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:52:14,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:52:14,149 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:52:14,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:52:14,204 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:14,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:14,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:14,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:14,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:14,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:14,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:14,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:14,593 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 17:52:14,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:52:14,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-09 17:52:14,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946422736] [2020-12-09 17:52:14,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:52:14,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:14,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:52:14,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 17:52:14,594 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2020-12-09 17:52:14,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:14,644 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2020-12-09 17:52:14,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:52:14,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-09 17:52:14,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:14,644 INFO L225 Difference]: With dead ends: 68 [2020-12-09 17:52:14,644 INFO L226 Difference]: Without dead ends: 68 [2020-12-09 17:52:14,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 17:52:14,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-09 17:52:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-12-09 17:52:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 17:52:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-12-09 17:52:14,648 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 14 [2020-12-09 17:52:14,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:14,648 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-12-09 17:52:14,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:52:14,648 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-12-09 17:52:14,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 17:52:14,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:14,648 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1] [2020-12-09 17:52:14,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-12-09 17:52:14,850 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:14,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:14,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1842774988, now seen corresponding path program 2 times [2020-12-09 17:52:14,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:14,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420383613] [2020-12-09 17:52:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 17:52:15,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420383613] [2020-12-09 17:52:15,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940820477] [2020-12-09 17:52:15,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:15,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 17:52:15,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 17:52:15,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 17:52:15,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:52:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-09 17:52:15,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:52:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-09 17:52:15,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1391083519] [2020-12-09 17:52:15,178 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 17:52:15,178 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:52:15,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:52:15,179 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:52:15,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:52:15,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:15,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:15,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:15,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:15,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:15,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:15,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:15,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:15,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:15,613 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 17:52:15,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:52:15,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 12 [2020-12-09 17:52:15,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635337607] [2020-12-09 17:52:15,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 17:52:15,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:15,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 17:52:15,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-12-09 17:52:15,614 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 14 states. [2020-12-09 17:52:15,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:15,948 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-12-09 17:52:15,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-09 17:52:15,948 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-12-09 17:52:15,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:15,949 INFO L225 Difference]: With dead ends: 65 [2020-12-09 17:52:15,949 INFO L226 Difference]: Without dead ends: 65 [2020-12-09 17:52:15,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=630, Unknown=0, NotChecked=0, Total=930 [2020-12-09 17:52:15,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-09 17:52:15,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2020-12-09 17:52:15,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-09 17:52:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-12-09 17:52:15,951 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 20 [2020-12-09 17:52:15,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:15,952 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-12-09 17:52:15,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 17:52:15,952 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-12-09 17:52:15,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 17:52:15,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:15,952 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-09 17:52:16,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-12-09 17:52:16,154 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:16,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:16,155 INFO L82 PathProgramCache]: Analyzing trace with hash 688991571, now seen corresponding path program 1 times [2020-12-09 17:52:16,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:16,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048808578] [2020-12-09 17:52:16,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 17:52:16,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048808578] [2020-12-09 17:52:16,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940907337] [2020-12-09 17:52:16,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:16,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 17:52:16,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:52:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 17:52:16,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:52:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 17:52:16,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1382425078] [2020-12-09 17:52:16,336 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 17:52:16,336 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:52:16,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:52:16,336 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:52:16,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:52:16,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:16,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:16,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:16,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:16,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:16,665 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:16,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:16,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:16,718 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:16,724 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 17:52:16,740 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 17:52:16,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:52:16,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2020-12-09 17:52:16,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016404016] [2020-12-09 17:52:16,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 17:52:16,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:16,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 17:52:16,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-09 17:52:16,741 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 12 states. [2020-12-09 17:52:16,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:16,865 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2020-12-09 17:52:16,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 17:52:16,865 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-12-09 17:52:16,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:16,866 INFO L225 Difference]: With dead ends: 52 [2020-12-09 17:52:16,866 INFO L226 Difference]: Without dead ends: 52 [2020-12-09 17:52:16,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-12-09 17:52:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-09 17:52:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2020-12-09 17:52:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 17:52:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-12-09 17:52:16,869 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 27 [2020-12-09 17:52:16,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:16,869 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-12-09 17:52:16,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 17:52:16,869 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-12-09 17:52:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-09 17:52:16,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:52:16,870 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-09 17:52:17,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:17,072 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:52:17,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:52:17,073 INFO L82 PathProgramCache]: Analyzing trace with hash -359526703, now seen corresponding path program 2 times [2020-12-09 17:52:17,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:52:17,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409479995] [2020-12-09 17:52:17,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:52:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:52:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-09 17:52:17,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409479995] [2020-12-09 17:52:17,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788027397] [2020-12-09 17:52:17,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:17,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 17:52:17,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 17:52:17,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 17:52:17,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:52:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-09 17:52:17,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:52:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-09 17:52:17,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 17:52:17,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6] total 10 [2020-12-09 17:52:17,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074349694] [2020-12-09 17:52:17,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:52:17,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:52:17,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:52:17,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-09 17:52:17,245 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 6 states. [2020-12-09 17:52:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:52:17,255 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-12-09 17:52:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:52:17,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-12-09 17:52:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:52:17,256 INFO L225 Difference]: With dead ends: 43 [2020-12-09 17:52:17,256 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 17:52:17,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-09 17:52:17,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 17:52:17,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 17:52:17,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 17:52:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 17:52:17,256 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-12-09 17:52:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:52:17,257 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 17:52:17,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:52:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 17:52:17,257 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 17:52:17,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:52:17,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:52:17 BoogieIcfgContainer [2020-12-09 17:52:17,469 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:52:17,471 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:52:17,471 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:52:17,471 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:52:17,472 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:52:06" (3/4) ... [2020-12-09 17:52:17,479 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 17:52:17,498 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2020-12-09 17:52:17,498 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-09 17:52:17,498 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 17:52:17,524 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_977f16df-7aeb-408c-a2d6-1935a938cc5a/bin/utaipan/witness.graphml [2020-12-09 17:52:17,524 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:52:17,525 INFO L168 Benchmark]: Toolchain (without parser) took 11392.08 ms. Allocated memory was 96.5 MB in the beginning and 174.1 MB in the end (delta: 77.6 MB). Free memory was 67.1 MB in the beginning and 100.0 MB in the end (delta: -32.8 MB). Peak memory consumption was 46.5 MB. Max. memory is 16.1 GB. [2020-12-09 17:52:17,525 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 96.5 MB. Free memory is still 73.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:52:17,525 INFO L168 Benchmark]: CACSL2BoogieTranslator took 148.67 ms. Allocated memory is still 96.5 MB. Free memory was 67.0 MB in the beginning and 57.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 17:52:17,526 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.29 ms. Allocated memory is still 96.5 MB. Free memory was 57.9 MB in the beginning and 56.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:52:17,526 INFO L168 Benchmark]: Boogie Preprocessor took 16.32 ms. Allocated memory is still 96.5 MB. Free memory was 56.5 MB in the beginning and 55.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:52:17,526 INFO L168 Benchmark]: RCFGBuilder took 284.53 ms. Allocated memory is still 96.5 MB. Free memory was 55.2 MB in the beginning and 56.4 MB in the end (delta: -1.1 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2020-12-09 17:52:17,526 INFO L168 Benchmark]: TraceAbstraction took 10860.18 ms. Allocated memory was 96.5 MB in the beginning and 174.1 MB in the end (delta: 77.6 MB). Free memory was 55.8 MB in the beginning and 102.1 MB in the end (delta: -46.2 MB). Peak memory consumption was 35.6 MB. Max. memory is 16.1 GB. [2020-12-09 17:52:17,527 INFO L168 Benchmark]: Witness Printer took 53.95 ms. Allocated memory is still 174.1 MB. Free memory was 102.1 MB in the beginning and 100.0 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:52:17,528 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 96.5 MB. Free memory is still 73.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 148.67 ms. Allocated memory is still 96.5 MB. Free memory was 67.0 MB in the beginning and 57.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 23.29 ms. Allocated memory is still 96.5 MB. Free memory was 57.9 MB in the beginning and 56.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.32 ms. Allocated memory is still 96.5 MB. Free memory was 56.5 MB in the beginning and 55.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 284.53 ms. Allocated memory is still 96.5 MB. Free memory was 55.2 MB in the beginning and 56.4 MB in the end (delta: -1.1 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10860.18 ms. Allocated memory was 96.5 MB in the beginning and 174.1 MB in the end (delta: 77.6 MB). Free memory was 55.8 MB in the beginning and 102.1 MB in the end (delta: -46.2 MB). Peak memory consumption was 35.6 MB. Max. memory is 16.1 GB. * Witness Printer took 53.95 ms. Allocated memory is still 174.1 MB. Free memory was 102.1 MB in the beginning and 100.0 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 15]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.8s, OverallIterations: 14, TraceHistogramMax: 5, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 126 SDtfs, 455 SDslu, 134 SDs, 0 SdLazy, 725 SolverSat, 192 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 400 GetRequests, 272 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 112 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 326 NumberOfCodeBlocks, 281 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 447 ConstructedInterpolants, 1 QuantifiedInterpolants, 62965 SizeOfPredicates, 35 NumberOfNonLiveVariables, 883 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 34 InterpolantComputations, 6 PerfectInterpolantSequences, 372/582 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 422, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 21, TOOLS_POST_TIME[ms]: 286, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 21, TOOLS_QUANTIFIERELIM_TIME[ms]: 275, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 66, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 43, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 88, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME[ms]: 7, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME[ms]: 10, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 293, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 293, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 1, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 6, DAG_COMPRESSION_PROCESSED_NODES: 72, DAG_COMPRESSION_RETAINED_NODES: 42, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...