./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i -s /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cbc7a588e1092d0916f2339b4d4b9e0fa8415335 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 11:10:17,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 11:10:17,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 11:10:17,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 11:10:17,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 11:10:17,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 11:10:17,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 11:10:17,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 11:10:17,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 11:10:17,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 11:10:17,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 11:10:17,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 11:10:17,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 11:10:17,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 11:10:17,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 11:10:17,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 11:10:17,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 11:10:17,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 11:10:17,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 11:10:17,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 11:10:17,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 11:10:17,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 11:10:17,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 11:10:17,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 11:10:17,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 11:10:17,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 11:10:17,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 11:10:17,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 11:10:17,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 11:10:17,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 11:10:17,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 11:10:17,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 11:10:17,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 11:10:17,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 11:10:17,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 11:10:17,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 11:10:17,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 11:10:17,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 11:10:17,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 11:10:17,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 11:10:17,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 11:10:17,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 11:10:17,717 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 11:10:17,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 11:10:17,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 11:10:17,718 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 11:10:17,718 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 11:10:17,723 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 11:10:17,723 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 11:10:17,723 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 11:10:17,723 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 11:10:17,723 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 11:10:17,723 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 11:10:17,723 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 11:10:17,724 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 11:10:17,724 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 11:10:17,724 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 11:10:17,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 11:10:17,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 11:10:17,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 11:10:17,725 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 11:10:17,725 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 11:10:17,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 11:10:17,725 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 11:10:17,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 11:10:17,725 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 11:10:17,725 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 11:10:17,726 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 11:10:17,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 11:10:17,726 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 11:10:17,726 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 11:10:17,726 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 11:10:17,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 11:10:17,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 11:10:17,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:10:17,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 11:10:17,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 11:10:17,727 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 11:10:17,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 11:10:17,727 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 11:10:17,727 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 11:10:17,727 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_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cbc7a588e1092d0916f2339b4d4b9e0fa8415335 [2020-12-09 11:10:17,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 11:10:17,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 11:10:17,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 11:10:17,908 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 11:10:17,908 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 11:10:17,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2020-12-09 11:10:17,948 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/data/d23c9fa1d/57b967237c834e358b5b0e808fbe8093/FLAG791ae0c04 [2020-12-09 11:10:18,356 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 11:10:18,357 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2020-12-09 11:10:18,366 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/data/d23c9fa1d/57b967237c834e358b5b0e808fbe8093/FLAG791ae0c04 [2020-12-09 11:10:18,727 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/data/d23c9fa1d/57b967237c834e358b5b0e808fbe8093 [2020-12-09 11:10:18,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 11:10:18,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 11:10:18,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 11:10:18,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 11:10:18,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 11:10:18,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:10:18" (1/1) ... [2020-12-09 11:10:18,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bda586e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:10:18, skipping insertion in model container [2020-12-09 11:10:18,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:10:18" (1/1) ... [2020-12-09 11:10:18,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 11:10:18,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 11:10:18,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:10:18,937 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 11:10:18,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:10:19,004 INFO L208 MainTranslator]: Completed translation [2020-12-09 11:10:19,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:10:19 WrapperNode [2020-12-09 11:10:19,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 11:10:19,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 11:10:19,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 11:10:19,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 11:10:19,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:10:19" (1/1) ... [2020-12-09 11:10:19,022 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:10:19" (1/1) ... [2020-12-09 11:10:19,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 11:10:19,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 11:10:19,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 11:10:19,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 11:10:19,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:10:19" (1/1) ... [2020-12-09 11:10:19,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:10:19" (1/1) ... [2020-12-09 11:10:19,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:10:19" (1/1) ... [2020-12-09 11:10:19,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:10:19" (1/1) ... [2020-12-09 11:10:19,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:10:19" (1/1) ... [2020-12-09 11:10:19,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:10:19" (1/1) ... [2020-12-09 11:10:19,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:10:19" (1/1) ... [2020-12-09 11:10:19,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 11:10:19,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 11:10:19,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 11:10:19,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 11:10:19,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:10:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:10:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 11:10:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 11:10:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 11:10:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 11:10:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 11:10:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 11:10:19,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 11:10:19,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 11:10:19,433 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 11:10:19,433 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-09 11:10:19,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:10:19 BoogieIcfgContainer [2020-12-09 11:10:19,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 11:10:19,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 11:10:19,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 11:10:19,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 11:10:19,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:10:18" (1/3) ... [2020-12-09 11:10:19,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59863f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:10:19, skipping insertion in model container [2020-12-09 11:10:19,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:10:19" (2/3) ... [2020-12-09 11:10:19,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59863f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:10:19, skipping insertion in model container [2020-12-09 11:10:19,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:10:19" (3/3) ... [2020-12-09 11:10:19,442 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-3.i [2020-12-09 11:10:19,452 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 11:10:19,454 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2020-12-09 11:10:19,461 INFO L253 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2020-12-09 11:10:19,477 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 11:10:19,477 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 11:10:19,477 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 11:10:19,477 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 11:10:19,477 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 11:10:19,478 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 11:10:19,478 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 11:10:19,478 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 11:10:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-12-09 11:10:19,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 11:10:19,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:10:19,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 11:10:19,495 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:10:19,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:10:19,499 INFO L82 PathProgramCache]: Analyzing trace with hash 3678261, now seen corresponding path program 1 times [2020-12-09 11:10:19,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:10:19,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119559112] [2020-12-09 11:10:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:10:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:19,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119559112] [2020-12-09 11:10:19,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:10:19,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:10:19,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440738040] [2020-12-09 11:10:19,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 11:10:19,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:10:19,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 11:10:19,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 11:10:19,631 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2020-12-09 11:10:19,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:10:19,644 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-12-09 11:10:19,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 11:10:19,645 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 11:10:19,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:10:19,653 INFO L225 Difference]: With dead ends: 47 [2020-12-09 11:10:19,653 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 11:10:19,654 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 [2020-12-09 11:10:19,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 11:10:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-09 11:10:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-09 11:10:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-12-09 11:10:19,684 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 4 [2020-12-09 11:10:19,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:10:19,685 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-12-09 11:10:19,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 11:10:19,685 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-12-09 11:10:19,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 11:10:19,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:10:19,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 11:10:19,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 11:10:19,686 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:10:19,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:10:19,687 INFO L82 PathProgramCache]: Analyzing trace with hash 113811744, now seen corresponding path program 1 times [2020-12-09 11:10:19,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:10:19,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168897462] [2020-12-09 11:10:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:10:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:19,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168897462] [2020-12-09 11:10:19,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:10:19,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:10:19,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099947243] [2020-12-09 11:10:19,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 11:10:19,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:10:19,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 11:10:19,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:10:19,744 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 3 states. [2020-12-09 11:10:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:10:19,779 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-12-09 11:10:19,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 11:10:19,779 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 11:10:19,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:10:19,780 INFO L225 Difference]: With dead ends: 45 [2020-12-09 11:10:19,780 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 11:10:19,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:10:19,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 11:10:19,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-09 11:10:19,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-09 11:10:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-12-09 11:10:19,785 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 5 [2020-12-09 11:10:19,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:10:19,785 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-12-09 11:10:19,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 11:10:19,785 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-12-09 11:10:19,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 11:10:19,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:10:19,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 11:10:19,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 11:10:19,786 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:10:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:10:19,786 INFO L82 PathProgramCache]: Analyzing trace with hash 113811745, now seen corresponding path program 1 times [2020-12-09 11:10:19,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:10:19,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960174636] [2020-12-09 11:10:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:10:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:19,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960174636] [2020-12-09 11:10:19,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:10:19,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:10:19,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403873004] [2020-12-09 11:10:19,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:10:19,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:10:19,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:10:19,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:10:19,828 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 4 states. [2020-12-09 11:10:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:10:19,874 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-12-09 11:10:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:10:19,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 11:10:19,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:10:19,875 INFO L225 Difference]: With dead ends: 88 [2020-12-09 11:10:19,875 INFO L226 Difference]: Without dead ends: 88 [2020-12-09 11:10:19,876 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 [2020-12-09 11:10:19,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-09 11:10:19,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 49. [2020-12-09 11:10:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 11:10:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-12-09 11:10:19,881 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 5 [2020-12-09 11:10:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:10:19,881 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-12-09 11:10:19,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:10:19,881 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-12-09 11:10:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 11:10:19,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:10:19,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:10:19,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 11:10:19,882 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:10:19,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:10:19,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1998977518, now seen corresponding path program 1 times [2020-12-09 11:10:19,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:10:19,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398661687] [2020-12-09 11:10:19,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:10:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:19,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398661687] [2020-12-09 11:10:19,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:10:19,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 11:10:19,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573920827] [2020-12-09 11:10:19,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:10:19,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:10:19,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:10:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:10:19,925 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 4 states. [2020-12-09 11:10:19,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:10:19,956 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-12-09 11:10:19,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 11:10:19,956 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 11:10:19,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:10:19,956 INFO L225 Difference]: With dead ends: 46 [2020-12-09 11:10:19,957 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 11:10:19,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:10:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 11:10:19,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-09 11:10:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-09 11:10:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-12-09 11:10:19,960 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 7 [2020-12-09 11:10:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:10:19,961 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-12-09 11:10:19,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:10:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-12-09 11:10:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 11:10:19,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:10:19,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:10:19,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 11:10:19,962 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:10:19,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:10:19,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1998977519, now seen corresponding path program 1 times [2020-12-09 11:10:19,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:10:19,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134464923] [2020-12-09 11:10:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:10:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:20,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134464923] [2020-12-09 11:10:20,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:10:20,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:10:20,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898022016] [2020-12-09 11:10:20,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 11:10:20,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:10:20,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 11:10:20,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:10:20,032 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-12-09 11:10:20,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:10:20,104 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-12-09 11:10:20,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 11:10:20,104 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-09 11:10:20,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:10:20,105 INFO L225 Difference]: With dead ends: 79 [2020-12-09 11:10:20,105 INFO L226 Difference]: Without dead ends: 79 [2020-12-09 11:10:20,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:10:20,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-09 11:10:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2020-12-09 11:10:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-09 11:10:20,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-12-09 11:10:20,110 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2020-12-09 11:10:20,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:10:20,110 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-12-09 11:10:20,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 11:10:20,110 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-12-09 11:10:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 11:10:20,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:10:20,111 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-12-09 11:10:20,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 11:10:20,111 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:10:20,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:10:20,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2000475334, now seen corresponding path program 1 times [2020-12-09 11:10:20,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:10:20,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291463590] [2020-12-09 11:10:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:10:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:20,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291463590] [2020-12-09 11:10:20,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239682281] [2020-12-09 11:10:20,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:10:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:20,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 11:10:20,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:10:20,269 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-09 11:10:20,269 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-09 11:10:20,271 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:10:20,280 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:10:20,288 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 11:10:20,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-09 11:10:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:20,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:10:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:20,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 11:10:20,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 7 [2020-12-09 11:10:20,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668841893] [2020-12-09 11:10:20,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 11:10:20,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:10:20,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 11:10:20,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-09 11:10:20,358 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 7 states. [2020-12-09 11:10:20,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:10:20,429 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-12-09 11:10:20,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 11:10:20,430 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2020-12-09 11:10:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:10:20,431 INFO L225 Difference]: With dead ends: 78 [2020-12-09 11:10:20,431 INFO L226 Difference]: Without dead ends: 78 [2020-12-09 11:10:20,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-09 11:10:20,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-09 11:10:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-12-09 11:10:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-09 11:10:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-12-09 11:10:20,435 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 7 [2020-12-09 11:10:20,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:10:20,435 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-12-09 11:10:20,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 11:10:20,435 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-12-09 11:10:20,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 11:10:20,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:10:20,436 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:10:20,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 11:10:20,637 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:10:20,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:10:20,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1167076850, now seen corresponding path program 1 times [2020-12-09 11:10:20,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:10:20,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805502426] [2020-12-09 11:10:20,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:10:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:20,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805502426] [2020-12-09 11:10:20,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200029975] [2020-12-09 11:10:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:10:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:20,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 11:10:20,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:10:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:20,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:10:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:20,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 11:10:20,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2020-12-09 11:10:20,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064415104] [2020-12-09 11:10:20,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 11:10:20,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:10:20,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 11:10:20,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-09 11:10:20,807 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 7 states. [2020-12-09 11:10:20,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:10:20,846 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-12-09 11:10:20,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 11:10:20,847 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-09 11:10:20,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:10:20,847 INFO L225 Difference]: With dead ends: 76 [2020-12-09 11:10:20,847 INFO L226 Difference]: Without dead ends: 76 [2020-12-09 11:10:20,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-09 11:10:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-09 11:10:20,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2020-12-09 11:10:20,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-09 11:10:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-12-09 11:10:20,851 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 9 [2020-12-09 11:10:20,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:10:20,851 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-12-09 11:10:20,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 11:10:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-12-09 11:10:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 11:10:20,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:10:20,852 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:10:21,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:10:21,054 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:10:21,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:10:21,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1688479660, now seen corresponding path program 1 times [2020-12-09 11:10:21,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:10:21,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976676246] [2020-12-09 11:10:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:10:21,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:21,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976676246] [2020-12-09 11:10:21,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320828429] [2020-12-09 11:10:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:10:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:21,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 11:10:21,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:10:21,305 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-12-09 11:10:21,306 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 15 [2020-12-09 11:10:21,307 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:10:21,314 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:10:21,319 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 11:10:21,319 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2020-12-09 11:10:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:21,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:10:21,397 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:10:21,398 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:10:21,398 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:10:21,399 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:5 [2020-12-09 11:10:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:21,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 11:10:21,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 11 [2020-12-09 11:10:21,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089787934] [2020-12-09 11:10:21,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 11:10:21,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:10:21,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 11:10:21,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-12-09 11:10:21,417 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 9 states. [2020-12-09 11:10:21,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:10:21,632 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2020-12-09 11:10:21,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 11:10:21,633 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-09 11:10:21,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:10:21,634 INFO L225 Difference]: With dead ends: 113 [2020-12-09 11:10:21,634 INFO L226 Difference]: Without dead ends: 113 [2020-12-09 11:10:21,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-12-09 11:10:21,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-09 11:10:21,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 52. [2020-12-09 11:10:21,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 11:10:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-12-09 11:10:21,638 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 9 [2020-12-09 11:10:21,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:10:21,638 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-12-09 11:10:21,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 11:10:21,638 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-12-09 11:10:21,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 11:10:21,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:10:21,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:10:21,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:10:21,840 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:10:21,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:10:21,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1819714314, now seen corresponding path program 1 times [2020-12-09 11:10:21,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:10:21,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658240699] [2020-12-09 11:10:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:10:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 11:10:21,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658240699] [2020-12-09 11:10:21,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:10:21,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 11:10:21,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968960283] [2020-12-09 11:10:21,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:10:21,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:10:21,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:10:21,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:10:21,924 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 4 states. [2020-12-09 11:10:21,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:10:21,969 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-12-09 11:10:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:10:21,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-09 11:10:21,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:10:21,970 INFO L225 Difference]: With dead ends: 50 [2020-12-09 11:10:21,970 INFO L226 Difference]: Without dead ends: 50 [2020-12-09 11:10:21,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:10:21,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-09 11:10:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-09 11:10:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-09 11:10:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-12-09 11:10:21,973 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 10 [2020-12-09 11:10:21,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:10:21,973 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-12-09 11:10:21,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:10:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-12-09 11:10:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 11:10:21,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:10:21,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:10:21,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 11:10:21,974 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:10:21,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:10:21,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1819714315, now seen corresponding path program 1 times [2020-12-09 11:10:21,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:10:21,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167078552] [2020-12-09 11:10:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:10:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 11:10:22,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167078552] [2020-12-09 11:10:22,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:10:22,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:10:22,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807376035] [2020-12-09 11:10:22,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 11:10:22,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:10:22,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 11:10:22,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:10:22,020 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 6 states. [2020-12-09 11:10:22,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:10:22,062 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-12-09 11:10:22,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 11:10:22,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-09 11:10:22,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:10:22,063 INFO L225 Difference]: With dead ends: 53 [2020-12-09 11:10:22,064 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 11:10:22,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:10:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 11:10:22,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2020-12-09 11:10:22,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-09 11:10:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-12-09 11:10:22,067 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 10 [2020-12-09 11:10:22,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:10:22,067 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-12-09 11:10:22,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 11:10:22,067 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-12-09 11:10:22,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 11:10:22,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:10:22,068 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:10:22,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 11:10:22,069 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:10:22,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:10:22,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1161422898, now seen corresponding path program 1 times [2020-12-09 11:10:22,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:10:22,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723040947] [2020-12-09 11:10:22,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:10:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:22,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723040947] [2020-12-09 11:10:22,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029492016] [2020-12-09 11:10:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:10:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:22,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 11:10:22,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:10:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:22,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:10:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:22,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2035194966] [2020-12-09 11:10:22,238 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 11:10:22,238 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 11:10:22,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 11:10:22,248 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 11:10:22,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 11:10:22,727 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 11:10:23,288 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:10:23,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 11:10:23,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-12-09 11:10:23,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721088710] [2020-12-09 11:10:23,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 11:10:23,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:10:23,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 11:10:23,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-09 11:10:23,290 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 10 states. [2020-12-09 11:10:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:10:23,386 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-12-09 11:10:23,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 11:10:23,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2020-12-09 11:10:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:10:23,387 INFO L225 Difference]: With dead ends: 73 [2020-12-09 11:10:23,387 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 11:10:23,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-12-09 11:10:23,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 11:10:23,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2020-12-09 11:10:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-09 11:10:23,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-12-09 11:10:23,390 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 12 [2020-12-09 11:10:23,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:10:23,390 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-12-09 11:10:23,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 11:10:23,390 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-12-09 11:10:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 11:10:23,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:10:23,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:10:23,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:10:23,593 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:10:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:10:23,594 INFO L82 PathProgramCache]: Analyzing trace with hash 31961025, now seen corresponding path program 1 times [2020-12-09 11:10:23,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:10:23,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596445158] [2020-12-09 11:10:23,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:10:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 11:10:23,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596445158] [2020-12-09 11:10:23,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:10:23,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:10:23,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496370999] [2020-12-09 11:10:23,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 11:10:23,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:10:23,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 11:10:23,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:10:23,677 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 3 states. [2020-12-09 11:10:23,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:10:23,730 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-12-09 11:10:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 11:10:23,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-09 11:10:23,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:10:23,733 INFO L225 Difference]: With dead ends: 38 [2020-12-09 11:10:23,734 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 11:10:23,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:10:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 11:10:23,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-09 11:10:23,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-09 11:10:23,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-12-09 11:10:23,739 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 13 [2020-12-09 11:10:23,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:10:23,740 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-12-09 11:10:23,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 11:10:23,741 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-12-09 11:10:23,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 11:10:23,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:10:23,742 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 11:10:23,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-12-09 11:10:23,743 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:10:23,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:10:23,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1642303770, now seen corresponding path program 1 times [2020-12-09 11:10:23,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:10:23,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455611106] [2020-12-09 11:10:23,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:10:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:23,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455611106] [2020-12-09 11:10:23,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684827553] [2020-12-09 11:10:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:10:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:23,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 11:10:23,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:10:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:23,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:10:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:10:23,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [899185875] [2020-12-09 11:10:23,878 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 11:10:23,878 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 11:10:23,878 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 11:10:23,879 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 11:10:23,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 11:10:24,198 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 11:10:24,658 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:10:24,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 11:10:24,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2020-12-09 11:10:24,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528602927] [2020-12-09 11:10:24,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 11:10:24,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:10:24,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 11:10:24,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-12-09 11:10:24,659 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2020-12-09 11:10:24,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:10:24,748 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-12-09 11:10:24,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 11:10:24,749 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2020-12-09 11:10:24,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:10:24,749 INFO L225 Difference]: With dead ends: 75 [2020-12-09 11:10:24,749 INFO L226 Difference]: Without dead ends: 75 [2020-12-09 11:10:24,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-12-09 11:10:24,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-09 11:10:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2020-12-09 11:10:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-09 11:10:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-12-09 11:10:24,751 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 13 [2020-12-09 11:10:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:10:24,752 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-12-09 11:10:24,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 11:10:24,752 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-12-09 11:10:24,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 11:10:24,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:10:24,752 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:10:24,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-09 11:10:24,954 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:10:24,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:10:24,955 INFO L82 PathProgramCache]: Analyzing trace with hash -628121969, now seen corresponding path program 2 times [2020-12-09 11:10:24,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:10:24,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730526569] [2020-12-09 11:10:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:10:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:10:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 11:10:25,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730526569] [2020-12-09 11:10:25,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512128830] [2020-12-09 11:10:25,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:10:25,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 11:10:25,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 11:10:25,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 11:10:25,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:10:25,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 11:10:25,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:10:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 11:10:25,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 11:10:25,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 15 [2020-12-09 11:10:25,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456804809] [2020-12-09 11:10:25,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 11:10:25,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:10:25,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 11:10:25,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-12-09 11:10:25,272 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 10 states. [2020-12-09 11:10:25,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:10:25,351 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-12-09 11:10:25,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 11:10:25,351 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-09 11:10:25,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:10:25,352 INFO L225 Difference]: With dead ends: 49 [2020-12-09 11:10:25,352 INFO L226 Difference]: Without dead ends: 49 [2020-12-09 11:10:25,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-12-09 11:10:25,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-09 11:10:25,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-09 11:10:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 11:10:25,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-12-09 11:10:25,355 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 14 [2020-12-09 11:10:25,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:10:25,355 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-12-09 11:10:25,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 11:10:25,355 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-12-09 11:10:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 11:10:25,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:10:25,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:10:25,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:10:25,558 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 11:10:25,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:10:25,559 INFO L82 PathProgramCache]: Analyzing trace with hash 649777443, now seen corresponding path program 1 times [2020-12-09 11:10:25,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:10:25,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787477778] [2020-12-09 11:10:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:10:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:10:25,598 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:10:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:10:25,610 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:10:25,624 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 11:10:25,624 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 11:10:25,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-12-09 11:10:25,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:10:25 BoogieIcfgContainer [2020-12-09 11:10:25,645 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 11:10:25,645 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 11:10:25,645 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 11:10:25,645 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 11:10:25,646 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:10:19" (3/4) ... [2020-12-09 11:10:25,647 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 11:10:25,672 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e42640e8-3e85-4c88-8ebf-f7f19f7e0f97/bin/utaipan/witness.graphml [2020-12-09 11:10:25,672 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 11:10:25,673 INFO L168 Benchmark]: Toolchain (without parser) took 6942.82 ms. Allocated memory was 123.7 MB in the beginning and 180.4 MB in the end (delta: 56.6 MB). Free memory was 101.8 MB in the beginning and 64.5 MB in the end (delta: 37.3 MB). Peak memory consumption was 94.9 MB. Max. memory is 16.1 GB. [2020-12-09 11:10:25,673 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 81.8 MB. Free memory was 56.9 MB in the beginning and 56.9 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:10:25,673 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.71 ms. Allocated memory is still 123.7 MB. Free memory was 101.8 MB in the beginning and 80.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 11:10:25,674 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.67 ms. Allocated memory is still 123.7 MB. Free memory was 80.4 MB in the beginning and 78.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:10:25,674 INFO L168 Benchmark]: Boogie Preprocessor took 26.10 ms. Allocated memory is still 123.7 MB. Free memory was 78.8 MB in the beginning and 77.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:10:25,674 INFO L168 Benchmark]: RCFGBuilder took 367.75 ms. Allocated memory is still 123.7 MB. Free memory was 77.2 MB in the beginning and 52.0 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-12-09 11:10:25,674 INFO L168 Benchmark]: TraceAbstraction took 6207.60 ms. Allocated memory was 123.7 MB in the beginning and 180.4 MB in the end (delta: 56.6 MB). Free memory was 51.5 MB in the beginning and 67.7 MB in the end (delta: -16.2 MB). Peak memory consumption was 42.5 MB. Max. memory is 16.1 GB. [2020-12-09 11:10:25,675 INFO L168 Benchmark]: Witness Printer took 27.18 ms. Allocated memory is still 180.4 MB. Free memory was 67.7 MB in the beginning and 64.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:10:25,676 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 81.8 MB. Free memory was 56.9 MB in the beginning and 56.9 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 273.71 ms. Allocated memory is still 123.7 MB. Free memory was 101.8 MB in the beginning and 80.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.67 ms. Allocated memory is still 123.7 MB. Free memory was 80.4 MB in the beginning and 78.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.10 ms. Allocated memory is still 123.7 MB. Free memory was 78.8 MB in the beginning and 77.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 367.75 ms. Allocated memory is still 123.7 MB. Free memory was 77.2 MB in the beginning and 52.0 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6207.60 ms. Allocated memory was 123.7 MB in the beginning and 180.4 MB in the end (delta: 56.6 MB). Free memory was 51.5 MB in the beginning and 67.7 MB in the end (delta: -16.2 MB). Peak memory consumption was 42.5 MB. Max. memory is 16.1 GB. * Witness Printer took 27.18 ms. Allocated memory is still 180.4 MB. Free memory was 67.7 MB in the beginning and 64.5 MB in the end (delta: 3.1 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: 547]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L523] int *a, *b; [L524] int n; [L536] n = 1 VAL [a={0:0}, b={0:0}, n=1] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] EXPR b++ VAL [a={1:0}, b={-2:4}, n=1] [L542] *b++ = 0 [L528] int i; [L529] i = 0 VAL [a={1:0}, b={-2:4}, n=1] [L529] COND TRUE i < n VAL [a={1:0}, b={-2:4}, n=1] [L530] a[i] = -1 [L529] i++ VAL [a={1:0}, b={-2:4}, n=1] [L529] COND FALSE !(i < n) [L531] i = 0 VAL [a={1:0}, b={-2:4}, n=1] [L531] COND FALSE !(i < n - 1) VAL [a={1:0}, b={-2:4}, n=1] [L544] b[-1] VAL [a={1:0}, b={-2:4}, n=1] [L544] COND FALSE !(b[-1]) [L547] free(a) VAL [a={1:0}, b={-2:4}, n=1] [L547] free(a) VAL [a={1:0}, b={-2:4}, n=1] [L547] free(a) [L547] free(b) VAL [a={1:0}, b={-2:4}, n=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 21 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.1s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 472 SDtfs, 962 SDslu, 796 SDs, 0 SdLazy, 735 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 242 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 204 NumberOfCodeBlocks, 198 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 227 ConstructedInterpolants, 0 QuantifiedInterpolants, 15071 SizeOfPredicates, 23 NumberOfNonLiveVariables, 498 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 26 InterpolantComputations, 16 PerfectInterpolantSequences, 51/72 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...