./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test23-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF --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 6107b0424f9f7d96b4a493f3ee8e42c81c6509c50d1ec834cc7d1fa0b8a2c5d3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:52:19,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:52:19,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:52:19,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:52:19,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:52:19,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:52:19,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:52:19,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:52:19,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:52:19,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:52:19,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:52:19,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:52:19,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:52:19,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:52:19,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:52:19,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:52:19,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:52:19,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:52:19,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:52:19,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:52:19,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:52:19,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:52:19,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:52:19,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:52:19,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:52:19,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:52:19,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:52:19,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:52:19,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:52:19,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:52:19,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:52:19,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:52:19,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:52:19,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:52:19,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:52:19,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:52:19,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:52:19,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:52:19,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:52:19,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:52:19,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:52:19,128 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:52:19,173 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:52:19,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:52:19,176 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:52:19,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:52:19,176 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:52:19,177 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:52:19,177 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:52:19,177 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:52:19,177 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:52:19,178 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:52:19,179 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:52:19,179 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:52:19,179 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:52:19,180 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:52:19,180 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:52:19,180 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:52:19,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:52:19,181 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:52:19,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:52:19,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:52:19,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:52:19,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:52:19,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:52:19,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:52:19,183 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:52:19,183 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:52:19,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:52:19,184 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:52:19,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:52:19,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:52:19,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:52:19,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:52:19,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:52:19,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:52:19,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:52:19,188 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:52:19,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:52:19,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:52:19,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:52:19,189 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:52:19,189 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_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6107b0424f9f7d96b4a493f3ee8e42c81c6509c50d1ec834cc7d1fa0b8a2c5d3 [2021-11-12 22:52:19,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:52:19,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:52:19,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:52:19,545 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:52:19,546 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:52:19,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-regression/test23-2.c [2021-11-12 22:52:19,636 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/data/27c65fb61/5a535fc22c2d47dd979b27ca162dfdc2/FLAG047464010 [2021-11-12 22:52:20,085 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:52:20,085 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/sv-benchmarks/c/ldv-regression/test23-2.c [2021-11-12 22:52:20,091 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/data/27c65fb61/5a535fc22c2d47dd979b27ca162dfdc2/FLAG047464010 [2021-11-12 22:52:20,509 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/data/27c65fb61/5a535fc22c2d47dd979b27ca162dfdc2 [2021-11-12 22:52:20,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:52:20,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:52:20,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:20,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:52:20,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:52:20,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:20" (1/1) ... [2021-11-12 22:52:20,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59efd505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:20, skipping insertion in model container [2021-11-12 22:52:20,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:20" (1/1) ... [2021-11-12 22:52:20,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:52:20,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:52:20,745 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/sv-benchmarks/c/ldv-regression/test23-2.c[1070,1083] [2021-11-12 22:52:20,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:20,758 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:52:20,776 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/sv-benchmarks/c/ldv-regression/test23-2.c[1070,1083] [2021-11-12 22:52:20,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:20,789 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:52:20,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:20 WrapperNode [2021-11-12 22:52:20,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:20,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:52:20,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:52:20,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:52:20,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:20" (1/1) ... [2021-11-12 22:52:20,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:20" (1/1) ... [2021-11-12 22:52:20,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:52:20,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:52:20,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:52:20,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:52:20,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:20" (1/1) ... [2021-11-12 22:52:20,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:20" (1/1) ... [2021-11-12 22:52:20,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:20" (1/1) ... [2021-11-12 22:52:20,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:20" (1/1) ... [2021-11-12 22:52:20,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:20" (1/1) ... [2021-11-12 22:52:20,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:20" (1/1) ... [2021-11-12 22:52:20,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:20" (1/1) ... [2021-11-12 22:52:20,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:52:20,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:52:20,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:52:20,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:52:20,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:20" (1/1) ... [2021-11-12 22:52:20,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:52:20,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:52:20,940 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:52:20,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:52:20,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:52:20,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:52:20,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-12 22:52:20,993 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2021-11-12 22:52:20,994 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2021-11-12 22:52:20,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:52:20,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:52:20,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-12 22:52:21,305 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:52:21,305 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:52:21,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:52:21 BoogieIcfgContainer [2021-11-12 22:52:21,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:52:21,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:52:21,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:52:21,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:52:21,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:52:20" (1/3) ... [2021-11-12 22:52:21,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b87eb6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:52:21, skipping insertion in model container [2021-11-12 22:52:21,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:20" (2/3) ... [2021-11-12 22:52:21,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b87eb6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:52:21, skipping insertion in model container [2021-11-12 22:52:21,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:52:21" (3/3) ... [2021-11-12 22:52:21,317 INFO L111 eAbstractionObserver]: Analyzing ICFG test23-2.c [2021-11-12 22:52:21,322 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:52:21,323 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:52:21,372 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:52:21,380 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:52:21,380 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:52:21,397 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:52:21,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 22:52:21,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:21,403 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:21,404 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:21,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:21,410 INFO L85 PathProgramCache]: Analyzing trace with hash 835561940, now seen corresponding path program 1 times [2021-11-12 22:52:21,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:52:21,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347503921] [2021-11-12 22:52:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:21,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:52:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:52:21,661 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:52:21,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347503921] [2021-11-12 22:52:21,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347503921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:21,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:21,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-12 22:52:21,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129385890] [2021-11-12 22:52:21,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:21,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:52:21,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:52:21,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:52:21,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:52:21,711 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:52:21,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:21,747 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-11-12 22:52:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:52:21,750 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-11-12 22:52:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:21,760 INFO L225 Difference]: With dead ends: 24 [2021-11-12 22:52:21,760 INFO L226 Difference]: Without dead ends: 14 [2021-11-12 22:52:21,765 INFO L932 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 [2021-11-12 22:52:21,775 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.61ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:21,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 4 Unknown, 0 Unchecked, 0.61ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 19.33ms Time] [2021-11-12 22:52:21,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-12 22:52:21,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-12 22:52:21,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:52:21,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-12 22:52:21,816 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 14 [2021-11-12 22:52:21,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:21,820 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-12 22:52:21,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:52:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-12 22:52:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 22:52:21,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:21,826 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:21,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:52:21,827 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:21,828 INFO L85 PathProgramCache]: Analyzing trace with hash 125333704, now seen corresponding path program 1 times [2021-11-12 22:52:21,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:52:21,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44680803] [2021-11-12 22:52:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:21,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:52:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:52:22,082 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:52:22,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44680803] [2021-11-12 22:52:22,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44680803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:22,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:22,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:52:22,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501914451] [2021-11-12 22:52:22,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:22,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:52:22,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:52:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:52:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:52:22,086 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:52:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:22,139 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-11-12 22:52:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:52:22,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-11-12 22:52:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:22,141 INFO L225 Difference]: With dead ends: 20 [2021-11-12 22:52:22,141 INFO L226 Difference]: Without dead ends: 16 [2021-11-12 22:52:22,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:52:22,143 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.81ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:22,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 20 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 33.81ms Time] [2021-11-12 22:52:22,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-12 22:52:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-12 22:52:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:52:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-12 22:52:22,150 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 15 [2021-11-12 22:52:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:22,151 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-12 22:52:22,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:52:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-12 22:52:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-12 22:52:22,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:22,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:22,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:52:22,153 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:22,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:22,154 INFO L85 PathProgramCache]: Analyzing trace with hash 214916579, now seen corresponding path program 1 times [2021-11-12 22:52:22,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:52:22,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606394247] [2021-11-12 22:52:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:22,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:52:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:22,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:52:22,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:52:22,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606394247] [2021-11-12 22:52:22,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606394247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:52:22,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663494208] [2021-11-12 22:52:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:22,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:52:22,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:52:22,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:52:22,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 22:52:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:22,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:52:22,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:22,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 61 treesize of output 57 [2021-11-12 22:52:22,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-12 22:52:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:52:22,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:22,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-12 22:52:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:52:22,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663494208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:22,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [242282792] [2021-11-12 22:52:22,828 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-12 22:52:22,828 INFO L166 IcfgInterpreter]: Building call graph [2021-11-12 22:52:22,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-12 22:52:22,838 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-12 22:52:22,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-12 22:52:22,875 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,878 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:52:22,879 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,880 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-12 22:52:22,888 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:52:22,889 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,890 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:52:22,891 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-11-12 22:52:22,893 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-12 22:52:22,894 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:52:22,894 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,896 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:52:22,897 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,897 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-11-12 22:52:22,898 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-12 22:52:22,899 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:52:22,900 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,901 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:52:22,901 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,902 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-12 22:52:22,903 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-12 22:52:22,903 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:52:22,904 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,905 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:52:22,906 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,907 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-11-12 22:52:22,908 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-12 22:52:22,908 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:52:22,909 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,910 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:52:22,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,911 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-11-12 22:52:22,912 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 84 [2021-11-12 22:52:22,913 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:52:22,914 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,915 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 123 [2021-11-12 22:52:22,916 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-12 22:52:22,917 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,917 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-11-12 22:52:22,920 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 296 [2021-11-12 22:52:22,937 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_15|], 55=[|v_#valid_16|]} [2021-11-12 22:52:22,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:22,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:22,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:22,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:22,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:22,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:22,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:22,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:22,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:22,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:22,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 21 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 26 [2021-11-12 22:52:22,977 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 22:52:22,979 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:22,980 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-11-12 22:52:22,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-12 22:52:22,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:52:23,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:23,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:52:23,139 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-12 22:52:23,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 50 [2021-11-12 22:52:23,140 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:23,146 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 22:52:23,147 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:23,148 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-12 22:52:23,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-12 22:52:23,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-12 22:52:23,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-12 22:52:23,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:23,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:52:23,386 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: incompatible size at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:210) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:63) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:573) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.doElimAllRec(ElimStorePlain.java:444) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:242) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:402) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:228) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-12 22:52:23,390 INFO L158 Benchmark]: Toolchain (without parser) took 2871.40ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 51.6MB in the beginning and 74.1MB in the end (delta: -22.4MB). Peak memory consumption was 34.8MB. Max. memory is 16.1GB. [2021-11-12 22:52:23,390 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 86.0MB. Free memory was 58.5MB in the beginning and 58.5MB in the end (delta: 27.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:52:23,391 INFO L158 Benchmark]: CACSL2BoogieTranslator took 269.65ms. Allocated memory is still 86.0MB. Free memory was 51.3MB in the beginning and 62.6MB in the end (delta: -11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:52:23,391 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.22ms. Allocated memory is still 86.0MB. Free memory was 62.6MB in the beginning and 60.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:52:23,395 INFO L158 Benchmark]: Boogie Preprocessor took 60.52ms. Allocated memory is still 86.0MB. Free memory was 60.8MB in the beginning and 59.5MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-12 22:52:23,396 INFO L158 Benchmark]: RCFGBuilder took 403.68ms. Allocated memory is still 86.0MB. Free memory was 59.5MB in the beginning and 45.9MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 22:52:23,396 INFO L158 Benchmark]: TraceAbstraction took 2079.48ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 45.5MB in the beginning and 74.1MB in the end (delta: -28.6MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2021-11-12 22:52:23,399 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 86.0MB. Free memory was 58.5MB in the beginning and 58.5MB in the end (delta: 27.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 269.65ms. Allocated memory is still 86.0MB. Free memory was 51.3MB in the beginning and 62.6MB in the end (delta: -11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.22ms. Allocated memory is still 86.0MB. Free memory was 62.6MB in the beginning and 60.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 60.52ms. Allocated memory is still 86.0MB. Free memory was 60.8MB in the beginning and 59.5MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 403.68ms. Allocated memory is still 86.0MB. Free memory was 59.5MB in the beginning and 45.9MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 2079.48ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 45.5MB in the beginning and 74.1MB in the end (delta: -28.6MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: incompatible size de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: incompatible size: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:210) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-12 22:52:23,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF --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 6107b0424f9f7d96b4a493f3ee8e42c81c6509c50d1ec834cc7d1fa0b8a2c5d3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:52:25,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:52:25,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:52:25,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:52:25,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:52:25,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:52:25,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:52:25,918 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:52:25,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:52:25,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:52:25,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:52:25,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:52:25,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:52:25,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:52:25,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:52:25,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:52:25,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:52:25,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:52:25,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:52:25,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:52:25,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:52:25,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:52:25,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:52:25,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:52:25,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:52:25,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:52:25,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:52:25,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:52:25,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:52:25,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:52:25,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:52:25,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:52:25,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:52:25,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:52:25,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:52:25,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:52:25,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:52:25,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:52:25,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:52:25,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:52:25,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:52:25,968 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:52:26,013 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:52:26,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:52:26,015 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:52:26,015 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:52:26,015 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:52:26,015 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:52:26,016 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:52:26,016 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:52:26,016 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:52:26,016 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:52:26,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:52:26,019 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:52:26,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:52:26,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:52:26,020 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:52:26,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:52:26,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:52:26,020 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:52:26,021 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:52:26,021 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:52:26,021 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:52:26,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:52:26,021 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:52:26,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:52:26,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:52:26,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:52:26,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:52:26,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:52:26,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:52:26,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:52:26,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:52:26,024 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:52:26,024 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:26,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:52:26,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:52:26,025 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:52:26,025 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6107b0424f9f7d96b4a493f3ee8e42c81c6509c50d1ec834cc7d1fa0b8a2c5d3 [2021-11-12 22:52:26,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:52:26,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:52:26,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:52:26,455 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:52:26,458 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:52:26,460 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-regression/test23-2.c [2021-11-12 22:52:26,535 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/data/189fe226e/b972109ad9074ed589dd381ef53580a3/FLAGa56bb2547 [2021-11-12 22:52:27,057 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:52:27,057 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/sv-benchmarks/c/ldv-regression/test23-2.c [2021-11-12 22:52:27,063 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/data/189fe226e/b972109ad9074ed589dd381ef53580a3/FLAGa56bb2547 [2021-11-12 22:52:27,447 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/data/189fe226e/b972109ad9074ed589dd381ef53580a3 [2021-11-12 22:52:27,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:52:27,450 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:52:27,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:27,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:52:27,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:52:27,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c1f5d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:27, skipping insertion in model container [2021-11-12 22:52:27,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:52:27,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:52:27,635 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/sv-benchmarks/c/ldv-regression/test23-2.c[1070,1083] [2021-11-12 22:52:27,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:27,650 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:52:27,669 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/sv-benchmarks/c/ldv-regression/test23-2.c[1070,1083] [2021-11-12 22:52:27,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:52:27,699 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:52:27,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:27 WrapperNode [2021-11-12 22:52:27,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:52:27,701 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:52:27,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:52:27,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:52:27,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,780 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:52:27,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:52:27,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:52:27,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:52:27,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:52:27,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:52:27,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:52:27,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:52:27,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:27" (1/1) ... [2021-11-12 22:52:27,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:52:27,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:52:27,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:52:27,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:52:27,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:52:27,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:52:27,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:52:27,912 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2021-11-12 22:52:27,912 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2021-11-12 22:52:27,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:52:27,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:52:27,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:52:28,190 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:52:28,191 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:52:28,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:52:28 BoogieIcfgContainer [2021-11-12 22:52:28,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:52:28,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:52:28,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:52:28,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:52:28,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:52:27" (1/3) ... [2021-11-12 22:52:28,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dae704d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:52:28, skipping insertion in model container [2021-11-12 22:52:28,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:52:27" (2/3) ... [2021-11-12 22:52:28,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dae704d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:52:28, skipping insertion in model container [2021-11-12 22:52:28,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:52:28" (3/3) ... [2021-11-12 22:52:28,201 INFO L111 eAbstractionObserver]: Analyzing ICFG test23-2.c [2021-11-12 22:52:28,206 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:52:28,207 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:52:28,294 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:52:28,317 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:52:28,317 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:52:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:52:28,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-12 22:52:28,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:28,345 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:28,345 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:28,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:28,365 INFO L85 PathProgramCache]: Analyzing trace with hash -203522095, now seen corresponding path program 1 times [2021-11-12 22:52:28,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:28,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062708484] [2021-11-12 22:52:28,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:28,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:28,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:28,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:28,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:52:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:28,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:52:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:52:28,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:52:28,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:28,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062708484] [2021-11-12 22:52:28,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062708484] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:28,659 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:28,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:52:28,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057212523] [2021-11-12 22:52:28,662 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:28,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:52:28,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:28,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:52:28,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:52:28,700 INFO L87 Difference]: Start difference. First operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:52:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:28,723 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-11-12 22:52:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:52:28,725 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-11-12 22:52:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:28,732 INFO L225 Difference]: With dead ends: 32 [2021-11-12 22:52:28,732 INFO L226 Difference]: Without dead ends: 19 [2021-11-12 22:52:28,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:52:28,743 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:28,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:52:28,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-12 22:52:28,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-12 22:52:28,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:52:28,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-12 22:52:28,790 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 21 [2021-11-12 22:52:28,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:28,794 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-12 22:52:28,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-12 22:52:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-12 22:52:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-12 22:52:28,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:28,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:28,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:29,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:29,017 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:29,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:29,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2074741797, now seen corresponding path program 1 times [2021-11-12 22:52:29,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:29,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926566308] [2021-11-12 22:52:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:29,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:29,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:29,023 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:29,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:52:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:29,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-12 22:52:29,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:29,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-12 22:52:29,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-12 22:52:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:52:29,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:29,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 56 [2021-11-12 22:52:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:52:30,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:30,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926566308] [2021-11-12 22:52:30,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926566308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:52:30,056 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:52:30,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 12 [2021-11-12 22:52:30,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842726722] [2021-11-12 22:52:30,056 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:52:30,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 22:52:30,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:30,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 22:52:30,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:52:30,061 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:52:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:30,875 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-11-12 22:52:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 22:52:30,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-11-12 22:52:30,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:30,883 INFO L225 Difference]: With dead ends: 48 [2021-11-12 22:52:30,883 INFO L226 Difference]: Without dead ends: 43 [2021-11-12 22:52:30,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:52:30,886 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 208.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.58ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 252.84ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:30,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 102 Invalid, 119 Unknown, 0 Unchecked, 4.58ms Time], IncrementalHoareTripleChecker [11 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 252.84ms Time] [2021-11-12 22:52:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-12 22:52:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 23. [2021-11-12 22:52:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:52:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-11-12 22:52:30,895 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 22 [2021-11-12 22:52:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:30,896 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-11-12 22:52:30,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:52:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-11-12 22:52:30,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-12 22:52:30,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:30,897 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:30,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:31,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:31,112 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:31,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1831225711, now seen corresponding path program 1 times [2021-11-12 22:52:31,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:31,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866246019] [2021-11-12 22:52:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:31,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:31,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:31,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:31,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:52:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:31,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 22:52:31,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:31,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-12 22:52:31,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-12 22:52:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:52:31,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:32,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2021-11-12 22:52:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:52:32,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:32,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866246019] [2021-11-12 22:52:32,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866246019] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:32,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [167476886] [2021-11-12 22:52:32,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:32,484 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:32,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:52:32,490 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:52:32,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 22:52:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:32,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-12 22:52:32,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:32,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-12 22:52:32,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-12 22:52:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:52:32,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:33,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 156 [2021-11-12 22:52:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:52:33,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [167476886] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:33,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967512939] [2021-11-12 22:52:33,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:33,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:52:33,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:52:33,586 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:52:33,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-12 22:52:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:33,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-12 22:52:33,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:34,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-12 22:52:34,847 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-12 22:52:34,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 21 [2021-11-12 22:52:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:52:34,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:34,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2021-11-12 22:52:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:52:35,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967512939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:35,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:52:35,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14, 14, 13, 13] total 32 [2021-11-12 22:52:35,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595698868] [2021-11-12 22:52:35,250 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:52:35,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 22:52:35,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:35,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 22:52:35,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-11-12 22:52:35,253 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 32 states, 30 states have (on average 1.5) internal successors, (45), 28 states have internal predecessors, (45), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:52:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:38,299 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2021-11-12 22:52:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-12 22:52:38,300 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.5) internal successors, (45), 28 states have internal predecessors, (45), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2021-11-12 22:52:38,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:38,302 INFO L225 Difference]: With dead ends: 69 [2021-11-12 22:52:38,302 INFO L226 Difference]: Without dead ends: 64 [2021-11-12 22:52:38,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=718, Invalid=3442, Unknown=0, NotChecked=0, Total=4160 [2021-11-12 22:52:38,305 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 522.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.63ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 602.57ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:38,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 183 Invalid, 423 Unknown, 0 Unchecked, 5.63ms Time], IncrementalHoareTripleChecker [41 Valid, 320 Invalid, 0 Unknown, 62 Unchecked, 602.57ms Time] [2021-11-12 22:52:38,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-12 22:52:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 31. [2021-11-12 22:52:38,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-12 22:52:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-12 22:52:38,316 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2021-11-12 22:52:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:38,317 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-12 22:52:38,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.5) internal successors, (45), 28 states have internal predecessors, (45), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:52:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-12 22:52:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-12 22:52:38,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:38,319 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:38,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-12 22:52:38,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 22:52:38,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:38,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:52:38,921 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:38,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2147080957, now seen corresponding path program 2 times [2021-11-12 22:52:38,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:38,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467292695] [2021-11-12 22:52:38,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:52:38,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:38,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:38,928 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:38,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:52:39,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:52:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:52:39,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 22:52:39,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:39,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-12 22:52:39,952 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-12 22:52:39,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 21 [2021-11-12 22:52:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:52:40,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:52:40,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:40,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467292695] [2021-11-12 22:52:40,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467292695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:40,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [919099033] [2021-11-12 22:52:40,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:52:40,783 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:40,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:52:40,788 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:52:40,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 22:52:40,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:52:40,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:52:40,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-12 22:52:40,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:41,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 45 treesize of output 41 [2021-11-12 22:52:42,449 INFO L354 Elim1Store]: treesize reduction 15, result has 16.7 percent of original size [2021-11-12 22:52:42,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 21 [2021-11-12 22:52:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:52:42,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:52:43,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [919099033] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:43,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824991283] [2021-11-12 22:52:43,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:52:43,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:52:43,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:52:43,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:52:43,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 22:52:43,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:52:43,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:52:43,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-12 22:52:43,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:44,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 45 treesize of output 41 [2021-11-12 22:52:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:52:46,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:50,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2021-11-12 22:52:50,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 65 [2021-11-12 22:52:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:52:50,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824991283] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:50,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:52:50,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 16, 12, 18, 17] total 70 [2021-11-12 22:52:50,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685131338] [2021-11-12 22:52:50,633 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:52:50,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-12 22:52:50,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:50,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-12 22:52:50,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=3915, Unknown=0, NotChecked=0, Total=4830 [2021-11-12 22:52:50,638 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 70 states, 70 states have (on average 1.6428571428571428) internal successors, (115), 69 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:52:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:58,029 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-11-12 22:52:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-12 22:52:58,030 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.6428571428571428) internal successors, (115), 69 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-11-12 22:52:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:58,031 INFO L225 Difference]: With dead ends: 70 [2021-11-12 22:52:58,031 INFO L226 Difference]: Without dead ends: 62 [2021-11-12 22:52:58,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3410 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=1880, Invalid=7822, Unknown=0, NotChecked=0, Total=9702 [2021-11-12 22:52:58,036 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 584.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.15ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 670.19ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:58,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 235 Invalid, 287 Unknown, 0 Unchecked, 3.15ms Time], IncrementalHoareTripleChecker [44 Valid, 208 Invalid, 0 Unknown, 35 Unchecked, 670.19ms Time] [2021-11-12 22:52:58,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-12 22:52:58,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2021-11-12 22:52:58,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:52:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-11-12 22:52:58,051 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 34 [2021-11-12 22:52:58,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:58,052 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-11-12 22:52:58,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.6428571428571428) internal successors, (115), 69 states have internal predecessors, (115), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:52:58,052 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-11-12 22:52:58,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-12 22:52:58,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:58,054 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:58,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-12 22:52:58,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-12 22:52:58,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-12 22:52:58,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:52:58,660 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:52:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:58,660 INFO L85 PathProgramCache]: Analyzing trace with hash -188659450, now seen corresponding path program 1 times [2021-11-12 22:52:58,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:58,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936095711] [2021-11-12 22:52:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:58,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:58,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:58,662 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:58,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:52:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:58,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:52:58,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:58,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 158 [2021-11-12 22:52:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:52:58,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-12 22:52:59,089 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:59,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936095711] [2021-11-12 22:52:59,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936095711] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:59,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [814121779] [2021-11-12 22:52:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:59,090 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:59,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:52:59,103 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:52:59,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 22:52:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:59,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:52:59,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:59,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 342 treesize of output 334 [2021-11-12 22:52:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:52:59,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-12 22:52:59,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [814121779] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:59,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879327216] [2021-11-12 22:52:59,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:52:59,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:52:59,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:52:59,511 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:52:59,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-12 22:52:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:52:59,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:52:59,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:59,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 79 [2021-11-12 22:52:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 22:52:59,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-12 22:52:59,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879327216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:59,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:52:59,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 13 [2021-11-12 22:52:59,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524793696] [2021-11-12 22:52:59,834 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:52:59,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:52:59,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:59,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:52:59,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:52:59,835 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 22:53:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:00,117 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2021-11-12 22:53:00,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:53:00,118 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-11-12 22:53:00,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:00,119 INFO L225 Difference]: With dead ends: 110 [2021-11-12 22:53:00,119 INFO L226 Difference]: Without dead ends: 87 [2021-11-12 22:53:00,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-12 22:53:00,121 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 149.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.88ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 173.29ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:00,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 180 Invalid, 140 Unknown, 0 Unchecked, 1.88ms Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 173.29ms Time] [2021-11-12 22:53:00,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-12 22:53:00,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 52. [2021-11-12 22:53:00,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-12 22:53:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-11-12 22:53:00,135 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 36 [2021-11-12 22:53:00,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:00,136 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-11-12 22:53:00,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 22:53:00,136 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-11-12 22:53:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-12 22:53:00,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:00,138 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:00,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:00,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:00,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:00,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:00,755 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:00,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:00,756 INFO L85 PathProgramCache]: Analyzing trace with hash 86100164, now seen corresponding path program 1 times [2021-11-12 22:53:00,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:00,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936466212] [2021-11-12 22:53:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:00,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:00,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:00,758 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:00,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:53:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:00,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-12 22:53:00,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:00,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-12 22:53:01,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-12 22:53:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:53:01,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:02,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2021-11-12 22:53:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:53:03,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:03,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936466212] [2021-11-12 22:53:03,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936466212] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:03,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [515403131] [2021-11-12 22:53:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:03,050 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:03,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:03,051 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:03,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:53:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:03,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-12 22:53:03,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:03,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-12 22:53:03,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-11-12 22:53:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:53:03,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:03,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2021-11-12 22:53:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:53:04,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [515403131] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:04,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139499363] [2021-11-12 22:53:04,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:53:04,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:53:04,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:53:04,099 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:53:04,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 22:53:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:53:04,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-12 22:53:04,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:04,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-12 22:53:06,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-11-12 22:53:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:53:06,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:06,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 156 [2021-11-12 22:53:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:53:07,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139499363] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:07,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:53:07,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 19, 19] total 47 [2021-11-12 22:53:07,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211654314] [2021-11-12 22:53:07,001 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:53:07,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-12 22:53:07,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:53:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-12 22:53:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1848, Unknown=0, NotChecked=0, Total=2162 [2021-11-12 22:53:07,003 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 47 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 43 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:53:20,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:53:20,098 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2021-11-12 22:53:20,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-12 22:53:20,100 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 43 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-11-12 22:53:20,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:53:20,101 INFO L225 Difference]: With dead ends: 135 [2021-11-12 22:53:20,101 INFO L226 Difference]: Without dead ends: 130 [2021-11-12 22:53:20,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 160 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3993 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=2004, Invalid=10878, Unknown=0, NotChecked=0, Total=12882 [2021-11-12 22:53:20,106 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 216 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1476.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.80ms SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1626.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:53:20,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 398 Invalid, 848 Unknown, 0 Unchecked, 7.80ms Time], IncrementalHoareTripleChecker [140 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 1626.12ms Time] [2021-11-12 22:53:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-12 22:53:20,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 80. [2021-11-12 22:53:20,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-12 22:53:20,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2021-11-12 22:53:20,127 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 36 [2021-11-12 22:53:20,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:53:20,128 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2021-11-12 22:53:20,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 43 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-12 22:53:20,128 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2021-11-12 22:53:20,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-12 22:53:20,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:53:20,130 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:53:20,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:20,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:20,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:53:20,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:53:20,733 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:53:20,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:53:20,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1500571027, now seen corresponding path program 2 times [2021-11-12 22:53:20,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:53:20,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582601851] [2021-11-12 22:53:20,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:53:20,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:53:20,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:53:20,735 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:53:20,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:53:20,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:53:20,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:53:20,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-12 22:53:20,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:20,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 45 treesize of output 41 [2021-11-12 22:53:23,142 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-12 22:53:23,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 36 [2021-11-12 22:53:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 3 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:53:23,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:53:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:53:26,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:53:26,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582601851] [2021-11-12 22:53:26,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582601851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:53:26,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1898574900] [2021-11-12 22:53:26,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:53:26,670 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:53:26,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:53:26,671 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:53:26,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:53:26,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:53:26,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:53:26,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-12 22:53:26,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:53:26,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 49 [2021-11-12 22:53:26,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 22:53:26,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2021-11-12 22:53:27,086 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-11-12 22:53:27,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 45 [2021-11-12 22:53:27,104 INFO L354 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2021-11-12 22:53:27,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-12 22:54:27,063 INFO L354 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2021-11-12 22:54:27,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 73 [2021-11-12 22:56:09,625 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-12 22:56:09,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2021-11-12 22:56:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 3 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:56:09,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:56:14,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1898574900] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:56:14,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119991839] [2021-11-12 22:56:14,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:56:14,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:56:14,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:56:14,547 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:56:14,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 22:56:14,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:56:14,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:56:14,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-12 22:56:14,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:56:14,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 45 treesize of output 41 [2021-11-12 22:56:39,359 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-12 22:56:39,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 36 [2021-11-12 22:56:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 3 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:56:39,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:56:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:56:41,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119991839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:56:41,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:56:41,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 23, 18, 23, 19] total 79 [2021-11-12 22:56:41,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589245411] [2021-11-12 22:56:41,452 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:56:41,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-12 22:56:41,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:56:41,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-12 22:56:41,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=5226, Unknown=62, NotChecked=0, Total=6162 [2021-11-12 22:56:41,457 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 79 states, 79 states have (on average 1.8354430379746836) internal successors, (145), 77 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:57:28,419 WARN L227 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 64 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:57:36,772 WARN L227 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 64 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:57:44,734 WARN L227 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 137 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:58:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:58:00,907 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2021-11-12 22:58:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-12 22:58:00,907 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.8354430379746836) internal successors, (145), 77 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-11-12 22:58:00,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:58:00,908 INFO L225 Difference]: With dead ends: 110 [2021-11-12 22:58:00,908 INFO L226 Difference]: Without dead ends: 101 [2021-11-12 22:58:00,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4748 ImplicationChecksByTransitivity, 272.4s TimeCoverageRelationStatistics Valid=1926, Invalid=12043, Unknown=73, NotChecked=0, Total=14042 [2021-11-12 22:58:00,913 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 475.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.44ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 532.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:58:00,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 459 Invalid, 541 Unknown, 0 Unchecked, 3.44ms Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 0 Unknown, 345 Unchecked, 532.00ms Time] [2021-11-12 22:58:00,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-12 22:58:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 69. [2021-11-12 22:58:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-12 22:58:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-11-12 22:58:00,933 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 42 [2021-11-12 22:58:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:58:00,934 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-11-12 22:58:00,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.8354430379746836) internal successors, (145), 77 states have internal predecessors, (145), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:58:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-11-12 22:58:00,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-12 22:58:00,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:58:00,937 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:58:00,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:01,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-12 22:58:01,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:58:01,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:58:01,542 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:58:01,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:58:01,542 INFO L85 PathProgramCache]: Analyzing trace with hash 141568629, now seen corresponding path program 3 times [2021-11-12 22:58:01,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:58:01,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680592539] [2021-11-12 22:58:01,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:58:01,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:58:01,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:58:01,544 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:58:01,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:58:01,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:58:01,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:58:01,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 22:58:01,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:01,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 31 treesize of output 27 [2021-11-12 22:58:03,155 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-12 22:58:03,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 38 [2021-11-12 22:58:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 34 proven. 16 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-12 22:58:03,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:58:06,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2021-11-12 22:58:06,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2021-11-12 22:58:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-12 22:58:06,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:58:06,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680592539] [2021-11-12 22:58:06,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680592539] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:58:06,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1450046440] [2021-11-12 22:58:06,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:58:06,727 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:58:06,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:58:06,729 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:58:06,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-12 22:58:06,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:58:06,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:58:06,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-12 22:58:06,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:58:06,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 157 [2021-11-12 22:58:06,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2021-11-12 22:58:07,116 INFO L354 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2021-11-12 22:58:07,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 45 [2021-11-12 22:58:07,152 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-11-12 22:58:07,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-12 22:58:48,482 INFO L354 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2021-11-12 22:58:48,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 57 [2021-11-12 22:59:32,117 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-12 22:59:32,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 87 [2021-11-12 22:59:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 34 proven. 16 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-12 22:59:32,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-12 22:59:33,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1450046440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:59:33,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976821506] [2021-11-12 22:59:33,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:59:33,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:59:33,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:59:33,169 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:59:33,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-12 22:59:33,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-12 22:59:33,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:59:33,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-12 22:59:33,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:33,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 31 treesize of output 27 [2021-11-12 22:59:34,493 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-12 22:59:34,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 38 [2021-11-12 22:59:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 34 proven. 16 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-12 22:59:34,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:59:35,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2021-11-12 22:59:35,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2021-11-12 22:59:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-12 22:59:35,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976821506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:59:35,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:59:35,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 14, 9, 13, 9] total 32 [2021-11-12 22:59:35,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272795782] [2021-11-12 22:59:35,465 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:59:35,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-12 22:59:35,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:59:35,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-12 22:59:35,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=851, Unknown=24, NotChecked=0, Total=992 [2021-11-12 22:59:35,468 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 30 states have internal predecessors, (59), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:59:47,737 WARN L227 SmtUtils]: Spent 12.11s on a formula simplification. DAG size of input: 39 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 22:59:55,271 WARN L227 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 53 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:00:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:00:08,399 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2021-11-12 23:00:08,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 23:00:08,400 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 30 states have internal predecessors, (59), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 54 [2021-11-12 23:00:08,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:00:08,400 INFO L225 Difference]: With dead ends: 106 [2021-11-12 23:00:08,400 INFO L226 Difference]: Without dead ends: 0 [2021-11-12 23:00:08,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 118.0s TimeCoverageRelationStatistics Valid=170, Invalid=1282, Unknown=30, NotChecked=0, Total=1482 [2021-11-12 23:00:08,403 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.80ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 88.19ms IncrementalHoareTripleChecker+Time [2021-11-12 23:00:08,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 75 Invalid, 76 Unknown, 0 Unchecked, 0.80ms Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 53 Unchecked, 88.19ms Time] [2021-11-12 23:00:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-12 23:00:08,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-12 23:00:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-12 23:00:08,405 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-11-12 23:00:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:00:08,405 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-12 23:00:08,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 30 states have internal predecessors, (59), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 23:00:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-12 23:00:08,405 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-12 23:00:08,408 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:00:08,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:08,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:00:08,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-12 23:00:09,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:00:09,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-12 23:00:16,260 WARN L227 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 79 DAG size of output: 1 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 23:02:51,630 WARN L227 SmtUtils]: Spent 2.59m on a formula simplification. DAG size of input: 527 DAG size of output: 44 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 23:02:59,699 WARN L227 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 43 DAG size of output: 29 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 23:03:22,015 WARN L227 SmtUtils]: Spent 22.32s on a formula simplification. DAG size of input: 50 DAG size of output: 43 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-12 23:03:22,022 INFO L858 garLoopResultBuilder]: For program point get_dummyFINAL(lines 23 26) no Hoare annotation was computed. [2021-11-12 23:03:22,022 INFO L858 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-11-12 23:03:22,023 INFO L861 garLoopResultBuilder]: At program point get_dummyENTRY(lines 23 26) the Hoare annotation is: true [2021-11-12 23:03:22,023 INFO L858 garLoopResultBuilder]: For program point get_dummyEXIT(lines 23 26) no Hoare annotation was computed. [2021-11-12 23:03:22,023 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-12 23:03:22,023 INFO L854 garLoopResultBuilder]: At program point L46(lines 34 54) the Hoare annotation is: false [2021-11-12 23:03:22,023 INFO L858 garLoopResultBuilder]: For program point L42-1(lines 42 44) no Hoare annotation was computed. [2021-11-12 23:03:22,023 INFO L854 garLoopResultBuilder]: At program point L42-3(lines 42 44) the Hoare annotation is: (and (= |ULTIMATE.start_main_~pd2~0#1.offset| |ULTIMATE.start_main_~pd1~0#1.offset|) (not (= |~#d2~0.base| |~#d1~0.base|)) (= |ULTIMATE.start_main_~pd1~0#1.base| |ULTIMATE.start_main_~pd2~0#1.base|) (= |~#d2~0.offset| (_ bv0 32)) (= |~#d1~0.offset| (_ bv0 32)) (or (= (select (select |#memory_int| |ULTIMATE.start_main_~pd2~0#1.base|) (bvadd (_ bv8 32) |ULTIMATE.start_main_~pd2~0#1.offset| (bvmul |ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) |ULTIMATE.start_main_~i~0#1|) (bvslt |ULTIMATE.start_main_~i~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~pa~0#1.base|) |ULTIMATE.start_main_~pa~0#1.offset|))) (forall ((|ULTIMATE.start_main_~i~0#1| (_ BitVec 32))) (let ((.cse0 (bvadd |ULTIMATE.start_main_~i~0#1| (_ bv1 32))) (.cse1 (select (select |#memory_int| |ULTIMATE.start_main_~pa~0#1.base|) |ULTIMATE.start_main_~pa~0#1.offset|))) (or (bvslt .cse0 .cse1) (= (select (select |#memory_int| |ULTIMATE.start_main_~pd2~0#1.base|) (bvadd |ULTIMATE.start_main_~pd2~0#1.offset| (bvmul |ULTIMATE.start_main_~i~0#1| (_ bv4 32)) (_ bv12 32))) .cse0) (not (bvslt |ULTIMATE.start_main_~i~0#1| .cse1)))))) [2021-11-12 23:03:22,023 INFO L858 garLoopResultBuilder]: For program point L38(lines 38 48) no Hoare annotation was computed. [2021-11-12 23:03:22,023 INFO L858 garLoopResultBuilder]: For program point L42-4(lines 42 44) no Hoare annotation was computed. [2021-11-12 23:03:22,024 INFO L854 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (and (not (= |~#d2~0.base| |~#d1~0.base|)) (exists ((|v_ULTIMATE.start_init_#t~nondet8#1_8| (_ BitVec 32)) (|v_ULTIMATE.start_init_#t~nondet7#1_8| (_ BitVec 32))) (= (select |#memory_int| |~#d1~0.base|) (store (store ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) |~#d1~0.offset| |v_ULTIMATE.start_init_#t~nondet7#1_8|) (bvadd |~#d1~0.offset| (_ bv4 32)) |v_ULTIMATE.start_init_#t~nondet8#1_8|))) (= |~#d2~0.offset| (_ bv0 32)) (= |~#d1~0.offset| (_ bv0 32)) (exists ((|v_ULTIMATE.start_init_#t~nondet9#1_7| (_ BitVec 32)) (|v_ULTIMATE.start_init_#t~nondet10#1_7| (_ BitVec 32))) (= (select |#memory_int| |~#d2~0.base|) (store (store ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) |~#d2~0.offset| |v_ULTIMATE.start_init_#t~nondet9#1_7|) (bvadd (_ bv4 32) |~#d2~0.offset|) |v_ULTIMATE.start_init_#t~nondet10#1_7|)))) [2021-11-12 23:03:22,024 INFO L858 garLoopResultBuilder]: For program point L38-2(lines 38 48) no Hoare annotation was computed. [2021-11-12 23:03:22,024 INFO L858 garLoopResultBuilder]: For program point L36-1(line 36) no Hoare annotation was computed. [2021-11-12 23:03:22,024 INFO L854 garLoopResultBuilder]: At program point L36-2(line 36) the Hoare annotation is: (let ((.cse0 (not (= |~#d2~0.base| |~#d1~0.base|))) (.cse1 (exists ((|v_ULTIMATE.start_init_#t~nondet8#1_8| (_ BitVec 32)) (|v_ULTIMATE.start_init_#t~nondet7#1_8| (_ BitVec 32))) (= (select |#memory_int| |~#d1~0.base|) (store (store ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) |~#d1~0.offset| |v_ULTIMATE.start_init_#t~nondet7#1_8|) (bvadd |~#d1~0.offset| (_ bv4 32)) |v_ULTIMATE.start_init_#t~nondet8#1_8|)))) (.cse2 (= |~#d2~0.offset| (_ bv0 32))) (.cse3 (= |~#d1~0.offset| (_ bv0 32)))) (or (and .cse0 .cse1 (exists ((|v_ULTIMATE.start_init_#t~nondet9#1_8| (_ BitVec 32)) (|~#d2~0.base| (_ BitVec 32)) (|v_ULTIMATE.start_init_#t~nondet10#1_8| (_ BitVec 32))) (and (not (= |~#d2~0.base| |~#d1~0.base|)) (= (select |#memory_int| |~#d2~0.base|) (store (store ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) (_ bv0 32) |v_ULTIMATE.start_init_#t~nondet9#1_8|) (_ bv4 32) |v_ULTIMATE.start_init_#t~nondet10#1_8|)))) .cse2 .cse3 (not (= |ULTIMATE.start_main_~pd1~0#1.base| |~#d2~0.base|))) (and (= |~#d2~0.offset| |ULTIMATE.start_main_~pd1~0#1.offset|) .cse0 .cse1 .cse2 .cse3 (exists ((|v_ULTIMATE.start_init_#t~nondet9#1_7| (_ BitVec 32)) (|v_ULTIMATE.start_init_#t~nondet10#1_7| (_ BitVec 32))) (= (select |#memory_int| |~#d2~0.base|) (store (store ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) |~#d2~0.offset| |v_ULTIMATE.start_init_#t~nondet9#1_7|) (bvadd (_ bv4 32) |~#d2~0.offset|) |v_ULTIMATE.start_init_#t~nondet10#1_7|)))))) [2021-11-12 23:03:22,024 INFO L858 garLoopResultBuilder]: For program point L36-3(line 36) no Hoare annotation was computed. [2021-11-12 23:03:22,024 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-12 23:03:22,024 INFO L854 garLoopResultBuilder]: At program point L30(lines 28 31) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~pd2~0#1.offset| |ULTIMATE.start_main_~pd1~0#1.offset|)) (.cse1 (= |ULTIMATE.start_main_~pd1~0#1.base| |ULTIMATE.start_main_~pd2~0#1.base|)) (.cse3 (= |~#d1~0.offset| (_ bv0 32))) (.cse4 (not (= |ULTIMATE.start_check_#res#1| (_ bv0 32))))) (or (and .cse0 (= (select (select |#memory_int| |ULTIMATE.start_main_~pd2~0#1.base|) (bvadd (_ bv8 32) |ULTIMATE.start_main_~pd2~0#1.offset| (bvmul |ULTIMATE.start_main_~i~0#1| (_ bv4 32)))) |ULTIMATE.start_main_~i~0#1|) .cse1 (let ((.cse2 (select (select |#memory_int| |ULTIMATE.start_main_~pa~0#1.base|) |ULTIMATE.start_main_~pa~0#1.offset|))) (or (not (bvslt (bvadd |ULTIMATE.start_main_~i~0#1| (_ bv1 32)) .cse2)) (bvslt (bvadd |ULTIMATE.start_main_~i~0#1| (_ bv2 32)) .cse2))) .cse3 .cse4) (and .cse0 (not (= |~#d2~0.base| |~#d1~0.base|)) .cse1 (= |~#d2~0.offset| (_ bv0 32)) .cse3 .cse4))) [2021-11-12 23:03:22,025 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-12 23:03:22,025 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-12 23:03:22,025 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 52) no Hoare annotation was computed. [2021-11-12 23:03:22,025 INFO L861 garLoopResultBuilder]: At program point L53(lines 33 54) the Hoare annotation is: true [2021-11-12 23:03:22,025 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 21) no Hoare annotation was computed. [2021-11-12 23:03:22,026 INFO L858 garLoopResultBuilder]: For program point L45(lines 45 47) no Hoare annotation was computed. [2021-11-12 23:03:22,029 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1] [2021-11-12 23:03:22,030 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:03:22,050 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] [2021-11-12 23:03:22,051 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] [2021-11-12 23:03:22,051 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] [2021-11-12 23:03:22,052 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] [2021-11-12 23:03:22,053 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] [2021-11-12 23:03:22,054 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] [2021-11-12 23:03:22,054 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] [2021-11-12 23:03:22,054 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] [2021-11-12 23:03:22,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:03:22 BoogieIcfgContainer [2021-11-12 23:03:22,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:03:22,057 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:03:22,057 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:03:22,057 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:03:22,058 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:52:28" (3/4) ... [2021-11-12 23:03:22,061 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-12 23:03:22,069 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure get_dummy [2021-11-12 23:03:22,075 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-11-12 23:03:22,075 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-12 23:03:22,076 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-12 23:03:22,076 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-12 23:03:22,105 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((pd2 == pd1 && unknown-#memory_int-unknown[pd2][~bvadd64(8bv32, pd2, ~bvmul32(i, 4bv32))] == i) && pd1 == pd2) && (!~bvslt32(~bvadd64(i, 1bv32), unknown-#memory_int-unknown[pa][pa]) || ~bvslt32(~bvadd64(i, 2bv32), unknown-#memory_int-unknown[pa][pa]))) && d1 == 0bv32) && !(\result == 0bv32)) || (((((pd2 == pd1 && !(d2 == d1)) && pd1 == pd2) && d2 == 0bv32) && d1 == 0bv32) && !(\result == 0bv32)) [2021-11-12 23:03:22,117 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-12 23:03:22,118 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:03:22,118 INFO L158 Benchmark]: Toolchain (without parser) took 654667.98ms. Allocated memory was 54.5MB in the beginning and 111.1MB in the end (delta: 56.6MB). Free memory was 31.3MB in the beginning and 45.0MB in the end (delta: -13.7MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2021-11-12 23:03:22,119 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 54.5MB. Free memory was 36.0MB in the beginning and 35.9MB in the end (delta: 38.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:03:22,119 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.91ms. Allocated memory was 54.5MB in the beginning and 75.5MB in the end (delta: 21.0MB). Free memory was 31.1MB in the beginning and 59.3MB in the end (delta: -28.3MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2021-11-12 23:03:22,120 INFO L158 Benchmark]: Boogie Procedure Inliner took 78.96ms. Allocated memory is still 75.5MB. Free memory was 59.1MB in the beginning and 57.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:03:22,120 INFO L158 Benchmark]: Boogie Preprocessor took 41.37ms. Allocated memory is still 75.5MB. Free memory was 57.6MB in the beginning and 56.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:03:22,121 INFO L158 Benchmark]: RCFGBuilder took 367.74ms. Allocated memory is still 75.5MB. Free memory was 56.2MB in the beginning and 44.4MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:03:22,121 INFO L158 Benchmark]: TraceAbstraction took 653861.30ms. Allocated memory was 75.5MB in the beginning and 111.1MB in the end (delta: 35.7MB). Free memory was 43.9MB in the beginning and 48.1MB in the end (delta: -4.2MB). Peak memory consumption was 61.1MB. Max. memory is 16.1GB. [2021-11-12 23:03:22,121 INFO L158 Benchmark]: Witness Printer took 61.00ms. Allocated memory is still 111.1MB. Free memory was 48.1MB in the beginning and 45.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:03:22,123 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 54.5MB. Free memory was 36.0MB in the beginning and 35.9MB in the end (delta: 38.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 236.91ms. Allocated memory was 54.5MB in the beginning and 75.5MB in the end (delta: 21.0MB). Free memory was 31.1MB in the beginning and 59.3MB in the end (delta: -28.3MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 78.96ms. Allocated memory is still 75.5MB. Free memory was 59.1MB in the beginning and 57.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.37ms. Allocated memory is still 75.5MB. Free memory was 57.6MB in the beginning and 56.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 367.74ms. Allocated memory is still 75.5MB. Free memory was 56.2MB in the beginning and 44.4MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 653861.30ms. Allocated memory was 75.5MB in the beginning and 111.1MB in the end (delta: 35.7MB). Free memory was 43.9MB in the beginning and 48.1MB in the end (delta: -4.2MB). Peak memory consumption was 61.1MB. Max. memory is 16.1GB. * Witness Printer took 61.00ms. Allocated memory is still 111.1MB. Free memory was 48.1MB in the beginning and 45.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 52]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 653.7s, OverallIterations: 8, TraceHistogramMax: 17, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 137.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 193.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 392 SdHoareTripleChecker+Valid, 3945.18ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 379 mSDsluCounter, 1658 SdHoareTripleChecker+Invalid, 3496.97ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 495 IncrementalHoareTripleChecker+Unchecked, 1509 mSDsCounter, 245 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1694 IncrementalHoareTripleChecker+Invalid, 2434 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 245 mSolverCounterUnsat, 149 mSDtfsCounter, 1694 mSolverCounterSat, 28.52ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1607 GetRequests, 1131 SyntacticMatches, 13 SemanticMatches, 463 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13762 ImplicationChecksByTransitivity, 425.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=6, InterpolantAutomatonStates: 277, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 182 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 53 NumberOfFragments, 275 HoareAnnotationTreeSize, 9 FomulaSimplifications, 28 FormulaSimplificationTreeSizeReduction, 0.7s HoareSimplificationTime, 7 FomulaSimplificationsInter, 63785 FormulaSimplificationTreeSizeReductionInter, 192.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 317.0s InterpolantComputationTime, 727 NumberOfCodeBlocks, 643 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1414 ConstructedInterpolants, 343 QuantifiedInterpolants, 23807 SizeOfPredicates, 263 NumberOfNonLiveVariables, 1905 ConjunctsInSsa, 548 ConjunctsInUnsatCore, 40 InterpolantComputations, 4 PerfectInterpolantSequences, 1918/3412 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((((pd2 == pd1 && unknown-#memory_int-unknown[pd2][~bvadd64(8bv32, pd2, ~bvmul32(i, 4bv32))] == i) && pd1 == pd2) && (!~bvslt32(~bvadd64(i, 1bv32), unknown-#memory_int-unknown[pa][pa]) || ~bvslt32(~bvadd64(i, 2bv32), unknown-#memory_int-unknown[pa][pa]))) && d1 == 0bv32) && !(\result == 0bv32)) || (((((pd2 == pd1 && !(d2 == d1)) && pd1 == pd2) && d2 == 0bv32) && d1 == 0bv32) && !(\result == 0bv32)) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 42]: Loop Invariant [2021-11-12 23:03:22,136 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] [2021-11-12 23:03:22,137 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] [2021-11-12 23:03:22,137 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] [2021-11-12 23:03:22,137 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] [2021-11-12 23:03:22,139 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] [2021-11-12 23:03:22,139 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] [2021-11-12 23:03:22,139 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] [2021-11-12 23:03:22,139 WARN L418 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[ULTIMATE.start_main_~i~0#1,QUANTIFIED] Derived loop invariant: (((((pd2 == pd1 && !(d2 == d1)) && pd1 == pd2) && d2 == 0bv32) && d1 == 0bv32) && (unknown-#memory_int-unknown[pd2][~bvadd64(8bv32, pd2, ~bvmul32(i, 4bv32))] == i || ~bvslt32(i, unknown-#memory_int-unknown[pa][pa]))) && (forall ULTIMATE.start_main_~i~0#1 : bv32 :: (~bvslt32(~bvadd64(ULTIMATE.start_main_~i~0#1, 1bv32), unknown-#memory_int-unknown[pa][pa]) || unknown-#memory_int-unknown[pd2][~bvadd64(pd2, ~bvmul32(ULTIMATE.start_main_~i~0#1, 4bv32), 12bv32)] == ~bvadd64(ULTIMATE.start_main_~i~0#1, 1bv32)) || !~bvslt32(ULTIMATE.start_main_~i~0#1, unknown-#memory_int-unknown[pa][pa])) - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-12 23:03:22,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2407a840-cd8e-49e1-8cab-4ad499834af3/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE