./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/stateful_check.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/stateful_check.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a342581b7572d5ebcb4a58d0a914c795d7fcf5cd ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 15:36:02,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 15:36:02,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 15:36:02,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 15:36:02,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 15:36:02,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 15:36:02,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 15:36:02,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 15:36:02,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 15:36:02,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 15:36:02,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 15:36:02,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 15:36:02,832 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 15:36:02,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 15:36:02,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 15:36:02,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 15:36:02,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 15:36:02,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 15:36:02,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 15:36:02,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 15:36:02,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 15:36:02,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 15:36:02,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 15:36:02,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 15:36:02,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 15:36:02,848 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 15:36:02,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 15:36:02,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 15:36:02,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 15:36:02,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 15:36:02,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 15:36:02,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 15:36:02,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 15:36:02,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 15:36:02,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 15:36:02,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 15:36:02,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 15:36:02,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 15:36:02,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 15:36:02,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 15:36:02,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 15:36:02,858 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 15:36:02,881 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 15:36:02,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 15:36:02,882 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 15:36:02,882 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 15:36:02,882 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 15:36:02,882 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 15:36:02,882 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 15:36:02,883 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 15:36:02,883 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 15:36:02,883 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 15:36:02,883 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 15:36:02,883 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 15:36:02,883 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 15:36:02,884 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 15:36:02,884 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 15:36:02,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 15:36:02,885 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 15:36:02,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 15:36:02,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 15:36:02,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 15:36:02,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 15:36:02,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 15:36:02,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 15:36:02,886 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 15:36:02,886 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 15:36:02,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 15:36:02,886 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 15:36:02,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 15:36:02,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 15:36:02,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 15:36:02,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 15:36:02,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 15:36:02,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 15:36:02,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 15:36:02,888 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 15:36:02,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 15:36:02,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 15:36:02,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 15:36:02,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 15:36:02,889 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_5e860fd6-4e1c-407f-9230-c5a3e0723912/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a342581b7572d5ebcb4a58d0a914c795d7fcf5cd [2020-12-09 15:36:03,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 15:36:03,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 15:36:03,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 15:36:03,101 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 15:36:03,101 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 15:36:03,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/bin/utaipan/../../sv-benchmarks/c/ldv-regression/stateful_check.c [2020-12-09 15:36:03,143 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/bin/utaipan/data/6c73b1faa/21e7eab6989146919993cdb8a3b00a3a/FLAG6100ac20a [2020-12-09 15:36:03,526 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 15:36:03,527 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/sv-benchmarks/c/ldv-regression/stateful_check.c [2020-12-09 15:36:03,531 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/bin/utaipan/data/6c73b1faa/21e7eab6989146919993cdb8a3b00a3a/FLAG6100ac20a [2020-12-09 15:36:03,541 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/bin/utaipan/data/6c73b1faa/21e7eab6989146919993cdb8a3b00a3a [2020-12-09 15:36:03,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 15:36:03,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 15:36:03,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 15:36:03,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 15:36:03,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 15:36:03,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:36:03" (1/1) ... [2020-12-09 15:36:03,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f27f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:36:03, skipping insertion in model container [2020-12-09 15:36:03,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 03:36:03" (1/1) ... [2020-12-09 15:36:03,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 15:36:03,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 15:36:03,663 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/sv-benchmarks/c/ldv-regression/stateful_check.c[298,311] [2020-12-09 15:36:03,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:36:03,698 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 15:36:03,706 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/sv-benchmarks/c/ldv-regression/stateful_check.c[298,311] [2020-12-09 15:36:03,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 15:36:03,723 INFO L208 MainTranslator]: Completed translation [2020-12-09 15:36:03,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:36:03 WrapperNode [2020-12-09 15:36:03,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 15:36:03,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 15:36:03,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 15:36:03,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 15:36:03,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:36:03" (1/1) ... [2020-12-09 15:36:03,738 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:36:03" (1/1) ... [2020-12-09 15:36:03,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 15:36:03,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 15:36:03,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 15:36:03,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 15:36:03,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:36:03" (1/1) ... [2020-12-09 15:36:03,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:36:03" (1/1) ... [2020-12-09 15:36:03,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:36:03" (1/1) ... [2020-12-09 15:36:03,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:36:03" (1/1) ... [2020-12-09 15:36:03,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:36:03" (1/1) ... [2020-12-09 15:36:03,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:36:03" (1/1) ... [2020-12-09 15:36:03,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:36:03" (1/1) ... [2020-12-09 15:36:03,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 15:36:03,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 15:36:03,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 15:36:03,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 15:36:03,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:36:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/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 15:36:03,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 15:36:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 15:36:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 15:36:03,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 15:36:04,191 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 15:36:04,191 INFO L299 CfgBuilder]: Removed 35 assume(true) statements. [2020-12-09 15:36:04,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:36:04 BoogieIcfgContainer [2020-12-09 15:36:04,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 15:36:04,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 15:36:04,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 15:36:04,199 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 15:36:04,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 03:36:03" (1/3) ... [2020-12-09 15:36:04,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f232d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:36:04, skipping insertion in model container [2020-12-09 15:36:04,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 03:36:03" (2/3) ... [2020-12-09 15:36:04,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f232d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 03:36:04, skipping insertion in model container [2020-12-09 15:36:04,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:36:04" (3/3) ... [2020-12-09 15:36:04,203 INFO L111 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2020-12-09 15:36:04,214 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 15:36:04,216 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-09 15:36:04,226 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-09 15:36:04,243 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 15:36:04,243 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 15:36:04,243 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 15:36:04,243 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 15:36:04,243 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 15:36:04,243 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 15:36:04,244 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 15:36:04,244 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 15:36:04,253 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-09 15:36:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 15:36:04,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:36:04,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 15:36:04,257 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:36:04,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:36:04,262 INFO L82 PathProgramCache]: Analyzing trace with hash 5735950, now seen corresponding path program 1 times [2020-12-09 15:36:04,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:36:04,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401169440] [2020-12-09 15:36:04,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:36:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:36:04,371 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 15:36:04,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401169440] [2020-12-09 15:36:04,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:36:04,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 15:36:04,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3102774] [2020-12-09 15:36:04,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 15:36:04,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:36:04,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 15:36:04,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 15:36:04,387 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-09 15:36:04,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:36:04,421 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2020-12-09 15:36:04,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 15:36:04,422 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 15:36:04,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:36:04,431 INFO L225 Difference]: With dead ends: 63 [2020-12-09 15:36:04,431 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 15:36:04,434 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 15:36:04,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 15:36:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-09 15:36:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-09 15:36:04,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-09 15:36:04,464 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 4 [2020-12-09 15:36:04,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:36:04,464 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-09 15:36:04,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 15:36:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-09 15:36:04,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 15:36:04,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:36:04,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 15:36:04,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 15:36:04,466 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:36:04,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:36:04,467 INFO L82 PathProgramCache]: Analyzing trace with hash 173906145, now seen corresponding path program 1 times [2020-12-09 15:36:04,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:36:04,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509317938] [2020-12-09 15:36:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:36:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:36:04,503 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 15:36:04,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509317938] [2020-12-09 15:36:04,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:36:04,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 15:36:04,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796342047] [2020-12-09 15:36:04,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:36:04,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:36:04,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:36:04,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:36:04,506 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2020-12-09 15:36:04,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:36:04,535 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-12-09 15:36:04,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:36:04,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 15:36:04,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:36:04,537 INFO L225 Difference]: With dead ends: 49 [2020-12-09 15:36:04,537 INFO L226 Difference]: Without dead ends: 42 [2020-12-09 15:36:04,538 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 15:36:04,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-09 15:36:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-09 15:36:04,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-09 15:36:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2020-12-09 15:36:04,546 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 5 [2020-12-09 15:36:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:36:04,547 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2020-12-09 15:36:04,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:36:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2020-12-09 15:36:04,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 15:36:04,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:36:04,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:36:04,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 15:36:04,548 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:36:04,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:36:04,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1072259714, now seen corresponding path program 1 times [2020-12-09 15:36:04,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:36:04,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195959003] [2020-12-09 15:36:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:36:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:36:04,590 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 15:36:04,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195959003] [2020-12-09 15:36:04,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 15:36:04,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 15:36:04,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750367373] [2020-12-09 15:36:04,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:36:04,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:36:04,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:36:04,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 15:36:04,592 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand 3 states. [2020-12-09 15:36:04,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:36:04,613 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2020-12-09 15:36:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:36:04,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-09 15:36:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:36:04,615 INFO L225 Difference]: With dead ends: 102 [2020-12-09 15:36:04,615 INFO L226 Difference]: Without dead ends: 61 [2020-12-09 15:36:04,615 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 15:36:04,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-09 15:36:04,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-12-09 15:36:04,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-09 15:36:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2020-12-09 15:36:04,622 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 13 [2020-12-09 15:36:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:36:04,623 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2020-12-09 15:36:04,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:36:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2020-12-09 15:36:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 15:36:04,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:36:04,623 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:36:04,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 15:36:04,624 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:36:04,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:36:04,624 INFO L82 PathProgramCache]: Analyzing trace with hash -2103785729, now seen corresponding path program 1 times [2020-12-09 15:36:04,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:36:04,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534822088] [2020-12-09 15:36:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:36:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:36:04,671 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 15:36:04,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534822088] [2020-12-09 15:36:04,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104009314] [2020-12-09 15:36:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/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 15:36:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:36:04,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 15:36:04,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:36:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 15:36:04,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:36:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 15:36:04,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 15:36:04,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [3] total 5 [2020-12-09 15:36:04,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722413063] [2020-12-09 15:36:04,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:36:04,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:36:04,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:36:04,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 15:36:04,748 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand 3 states. [2020-12-09 15:36:04,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:36:04,762 INFO L93 Difference]: Finished difference Result 85 states and 117 transitions. [2020-12-09 15:36:04,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:36:04,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-09 15:36:04,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:36:04,763 INFO L225 Difference]: With dead ends: 85 [2020-12-09 15:36:04,763 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 15:36:04,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 15:36:04,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 15:36:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-09 15:36:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 15:36:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2020-12-09 15:36:04,768 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 17 [2020-12-09 15:36:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:36:04,768 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2020-12-09 15:36:04,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:36:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2020-12-09 15:36:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 15:36:04,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:36:04,769 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:36:04,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:36:04,970 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:36:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:36:04,970 INFO L82 PathProgramCache]: Analyzing trace with hash -2078019494, now seen corresponding path program 1 times [2020-12-09 15:36:04,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:36:04,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51455630] [2020-12-09 15:36:04,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:36:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:36:04,999 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 15:36:04,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51455630] [2020-12-09 15:36:04,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473035142] [2020-12-09 15:36:05,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/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 15:36:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:36:05,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 15:36:05,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:36:05,092 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 15:36:05,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:36:05,134 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 15:36:05,134 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 15:36:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 15:36:05,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 15:36:05,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 5 [2020-12-09 15:36:05,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012823234] [2020-12-09 15:36:05,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 15:36:05,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:36:05,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 15:36:05,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 15:36:05,142 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 3 states. [2020-12-09 15:36:05,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:36:05,163 INFO L93 Difference]: Finished difference Result 71 states and 98 transitions. [2020-12-09 15:36:05,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 15:36:05,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-09 15:36:05,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:36:05,165 INFO L225 Difference]: With dead ends: 71 [2020-12-09 15:36:05,165 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 15:36:05,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 15:36:05,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 15:36:05,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-09 15:36:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 15:36:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2020-12-09 15:36:05,170 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 17 [2020-12-09 15:36:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:36:05,170 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2020-12-09 15:36:05,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 15:36:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2020-12-09 15:36:05,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 15:36:05,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:36:05,172 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:36:05,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:36:05,372 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:36:05,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:36:05,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2101935190, now seen corresponding path program 1 times [2020-12-09 15:36:05,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:36:05,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699430567] [2020-12-09 15:36:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:36:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:36:05,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 15:36:05,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699430567] [2020-12-09 15:36:05,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317029543] [2020-12-09 15:36:05,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/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 15:36:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:36:05,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 15:36:05,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:36:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 15:36:05,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:36:05,516 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 15:36:05,516 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 15:36:05,531 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 15:36:05,531 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 15:36:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 15:36:05,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691445421] [2020-12-09 15:36:05,561 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 15:36:05,562 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:36:05,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:36:05,572 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:36:05,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:36:06,332 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:36:06,484 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 38 [2020-12-09 15:36:06,631 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 43 [2020-12-09 15:36:06,807 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 46 [2020-12-09 15:36:06,953 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2020-12-09 15:36:07,119 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 50 [2020-12-09 15:36:07,384 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 53 [2020-12-09 15:36:07,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:36:07,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [3, 3, 3] total 13 [2020-12-09 15:36:07,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801949316] [2020-12-09 15:36:07,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 15:36:07,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:36:07,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 15:36:07,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-09 15:36:07,496 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand 10 states. [2020-12-09 15:36:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:36:07,759 INFO L93 Difference]: Finished difference Result 127 states and 178 transitions. [2020-12-09 15:36:07,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 15:36:07,759 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-12-09 15:36:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:36:07,761 INFO L225 Difference]: With dead ends: 127 [2020-12-09 15:36:07,761 INFO L226 Difference]: Without dead ends: 84 [2020-12-09 15:36:07,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-12-09 15:36:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-09 15:36:07,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2020-12-09 15:36:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-09 15:36:07,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 109 transitions. [2020-12-09 15:36:07,774 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 109 transitions. Word has length 23 [2020-12-09 15:36:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:36:07,774 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 109 transitions. [2020-12-09 15:36:07,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 15:36:07,775 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 109 transitions. [2020-12-09 15:36:07,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 15:36:07,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:36:07,776 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:36:07,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:36:07,977 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:36:07,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:36:07,977 INFO L82 PathProgramCache]: Analyzing trace with hash -696076654, now seen corresponding path program 1 times [2020-12-09 15:36:07,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:36:07,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331959280] [2020-12-09 15:36:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:36:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:36:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 15:36:08,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331959280] [2020-12-09 15:36:08,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075471192] [2020-12-09 15:36:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/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 15:36:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 15:36:08,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 15:36:08,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 15:36:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-09 15:36:08,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 15:36:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 15:36:08,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639191892] [2020-12-09 15:36:08,166 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-09 15:36:08,166 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 15:36:08,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 15:36:08,166 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 15:36:08,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 15:36:08,709 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 15:36:09,403 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 15:36:09,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 15:36:09,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2020-12-09 15:36:09,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044405116] [2020-12-09 15:36:09,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 15:36:09,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 15:36:09,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 15:36:09,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-12-09 15:36:09,405 INFO L87 Difference]: Start difference. First operand 76 states and 109 transitions. Second operand 7 states. [2020-12-09 15:36:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 15:36:09,440 INFO L93 Difference]: Finished difference Result 143 states and 207 transitions. [2020-12-09 15:36:09,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 15:36:09,441 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-12-09 15:36:09,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 15:36:09,441 INFO L225 Difference]: With dead ends: 143 [2020-12-09 15:36:09,442 INFO L226 Difference]: Without dead ends: 100 [2020-12-09 15:36:09,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-12-09 15:36:09,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-09 15:36:09,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 44. [2020-12-09 15:36:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 15:36:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2020-12-09 15:36:09,448 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 28 [2020-12-09 15:36:09,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 15:36:09,448 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2020-12-09 15:36:09,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 15:36:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2020-12-09 15:36:09,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 15:36:09,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 15:36:09,449 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 15:36:09,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 15:36:09,650 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 15:36:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 15:36:09,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2113473296, now seen corresponding path program 2 times [2020-12-09 15:36:09,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 15:36:09,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331638880] [2020-12-09 15:36:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 15:36:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 15:36:09,663 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 15:36:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 15:36:09,675 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 15:36:09,691 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 15:36:09,691 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 15:36:09,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2020-12-09 15:36:09,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 03:36:09 BoogieIcfgContainer [2020-12-09 15:36:09,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 15:36:09,723 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 15:36:09,723 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 15:36:09,723 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 15:36:09,723 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 03:36:04" (3/4) ... [2020-12-09 15:36:09,725 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 15:36:09,762 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5e860fd6-4e1c-407f-9230-c5a3e0723912/bin/utaipan/witness.graphml [2020-12-09 15:36:09,762 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 15:36:09,763 INFO L168 Benchmark]: Toolchain (without parser) took 6218.63 ms. Allocated memory was 113.2 MB in the beginning and 207.6 MB in the end (delta: 94.4 MB). Free memory was 76.3 MB in the beginning and 95.8 MB in the end (delta: -19.5 MB). Peak memory consumption was 75.6 MB. Max. memory is 16.1 GB. [2020-12-09 15:36:09,763 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 113.2 MB. Free memory is still 92.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 15:36:09,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 179.27 ms. Allocated memory is still 113.2 MB. Free memory was 76.1 MB in the beginning and 89.1 MB in the end (delta: -13.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 15:36:09,764 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.90 ms. Allocated memory is still 113.2 MB. Free memory was 89.1 MB in the beginning and 87.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:36:09,765 INFO L168 Benchmark]: Boogie Preprocessor took 23.32 ms. Allocated memory is still 113.2 MB. Free memory was 87.5 MB in the beginning and 86.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 15:36:09,765 INFO L168 Benchmark]: RCFGBuilder took 410.60 ms. Allocated memory is still 113.2 MB. Free memory was 86.3 MB in the beginning and 56.9 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-12-09 15:36:09,766 INFO L168 Benchmark]: TraceAbstraction took 5526.86 ms. Allocated memory was 113.2 MB in the beginning and 207.6 MB in the end (delta: 94.4 MB). Free memory was 56.4 MB in the beginning and 98.9 MB in the end (delta: -42.5 MB). Peak memory consumption was 52.8 MB. Max. memory is 16.1 GB. [2020-12-09 15:36:09,766 INFO L168 Benchmark]: Witness Printer took 39.04 ms. Allocated memory is still 207.6 MB. Free memory was 98.9 MB in the beginning and 95.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 15:36:09,769 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 113.2 MB. Free memory is still 92.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 179.27 ms. Allocated memory is still 113.2 MB. Free memory was 76.1 MB in the beginning and 89.1 MB in the end (delta: -13.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.90 ms. Allocated memory is still 113.2 MB. Free memory was 89.1 MB in the beginning and 87.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.32 ms. Allocated memory is still 113.2 MB. Free memory was 87.5 MB in the beginning and 86.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 410.60 ms. Allocated memory is still 113.2 MB. Free memory was 86.3 MB in the beginning and 56.9 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5526.86 ms. Allocated memory was 113.2 MB in the beginning and 207.6 MB in the end (delta: 94.4 MB). Free memory was 56.4 MB in the beginning and 98.9 MB in the end (delta: -42.5 MB). Peak memory consumption was 52.8 MB. Max. memory is 16.1 GB. * Witness Printer took 39.04 ms. Allocated memory is still 207.6 MB. Free memory was 98.9 MB in the beginning and 95.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L11] int ldv_mutex = 1; [L13] int open_called = 0; [L76] int ldv_s_misc_fops_file_operations = 0; [L71] open_called = 0 [L72] return 0; [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L83] COND TRUE ldv_s_misc_fops_file_operations==0 [L59] COND TRUE __VERIFIER_nondet_int() [L61] return 1; [L85] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L91] COND TRUE ldv_s_misc_fops_file_operations==1 [L54] return 0; [L93] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: [L99] COND TRUE ldv_s_misc_fops_file_operations==2 [L50] return 0; [L101] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: [L106] case 3: VAL [ldv_mutex=1, open_called=0] [L107] COND TRUE ldv_s_misc_fops_file_operations==3 [L36] COND FALSE !(\read(open_called)) VAL [ldv_mutex=1, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [ldv_mutex=1, open_called=0] [L19] ldv_mutex = 2 VAL [ldv_mutex=2, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [ldv_mutex=2, open_called=0] [L6] reach_error() VAL [ldv_mutex=2, open_called=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.4s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 195 SDtfs, 49 SDslu, 176 SDs, 0 SdLazy, 187 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 236 GetRequests, 192 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=6, 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, 7 MinimizatonAttempts, 67 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 220 NumberOfCodeBlocks, 220 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 262 ConstructedInterpolants, 0 QuantifiedInterpolants, 13356 SizeOfPredicates, 30 NumberOfNonLiveVariables, 328 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 38/129 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 771, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 13, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 25, TOOLS_POST_TIME[ms]: 302, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 25, TOOLS_QUANTIFIERELIM_TIME[ms]: 292, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 109, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 40, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 5, DOMAIN_JOIN_TIME[ms]: 332, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 54, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 4, DOMAIN_ISBOTTOM_APPLICATIONS: 13, DOMAIN_ISBOTTOM_TIME[ms]: 27, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 330, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 329, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 12, DAG_COMPRESSION_PROCESSED_NODES: 165, DAG_COMPRESSION_RETAINED_NODES: 44, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...