./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/alternating_list-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/alternating_list-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash da856cb29218eae000c82400da3ef1c667e9f55c ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:57:28,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:57:28,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:57:28,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:57:28,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:57:28,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:57:28,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:57:28,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:57:28,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:57:28,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:57:28,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:57:28,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:57:28,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:57:28,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:57:28,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:57:28,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:57:28,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:57:28,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:57:28,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:57:28,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:57:28,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:57:28,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:57:28,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:57:28,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:57:28,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:57:28,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:57:28,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:57:28,571 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:57:28,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:57:28,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:57:28,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:57:28,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:57:28,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:57:28,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:57:28,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:57:28,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:57:28,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:57:28,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:57:28,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:57:28,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:57:28,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:57:28,585 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2020-11-22 12:57:28,625 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:57:28,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:57:28,627 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:57:28,627 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:57:28,628 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:57:28,628 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:57:28,628 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:57:28,628 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:57:28,628 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:57:28,629 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:57:28,630 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:57:28,630 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:57:28,630 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:57:28,630 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:57:28,631 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:57:28,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-22 12:57:28,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-22 12:57:28,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:57:28,632 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:57:28,632 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 12:57:28,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:57:28,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:57:28,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:57:28,633 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-22 12:57:28,633 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-22 12:57:28,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:57:28,635 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:57:28,635 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:57:28,636 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:57:28,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:57:28,636 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:57:28,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:57:28,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:57:28,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:57:28,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:57:28,638 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:57:28,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:57:28,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:57:28,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:57:28,638 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_ba410754-abef-46e1-b735-ac769f91f649/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da856cb29218eae000c82400da3ef1c667e9f55c [2020-11-22 12:57:28,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:57:28,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:57:28,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:57:28,969 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:57:28,970 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:57:28,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/bin/utaipan/../../sv-benchmarks/c/list-properties/alternating_list-2.i [2020-11-22 12:57:29,048 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/bin/utaipan/data/a0b332b70/9762b93f2f184018a29b765274a908a4/FLAGaf166830c [2020-11-22 12:57:29,584 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:57:29,584 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/sv-benchmarks/c/list-properties/alternating_list-2.i [2020-11-22 12:57:29,602 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/bin/utaipan/data/a0b332b70/9762b93f2f184018a29b765274a908a4/FLAGaf166830c [2020-11-22 12:57:29,897 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/bin/utaipan/data/a0b332b70/9762b93f2f184018a29b765274a908a4 [2020-11-22 12:57:29,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:57:29,900 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:57:29,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:57:29,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:57:29,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:57:29,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:57:29" (1/1) ... [2020-11-22 12:57:29,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24381278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:29, skipping insertion in model container [2020-11-22 12:57:29,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:57:29" (1/1) ... [2020-11-22 12:57:29,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:57:29,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:57:30,394 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:57:30,407 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:57:30,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:57:30,552 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:57:30,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30 WrapperNode [2020-11-22 12:57:30,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:57:30,555 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:57:30,555 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:57:30,555 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:57:30,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:57:30,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:57:30,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:57:30,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:57:30,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:57:30,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:57:30,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:57:30,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:57:30,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:57:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 12:57:30,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 12:57:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-22 12:57:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-22 12:57:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:57:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-22 12:57:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:57:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:57:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:57:30,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:57:31,490 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:57:31,490 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-22 12:57:31,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:57:31 BoogieIcfgContainer [2020-11-22 12:57:31,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:57:31,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:57:31,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:57:31,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:57:31,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:57:29" (1/3) ... [2020-11-22 12:57:31,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7282c25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:57:31, skipping insertion in model container [2020-11-22 12:57:31,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (2/3) ... [2020-11-22 12:57:31,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7282c25e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:57:31, skipping insertion in model container [2020-11-22 12:57:31,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:57:31" (3/3) ... [2020-11-22 12:57:31,502 INFO L111 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-11-22 12:57:31,515 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:57:31,520 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 30 error locations. [2020-11-22 12:57:31,531 INFO L253 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2020-11-22 12:57:31,560 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:57:31,560 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-22 12:57:31,560 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:57:31,560 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:57:31,560 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:57:31,561 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:57:31,561 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:57:31,561 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:57:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-11-22 12:57:31,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 12:57:31,587 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:31,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 12:57:31,588 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-22 12:57:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:31,595 INFO L82 PathProgramCache]: Analyzing trace with hash 5482218, now seen corresponding path program 1 times [2020-11-22 12:57:31,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:31,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942255645] [2020-11-22 12:57:31,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:31,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942255645] [2020-11-22 12:57:31,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:31,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:57:31,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936232358] [2020-11-22 12:57:31,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 12:57:31,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:31,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 12:57:31,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:57:31,786 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 2 states. [2020-11-22 12:57:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:31,804 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-11-22 12:57:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 12:57:31,806 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-11-22 12:57:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:31,815 INFO L225 Difference]: With dead ends: 67 [2020-11-22 12:57:31,815 INFO L226 Difference]: Without dead ends: 64 [2020-11-22 12:57:31,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:57:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-22 12:57:31,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-11-22 12:57:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-22 12:57:31,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-11-22 12:57:31,848 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 4 [2020-11-22 12:57:31,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:31,849 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-11-22 12:57:31,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 12:57:31,849 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-11-22 12:57:31,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:57:31,850 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:31,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:57:31,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:57:31,850 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-22 12:57:31,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:31,851 INFO L82 PathProgramCache]: Analyzing trace with hash 169913100, now seen corresponding path program 1 times [2020-11-22 12:57:31,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:31,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118113373] [2020-11-22 12:57:31,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:31,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118113373] [2020-11-22 12:57:31,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:31,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:57:31,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685170196] [2020-11-22 12:57:31,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:57:31,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:31,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:57:31,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:57:31,935 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 4 states. [2020-11-22 12:57:32,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:32,128 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-11-22 12:57:32,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:57:32,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-22 12:57:32,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:32,132 INFO L225 Difference]: With dead ends: 84 [2020-11-22 12:57:32,132 INFO L226 Difference]: Without dead ends: 84 [2020-11-22 12:57:32,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:57:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-22 12:57:32,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2020-11-22 12:57:32,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-22 12:57:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-11-22 12:57:32,142 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 5 [2020-11-22 12:57:32,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:32,142 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-11-22 12:57:32,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:57:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-11-22 12:57:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:57:32,143 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:32,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:57:32,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:57:32,144 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-22 12:57:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:32,144 INFO L82 PathProgramCache]: Analyzing trace with hash 169913101, now seen corresponding path program 1 times [2020-11-22 12:57:32,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:32,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573834647] [2020-11-22 12:57:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:32,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573834647] [2020-11-22 12:57:32,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:32,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:57:32,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022235991] [2020-11-22 12:57:32,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:57:32,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:32,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:57:32,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:57:32,225 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 4 states. [2020-11-22 12:57:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:32,405 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2020-11-22 12:57:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:57:32,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-22 12:57:32,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:32,407 INFO L225 Difference]: With dead ends: 89 [2020-11-22 12:57:32,407 INFO L226 Difference]: Without dead ends: 89 [2020-11-22 12:57:32,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:57:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-22 12:57:32,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-11-22 12:57:32,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-22 12:57:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-11-22 12:57:32,424 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 5 [2020-11-22 12:57:32,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:32,425 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-11-22 12:57:32,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:57:32,425 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-11-22 12:57:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 12:57:32,426 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:32,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:32,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:57:32,427 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-22 12:57:32,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:32,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1856744181, now seen corresponding path program 1 times [2020-11-22 12:57:32,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:32,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515256856] [2020-11-22 12:57:32,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:32,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515256856] [2020-11-22 12:57:32,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:32,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:57:32,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881937496] [2020-11-22 12:57:32,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:57:32,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:32,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:57:32,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:57:32,513 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 4 states. [2020-11-22 12:57:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:32,633 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2020-11-22 12:57:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:57:32,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-22 12:57:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:32,634 INFO L225 Difference]: With dead ends: 85 [2020-11-22 12:57:32,635 INFO L226 Difference]: Without dead ends: 85 [2020-11-22 12:57:32,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:57:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-22 12:57:32,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2020-11-22 12:57:32,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-22 12:57:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-11-22 12:57:32,647 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 12 [2020-11-22 12:57:32,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:32,647 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-11-22 12:57:32,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:57:32,648 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-11-22 12:57:32,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 12:57:32,648 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:32,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:32,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 12:57:32,649 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-22 12:57:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:32,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1856746898, now seen corresponding path program 1 times [2020-11-22 12:57:32,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:32,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725938359] [2020-11-22 12:57:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:32,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725938359] [2020-11-22 12:57:32,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:32,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:57:32,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833550124] [2020-11-22 12:57:32,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:57:32,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:32,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:57:32,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:57:32,727 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 5 states. [2020-11-22 12:57:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:32,898 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2020-11-22 12:57:32,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:57:32,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-22 12:57:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:32,900 INFO L225 Difference]: With dead ends: 89 [2020-11-22 12:57:32,900 INFO L226 Difference]: Without dead ends: 89 [2020-11-22 12:57:32,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:57:32,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-22 12:57:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-11-22 12:57:32,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-22 12:57:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-11-22 12:57:32,908 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 12 [2020-11-22 12:57:32,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:32,908 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-11-22 12:57:32,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:57:32,908 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-11-22 12:57:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 12:57:32,909 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:32,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:32,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-22 12:57:32,910 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-22 12:57:32,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:32,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1897659436, now seen corresponding path program 1 times [2020-11-22 12:57:32,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:32,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399769181] [2020-11-22 12:57:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:32,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399769181] [2020-11-22 12:57:32,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:32,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:57:32,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130451233] [2020-11-22 12:57:32,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:57:32,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:32,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:57:32,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:57:32,950 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 3 states. [2020-11-22 12:57:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:32,968 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2020-11-22 12:57:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:57:32,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-22 12:57:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:32,970 INFO L225 Difference]: With dead ends: 130 [2020-11-22 12:57:32,970 INFO L226 Difference]: Without dead ends: 130 [2020-11-22 12:57:32,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:57:32,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-22 12:57:32,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 89. [2020-11-22 12:57:32,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-22 12:57:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2020-11-22 12:57:32,977 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 12 [2020-11-22 12:57:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:32,978 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2020-11-22 12:57:32,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:57:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2020-11-22 12:57:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 12:57:32,979 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:32,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:32,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-22 12:57:32,979 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-22 12:57:32,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:32,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1888116706, now seen corresponding path program 1 times [2020-11-22 12:57:32,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:32,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266053010] [2020-11-22 12:57:32,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:33,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266053010] [2020-11-22 12:57:33,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:33,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-22 12:57:33,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242631050] [2020-11-22 12:57:33,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:57:33,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:33,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:57:33,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:57:33,083 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 5 states. [2020-11-22 12:57:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:33,254 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-11-22 12:57:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:57:33,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-22 12:57:33,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:33,256 INFO L225 Difference]: With dead ends: 108 [2020-11-22 12:57:33,256 INFO L226 Difference]: Without dead ends: 108 [2020-11-22 12:57:33,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:57:33,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-22 12:57:33,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 91. [2020-11-22 12:57:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-22 12:57:33,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2020-11-22 12:57:33,262 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 12 [2020-11-22 12:57:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:33,263 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2020-11-22 12:57:33,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:57:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2020-11-22 12:57:33,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 12:57:33,263 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:33,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:33,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-22 12:57:33,264 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-22 12:57:33,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:33,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1724579138, now seen corresponding path program 1 times [2020-11-22 12:57:33,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:33,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616698170] [2020-11-22 12:57:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:33,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616698170] [2020-11-22 12:57:33,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:33,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:57:33,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456991784] [2020-11-22 12:57:33,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:57:33,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:33,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:57:33,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:57:33,316 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 5 states. [2020-11-22 12:57:33,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:33,500 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-11-22 12:57:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:57:33,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-22 12:57:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:33,502 INFO L225 Difference]: With dead ends: 100 [2020-11-22 12:57:33,502 INFO L226 Difference]: Without dead ends: 100 [2020-11-22 12:57:33,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:57:33,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-22 12:57:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2020-11-22 12:57:33,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-22 12:57:33,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-11-22 12:57:33,507 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 13 [2020-11-22 12:57:33,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:33,507 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-11-22 12:57:33,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:57:33,508 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-11-22 12:57:33,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 12:57:33,508 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:33,508 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:33,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-22 12:57:33,509 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-22 12:57:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:33,509 INFO L82 PathProgramCache]: Analyzing trace with hash -248756619, now seen corresponding path program 1 times [2020-11-22 12:57:33,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:33,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533935128] [2020-11-22 12:57:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:33,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533935128] [2020-11-22 12:57:33,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:33,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:57:33,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248752200] [2020-11-22 12:57:33,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:57:33,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:33,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:57:33,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:57:33,580 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 5 states. [2020-11-22 12:57:33,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:33,735 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2020-11-22 12:57:33,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:57:33,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-22 12:57:33,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:33,737 INFO L225 Difference]: With dead ends: 100 [2020-11-22 12:57:33,737 INFO L226 Difference]: Without dead ends: 100 [2020-11-22 12:57:33,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:57:33,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-22 12:57:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2020-11-22 12:57:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-22 12:57:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2020-11-22 12:57:33,741 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 13 [2020-11-22 12:57:33,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:33,741 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2020-11-22 12:57:33,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:57:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2020-11-22 12:57:33,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 12:57:33,742 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:33,742 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:33,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-22 12:57:33,743 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-22 12:57:33,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:33,743 INFO L82 PathProgramCache]: Analyzing trace with hash -248756618, now seen corresponding path program 1 times [2020-11-22 12:57:33,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:33,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330282480] [2020-11-22 12:57:33,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:33,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330282480] [2020-11-22 12:57:33,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:33,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 12:57:33,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533624822] [2020-11-22 12:57:33,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:57:33,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:33,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:57:33,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:57:33,809 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 5 states. [2020-11-22 12:57:34,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:34,030 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2020-11-22 12:57:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:57:34,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-22 12:57:34,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:34,032 INFO L225 Difference]: With dead ends: 111 [2020-11-22 12:57:34,032 INFO L226 Difference]: Without dead ends: 111 [2020-11-22 12:57:34,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:57:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-22 12:57:34,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2020-11-22 12:57:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-22 12:57:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-11-22 12:57:34,052 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 13 [2020-11-22 12:57:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:34,052 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-11-22 12:57:34,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:57:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-11-22 12:57:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 12:57:34,053 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:34,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:34,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-22 12:57:34,053 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-22 12:57:34,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:34,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1919735203, now seen corresponding path program 1 times [2020-11-22 12:57:34,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:34,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930329819] [2020-11-22 12:57:34,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:34,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930329819] [2020-11-22 12:57:34,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:34,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:57:34,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042675040] [2020-11-22 12:57:34,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:57:34,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:34,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:57:34,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:57:34,181 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 5 states. [2020-11-22 12:57:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:34,313 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2020-11-22 12:57:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:57:34,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-22 12:57:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:34,315 INFO L225 Difference]: With dead ends: 93 [2020-11-22 12:57:34,315 INFO L226 Difference]: Without dead ends: 89 [2020-11-22 12:57:34,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:57:34,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-22 12:57:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-11-22 12:57:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-22 12:57:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2020-11-22 12:57:34,318 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 14 [2020-11-22 12:57:34,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:34,318 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2020-11-22 12:57:34,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:57:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2020-11-22 12:57:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 12:57:34,319 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:34,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:34,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-22 12:57:34,319 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-22 12:57:34,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:34,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1922345876, now seen corresponding path program 1 times [2020-11-22 12:57:34,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:34,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389579221] [2020-11-22 12:57:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:34,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389579221] [2020-11-22 12:57:34,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:34,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:57:34,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929956363] [2020-11-22 12:57:34,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:57:34,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:34,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:57:34,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:57:34,386 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 4 states. [2020-11-22 12:57:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:34,462 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-11-22 12:57:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:57:34,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-22 12:57:34,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:34,463 INFO L225 Difference]: With dead ends: 80 [2020-11-22 12:57:34,463 INFO L226 Difference]: Without dead ends: 80 [2020-11-22 12:57:34,463 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 [2020-11-22 12:57:34,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-22 12:57:34,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-11-22 12:57:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-22 12:57:34,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2020-11-22 12:57:34,467 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 14 [2020-11-22 12:57:34,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:34,467 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2020-11-22 12:57:34,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:57:34,467 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2020-11-22 12:57:34,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 12:57:34,468 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:34,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:34,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-22 12:57:34,468 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-22 12:57:34,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:34,469 INFO L82 PathProgramCache]: Analyzing trace with hash -536819853, now seen corresponding path program 1 times [2020-11-22 12:57:34,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:34,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362590054] [2020-11-22 12:57:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:34,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362590054] [2020-11-22 12:57:34,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:34,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 12:57:34,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578050406] [2020-11-22 12:57:34,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:57:34,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:34,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:57:34,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:57:34,554 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand 6 states. [2020-11-22 12:57:34,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:34,747 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2020-11-22 12:57:34,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:57:34,748 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-22 12:57:34,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:34,749 INFO L225 Difference]: With dead ends: 94 [2020-11-22 12:57:34,749 INFO L226 Difference]: Without dead ends: 88 [2020-11-22 12:57:34,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:57:34,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-22 12:57:34,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2020-11-22 12:57:34,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-22 12:57:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-11-22 12:57:34,752 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 15 [2020-11-22 12:57:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:34,752 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-11-22 12:57:34,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:57:34,752 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-11-22 12:57:34,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-22 12:57:34,753 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:34,753 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:34,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-22 12:57:34,753 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-22 12:57:34,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:34,754 INFO L82 PathProgramCache]: Analyzing trace with hash -2002400167, now seen corresponding path program 1 times [2020-11-22 12:57:34,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:34,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407049076] [2020-11-22 12:57:34,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:34,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407049076] [2020-11-22 12:57:34,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089433991] [2020-11-22 12:57:34,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:57:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:34,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-22 12:57:34,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:57:35,208 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 12:57:35,209 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-11-22 12:57:35,210 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 12:57:35,251 INFO L625 ElimStorePlain]: treesize reduction 14, result has 65.9 percent of original size [2020-11-22 12:57:35,251 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-22 12:57:35,251 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:27 [2020-11-22 12:57:35,350 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-11-22 12:57:35,351 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 12:57:35,381 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 12:57:35,382 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-22 12:57:35,383 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:39 [2020-11-22 12:57:35,637 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 12:57:35,638 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 67 [2020-11-22 12:57:35,641 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 3, 2, 1] term [2020-11-22 12:57:35,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-22 12:57:35,643 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 12:57:35,681 INFO L625 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2020-11-22 12:57:35,684 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-22 12:57:35,684 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:36 [2020-11-22 12:57:35,839 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-22 12:57:35,841 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-11-22 12:57:35,841 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 12:57:35,853 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 12:57:35,858 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-22 12:57:35,859 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:15 [2020-11-22 12:57:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:35,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:57:36,012 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-22 12:57:36,029 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 12:57:36,030 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-22 12:57:36,031 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:26 [2020-11-22 12:57:36,164 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 90 [2020-11-22 12:57:36,166 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-22 12:57:36,312 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-11-22 12:57:36,313 INFO L625 ElimStorePlain]: treesize reduction 36, result has 62.5 percent of original size [2020-11-22 12:57:36,315 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-11-22 12:57:36,316 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-11-22 12:57:36,317 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:57:36,327 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 3, 2, 1] term [2020-11-22 12:57:36,327 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:57:36,331 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-11-22 12:57:36,331 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:124 [2020-11-22 12:57:36,533 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-11-22 12:57:38,665 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 30 [2020-11-22 12:57:38,668 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-11-22 12:57:38,726 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 12:57:38,726 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2020-11-22 12:57:38,727 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-22 12:57:38,728 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:57:38,729 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:57:38,733 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 12:57:38,763 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 12:57:38,763 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2020-11-22 12:57:38,764 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-22 12:57:38,765 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-22 12:57:38,766 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:57:38,771 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 1] term [2020-11-22 12:57:38,771 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:57:38,773 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-22 12:57:38,822 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 12:57:38,822 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2020-11-22 12:57:38,823 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-22 12:57:38,824 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:57:38,827 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:57:38,830 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-22 12:57:38,918 INFO L625 ElimStorePlain]: treesize reduction 26, result has 65.3 percent of original size [2020-11-22 12:57:38,924 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-11-22 12:57:38,924 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:82, output treesize:17 [2020-11-22 12:57:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:39,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1942675174] [2020-11-22 12:57:39,048 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2020-11-22 12:57:39,048 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:57:39,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:57:39,060 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:57:39,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:57:39,311 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:57:39,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:57:39,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:57:39,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:57:39,929 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:57:40,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:57:40,482 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:57:40,873 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-11-22 12:57:41,413 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-11-22 12:57:41,712 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-11-22 12:57:42,163 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-11-22 12:57:42,812 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:57:42,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:57:42,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2020-11-22 12:57:42,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729647778] [2020-11-22 12:57:42,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-22 12:57:42,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:42,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-22 12:57:42,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2020-11-22 12:57:42,815 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 27 states. [2020-11-22 12:57:48,351 WARN L193 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-11-22 12:57:55,217 WARN L193 SmtUtils]: Spent 5.71 s on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-11-22 12:58:02,519 WARN L193 SmtUtils]: Spent 6.98 s on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-11-22 12:58:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:02,562 INFO L93 Difference]: Finished difference Result 175 states and 184 transitions. [2020-11-22 12:58:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-22 12:58:02,563 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 20 [2020-11-22 12:58:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:02,564 INFO L225 Difference]: With dead ends: 175 [2020-11-22 12:58:02,564 INFO L226 Difference]: Without dead ends: 175 [2020-11-22 12:58:02,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=561, Invalid=3729, Unknown=0, NotChecked=0, Total=4290 [2020-11-22 12:58:02,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-11-22 12:58:02,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 88. [2020-11-22 12:58:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-22 12:58:02,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2020-11-22 12:58:02,570 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 20 [2020-11-22 12:58:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:02,571 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2020-11-22 12:58:02,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-22 12:58:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2020-11-22 12:58:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-22 12:58:02,572 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:02,572 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:58:02,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-22 12:58:02,798 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-11-22 12:58:02,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:02,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1944937482, now seen corresponding path program 1 times [2020-11-22 12:58:02,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:02,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644773595] [2020-11-22 12:58:02,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:58:02,821 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:58:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:58:02,835 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:58:02,861 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 12:58:02,863 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 12:58:02,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-11-22 12:58:02,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:58:02 BoogieIcfgContainer [2020-11-22 12:58:02,913 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:58:02,914 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:58:02,914 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:58:02,914 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:58:02,915 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:57:31" (3/4) ... [2020-11-22 12:58:02,916 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 12:58:02,977 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ba410754-abef-46e1-b735-ac769f91f649/bin/utaipan/witness.graphml [2020-11-22 12:58:02,977 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:58:02,978 INFO L168 Benchmark]: Toolchain (without parser) took 33077.46 ms. Allocated memory was 107.0 MB in the beginning and 232.8 MB in the end (delta: 125.8 MB). Free memory was 73.7 MB in the beginning and 157.3 MB in the end (delta: -83.6 MB). Peak memory consumption was 40.8 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:02,978 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 88.1 MB. Free memory was 47.1 MB in the beginning and 47.0 MB in the end (delta: 43.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:58:02,981 INFO L168 Benchmark]: CACSL2BoogieTranslator took 641.54 ms. Allocated memory is still 107.0 MB. Free memory was 73.5 MB in the beginning and 71.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:02,981 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.92 ms. Allocated memory is still 107.0 MB. Free memory was 71.4 MB in the beginning and 69.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:02,982 INFO L168 Benchmark]: Boogie Preprocessor took 54.96 ms. Allocated memory is still 107.0 MB. Free memory was 69.4 MB in the beginning and 67.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:02,982 INFO L168 Benchmark]: RCFGBuilder took 812.68 ms. Allocated memory is still 107.0 MB. Free memory was 67.9 MB in the beginning and 83.5 MB in the end (delta: -15.6 MB). Peak memory consumption was 36.0 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:02,982 INFO L168 Benchmark]: TraceAbstraction took 31419.75 ms. Allocated memory was 107.0 MB in the beginning and 232.8 MB in the end (delta: 125.8 MB). Free memory was 82.8 MB in the beginning and 159.4 MB in the end (delta: -76.6 MB). Peak memory consumption was 49.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:02,983 INFO L168 Benchmark]: Witness Printer took 63.18 ms. Allocated memory is still 232.8 MB. Free memory was 159.4 MB in the beginning and 157.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:02,986 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 88.1 MB. Free memory was 47.1 MB in the beginning and 47.0 MB in the end (delta: 43.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 641.54 ms. Allocated memory is still 107.0 MB. Free memory was 73.5 MB in the beginning and 71.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 68.92 ms. Allocated memory is still 107.0 MB. Free memory was 71.4 MB in the beginning and 69.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.96 ms. Allocated memory is still 107.0 MB. Free memory was 69.4 MB in the beginning and 67.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 812.68 ms. Allocated memory is still 107.0 MB. Free memory was 67.9 MB in the beginning and 83.5 MB in the end (delta: -15.6 MB). Peak memory consumption was 36.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 31419.75 ms. Allocated memory was 107.0 MB in the beginning and 232.8 MB in the end (delta: 125.8 MB). Free memory was 82.8 MB in the beginning and 159.4 MB in the end (delta: -76.6 MB). Peak memory consumption was 49.1 MB. Max. memory is 16.1 GB. * Witness Printer took 63.18 ms. Allocated memory is still 232.8 MB. Free memory was 159.4 MB in the beginning and 157.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); [L534] COND FALSE !(a == 0) [L535] List t; [L536] List p = a; [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) [L539] p->h = 2 [L540] flag = 0 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] flag = 1 [L553] EXPR p->h [L553] COND TRUE p->h != 3 [L554] COND TRUE \read(flag) [L555] flag = 0 [L556] EXPR p->h [L556] COND TRUE p->h != 1 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "alternating_list-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 68 locations, 30 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 31.3s, OverallIterations: 15, TraceHistogramMax: 2, AutomataDifference: 21.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 658 SDtfs, 1538 SDslu, 1079 SDs, 0 SdLazy, 1527 SolverSat, 381 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 24.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 261 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 205 NumberOfCodeBlocks, 205 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 188 ConstructedInterpolants, 17 QuantifiedInterpolants, 28133 SizeOfPredicates, 11 NumberOfNonLiveVariables, 128 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 16 InterpolantComputations, 13 PerfectInterpolantSequences, 8/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...