./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8 --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 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:34:43,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:34:43,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:34:43,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:34:43,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:34:43,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:34:43,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:34:43,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:34:43,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:34:43,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:34:43,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:34:43,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:34:43,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:34:43,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:34:43,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:34:43,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:34:43,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:34:43,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:34:43,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:34:43,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:34:44,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:34:44,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:34:44,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:34:44,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:34:44,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:34:44,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:34:44,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:34:44,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:34:44,027 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:34:44,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:34:44,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:34:44,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:34:44,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:34:44,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:34:44,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:34:44,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:34:44,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:34:44,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:34:44,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:34:44,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:34:44,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:34:44,045 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:34:44,102 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:34:44,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:34:44,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:34:44,105 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:34:44,105 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:34:44,105 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:34:44,105 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:34:44,106 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:34:44,114 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:34:44,114 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:34:44,115 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:34:44,116 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:34:44,116 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:34:44,116 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:34:44,117 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:34:44,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:34:44,118 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:34:44,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:34:44,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:34:44,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:34:44,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:34:44,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:34:44,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:34:44,119 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:34:44,119 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:34:44,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:34:44,120 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:34:44,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:34:44,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:34:44,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:34:44,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:44,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:34:44,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:34:44,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:34:44,124 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:34:44,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:34:44,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:34:44,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:34:44,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:34:44,125 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_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-11-07 01:34:44,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:34:44,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:34:44,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:34:44,565 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:34:44,566 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:34:44,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-07 01:34:44,658 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/data/1b10ab12b/2e001386794846aa9b83d89c95a2c235/FLAG636ac5361 [2021-11-07 01:34:45,269 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:34:45,270 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-07 01:34:45,284 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/data/1b10ab12b/2e001386794846aa9b83d89c95a2c235/FLAG636ac5361 [2021-11-07 01:34:45,622 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/data/1b10ab12b/2e001386794846aa9b83d89c95a2c235 [2021-11-07 01:34:45,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:34:45,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:34:45,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:45,634 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:34:45,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:34:45,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:45" (1/1) ... [2021-11-07 01:34:45,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d92d70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:45, skipping insertion in model container [2021-11-07 01:34:45,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:45" (1/1) ... [2021-11-07 01:34:45,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:34:45,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:34:45,930 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_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-07 01:34:45,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:45,977 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:34:45,995 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_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-07 01:34:46,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:46,024 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:34:46,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:46 WrapperNode [2021-11-07 01:34:46,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:46,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:34:46,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:34:46,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:34:46,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:46" (1/1) ... [2021-11-07 01:34:46,046 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:46" (1/1) ... [2021-11-07 01:34:46,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:34:46,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:34:46,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:34:46,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:34:46,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:46" (1/1) ... [2021-11-07 01:34:46,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:46" (1/1) ... [2021-11-07 01:34:46,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:46" (1/1) ... [2021-11-07 01:34:46,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:46" (1/1) ... [2021-11-07 01:34:46,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:46" (1/1) ... [2021-11-07 01:34:46,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:46" (1/1) ... [2021-11-07 01:34:46,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:46" (1/1) ... [2021-11-07 01:34:46,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:34:46,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:34:46,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:34:46,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:34:46,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:46" (1/1) ... [2021-11-07 01:34:46,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:46,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:34:46,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:34:46,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:34:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:34:46,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:34:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:34:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:34:46,523 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:34:46,523 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:34:46,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:34:46 BoogieIcfgContainer [2021-11-07 01:34:46,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:34:46,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:34:46,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:34:46,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:34:46,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:34:45" (1/3) ... [2021-11-07 01:34:46,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400b415e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:34:46, skipping insertion in model container [2021-11-07 01:34:46,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:46" (2/3) ... [2021-11-07 01:34:46,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400b415e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:34:46, skipping insertion in model container [2021-11-07 01:34:46,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:34:46" (3/3) ... [2021-11-07 01:34:46,541 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-11-07 01:34:46,546 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:34:46,546 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:34:46,606 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:34:46,613 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 [2021-11-07 01:34:46,613 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:34:46,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2021-11-07 01:34:46,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-07 01:34:46,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:46,635 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-07 01:34:46,636 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:46,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:46,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2065991, now seen corresponding path program 1 times [2021-11-07 01:34:46,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:34:46,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332950801] [2021-11-07 01:34:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:46,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:34:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:46,873 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:34:46,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332950801] [2021-11-07 01:34:46,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332950801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:46,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:46,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:34:46,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70417455] [2021-11-07 01:34:46,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:34:46,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:34:46,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:34:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:46,902 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-07 01:34:46,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:46,923 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-07 01:34:46,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:34:46,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) Word has length 4 [2021-11-07 01:34:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:46,932 INFO L225 Difference]: With dead ends: 13 [2021-11-07 01:34:46,933 INFO L226 Difference]: Without dead ends: 6 [2021-11-07 01:34:46,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:34:46,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-07 01:34:46,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-07 01:34:46,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-11-07 01:34:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-07 01:34:46,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-07 01:34:46,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:46,965 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-07 01:34:46,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-07 01:34:46,965 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-07 01:34:46,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-07 01:34:46,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:46,966 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-07 01:34:46,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:34:46,967 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash 64150435, now seen corresponding path program 1 times [2021-11-07 01:34:46,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:34:46,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586725120] [2021-11-07 01:34:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:46,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:34:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:47,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:34:47,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586725120] [2021-11-07 01:34:47,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586725120] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:34:47,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82511257] [2021-11-07 01:34:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:47,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:34:47,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:34:47,067 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:34:47,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:34:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:47,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:34:47,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:47,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:47,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82511257] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:47,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [585588163] [2021-11-07 01:34:47,257 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-07 01:34:47,257 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:34:47,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:34:47,269 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:34:47,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:34:47,322 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:47,336 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:34:47,337 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:47,339 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:34:47,340 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:34:47,341 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:47,342 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:34:47,348 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-07 01:34:47,375 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_9|], 21=[|v_#valid_10|]} [2021-11-07 01:34:47,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:47,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:47,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:47,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:34:47,421 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:47,423 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:34:47,424 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:47,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:34:47,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:34:47,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:47,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:47,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:47,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:47,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:47,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:47,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:47,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:47,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:47,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:47,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:47,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:34:47,557 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:47,565 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:34:47,566 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:47,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:34:47,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:34:47,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:47,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:47,592 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:47,594 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-07 01:34:47,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:34:47,596 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-07 01:34:47,605 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:47,614 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-07 01:34:47,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:47,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:47,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:47,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:47,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:47,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:47,806 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:47,882 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:34:47,886 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:47,901 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:34:47,918 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:47,951 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 150 [2021-11-07 01:34:47,958 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 150 [2021-11-07 01:34:47,962 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:34:47,973 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:47,984 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:34:47,989 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:48,011 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:34:48,015 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:48,029 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-11-07 01:34:48,044 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:34:48,049 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:48,057 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 52 [2021-11-07 01:34:48,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-11-07 01:34:48,069 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-11-07 01:34:48,070 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:34:48,072 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:48,078 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-11-07 01:34:48,086 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 201 [2021-11-07 01:34:48,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:48,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:48,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:48,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:48,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:48,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:48,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:48,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:48,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:48,246 INFO L180 QuantifierPusher]: treesize reduction 30, result has 70.0 percent of original size [2021-11-07 01:34:48,289 INFO L185 QuantifierPusher]: treesize reduction 5, result has 93.2 percent of original size 68 [2021-11-07 01:34:48,305 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:34:48,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:34:48,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:34:48,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-07 01:34:48,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889094226] [2021-11-07 01:34:48,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:34:48,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:34:48,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:34:48,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:34:48,792 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-11-07 01:34:48,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:48,854 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-07 01:34:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:34:48,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) Word has length 5 [2021-11-07 01:34:48,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:48,858 INFO L225 Difference]: With dead ends: 12 [2021-11-07 01:34:48,858 INFO L226 Difference]: Without dead ends: 9 [2021-11-07 01:34:48,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:34:48,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-07 01:34:48,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-07 01:34:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2021-11-07 01:34:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-07 01:34:48,863 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-07 01:34:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:48,863 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-07 01:34:48,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-11-07 01:34:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-07 01:34:48,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:34:48,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:48,865 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-07 01:34:48,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:49,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:34:49,066 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:49,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:49,067 INFO L85 PathProgramCache]: Analyzing trace with hash -50856633, now seen corresponding path program 2 times [2021-11-07 01:34:49,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:34:49,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002928329] [2021-11-07 01:34:49,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:49,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:34:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:49,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:34:49,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002928329] [2021-11-07 01:34:49,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002928329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:34:49,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308838789] [2021-11-07 01:34:49,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:34:49,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:34:49,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:34:49,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:34:49,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 01:34:49,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 01:34:49,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:34:49,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:34:49,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:49,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:49,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308838789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:49,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [963052744] [2021-11-07 01:34:49,828 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-07 01:34:49,828 INFO L166 IcfgInterpreter]: Building call graph [2021-11-07 01:34:49,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-07 01:34:49,829 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-07 01:34:49,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-07 01:34:49,836 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:49,838 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:34:49,842 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:49,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-07 01:34:49,851 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:34:49,851 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:49,852 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-07 01:34:49,855 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-11-07 01:34:49,867 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_10|], 21=[|v_#valid_11|]} [2021-11-07 01:34:49,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:49,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:49,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:49,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-07 01:34:49,894 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:49,895 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:34:49,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:49,898 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-07 01:34:49,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-07 01:34:49,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:49,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:49,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:49,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:49,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:49,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:49,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:49,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:49,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:49,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:49,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:49,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-07 01:34:49,953 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:49,961 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:34:49,962 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:49,963 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-07 01:34:49,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-07 01:34:49,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:49,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:49,975 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:49,977 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-11-07 01:34:49,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-07 01:34:49,979 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:122, output treesize:97 [2021-11-07 01:34:49,985 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:49,994 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 116 [2021-11-07 01:34:50,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:50,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:50,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:50,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:50,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:50,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:50,083 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:50,111 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:34:50,113 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:50,119 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:34:50,122 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:50,138 INFO L185 QuantifierPusher]: treesize reduction 8, result has 91.7 percent of original size 88 [2021-11-07 01:34:50,146 INFO L185 QuantifierPusher]: treesize reduction 8, result has 91.7 percent of original size 88 [2021-11-07 01:34:50,159 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-07 01:34:50,168 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:34:50,179 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-11-07 01:34:50,184 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 148 [2021-11-07 01:34:50,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:50,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:50,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:50,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:50,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:50,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:50,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:50,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:50,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-07 01:34:50,258 INFO L180 QuantifierPusher]: treesize reduction 30, result has 70.0 percent of original size [2021-11-07 01:34:50,273 INFO L185 QuantifierPusher]: treesize reduction 6, result has 90.9 percent of original size 60 [2021-11-07 01:34:50,284 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-07 01:34:50,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 01:34:50,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 01:34:50,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2021-11-07 01:34:50,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985546804] [2021-11-07 01:34:50,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:34:50,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:34:50,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:34:50,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:34:50,666 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 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) [2021-11-07 01:34:51,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:51,282 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-07 01:34:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:34:51,284 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 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) Word has length 8 [2021-11-07 01:34:51,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:51,285 INFO L225 Difference]: With dead ends: 18 [2021-11-07 01:34:51,285 INFO L226 Difference]: Without dead ends: 15 [2021-11-07 01:34:51,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:34:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-07 01:34:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-07 01:34:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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) [2021-11-07 01:34:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-07 01:34:51,291 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2021-11-07 01:34:51,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:51,292 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-07 01:34:51,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 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) [2021-11-07 01:34:51,292 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-07 01:34:51,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 01:34:51,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:51,293 INFO L513 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2021-11-07 01:34:51,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:51,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:34:51,519 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:51,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1522332743, now seen corresponding path program 3 times [2021-11-07 01:34:51,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:34:51,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284480732] [2021-11-07 01:34:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:51,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:34:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:34:51,585 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 01:34:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:34:51,656 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-07 01:34:51,656 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 01:34:51,658 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-07 01:34:51,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-07 01:34:51,670 INFO L731 BasicCegarLoop]: Path program histogram: [3, 1] [2021-11-07 01:34:51,672 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:34:51,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:34:51 BoogieIcfgContainer [2021-11-07 01:34:51,702 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:34:51,702 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:34:51,702 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:34:51,703 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:34:51,703 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:34:46" (3/4) ... [2021-11-07 01:34:51,711 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 01:34:51,711 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:34:51,713 INFO L168 Benchmark]: Toolchain (without parser) took 6080.84 ms. Allocated memory was 140.5 MB in the beginning and 169.9 MB in the end (delta: 29.4 MB). Free memory was 101.3 MB in the beginning and 82.6 MB in the end (delta: 18.6 MB). Peak memory consumption was 48.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:51,716 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 110.2 MB in the beginning and 110.2 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:34:51,717 INFO L168 Benchmark]: CACSL2BoogieTranslator took 392.24 ms. Allocated memory is still 140.5 MB. Free memory was 101.3 MB in the beginning and 112.8 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:51,718 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.92 ms. Allocated memory is still 140.5 MB. Free memory was 112.3 MB in the beginning and 110.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:51,720 INFO L168 Benchmark]: Boogie Preprocessor took 39.86 ms. Allocated memory is still 140.5 MB. Free memory was 110.7 MB in the beginning and 110.2 MB in the end (delta: 533.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:34:51,721 INFO L168 Benchmark]: RCFGBuilder took 413.51 ms. Allocated memory is still 140.5 MB. Free memory was 110.2 MB in the beginning and 98.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:51,723 INFO L168 Benchmark]: TraceAbstraction took 5174.26 ms. Allocated memory was 140.5 MB in the beginning and 169.9 MB in the end (delta: 29.4 MB). Free memory was 98.2 MB in the beginning and 82.6 MB in the end (delta: 15.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:34:51,723 INFO L168 Benchmark]: Witness Printer took 9.14 ms. Allocated memory is still 169.9 MB. Free memory is still 82.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:34:51,730 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 110.2 MB in the beginning and 110.2 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 392.24 ms. Allocated memory is still 140.5 MB. Free memory was 101.3 MB in the beginning and 112.8 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.92 ms. Allocated memory is still 140.5 MB. Free memory was 112.3 MB in the beginning and 110.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.86 ms. Allocated memory is still 140.5 MB. Free memory was 110.7 MB in the beginning and 110.2 MB in the end (delta: 533.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 413.51 ms. Allocated memory is still 140.5 MB. Free memory was 110.2 MB in the beginning and 98.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5174.26 ms. Allocated memory was 140.5 MB in the beginning and 169.9 MB in the end (delta: 29.4 MB). Free memory was 98.2 MB in the beginning and 82.6 MB in the end (delta: 15.5 MB). Peak memory consumption was 46.5 MB. Max. memory is 16.1 GB. * Witness Printer took 9.14 ms. Allocated memory is still 169.9 MB. Free memory is still 82.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * 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 - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 31, overapproximation of bitwiseAnd at line 32. Possible FailurePath: [L24] unsigned char x = __VERIFIER_nondet_uchar(); [L25] unsigned char y; [L26] unsigned char c; [L28] y = 0 [L29] c = 0 [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND TRUE bit != (unsigned char)0 [L34] y = y + i [L36] c = c + ((unsigned char)1) [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND TRUE bit != (unsigned char)0 [L34] y = y + i [L36] c = c + ((unsigned char)1) [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; [L33] COND FALSE !(bit != (unsigned char)0) [L36] c = c + ((unsigned char)1) [L30] COND FALSE !(c < (unsigned char)8) [L15] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.0s, OverallIterations: 4, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 9 SDslu, 18 SDs, 0 SdLazy, 51 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 228 SizeOfPredicates, 4 NumberOfNonLiveVariables, 106 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 01:34:51,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8 --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 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:34:54,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:34:54,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:34:54,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:34:54,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:34:54,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:34:54,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:34:54,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:34:54,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:34:54,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:34:54,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:34:54,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:34:54,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:34:54,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:34:54,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:34:54,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:34:54,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:34:55,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:34:55,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:34:55,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:34:55,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:34:55,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:34:55,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:34:55,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:34:55,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:34:55,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:34:55,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:34:55,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:34:55,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:34:55,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:34:55,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:34:55,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:34:55,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:34:55,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:34:55,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:34:55,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:34:55,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:34:55,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:34:55,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:34:55,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:34:55,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:34:55,053 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:34:55,103 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:34:55,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:34:55,106 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:34:55,106 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:34:55,106 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:34:55,107 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:34:55,107 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:34:55,107 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:34:55,108 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:34:55,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:34:55,111 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:34:55,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:34:55,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:34:55,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:34:55,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:34:55,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:34:55,113 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:34:55,113 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:34:55,114 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:34:55,114 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:34:55,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:34:55,114 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:34:55,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:34:55,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:34:55,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:34:55,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:34:55,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:55,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:34:55,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:34:55,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:34:55,117 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:34:55,117 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:55,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:34:55,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:34:55,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:34:55,119 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_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-11-07 01:34:55,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:34:55,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:34:55,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:34:55,688 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:34:55,689 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:34:55,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-07 01:34:55,779 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/data/71a205254/8ecb4bc1bc0b4abe83dcb3b85388bd17/FLAG339ea8030 [2021-11-07 01:34:56,513 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:34:56,514 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-11-07 01:34:56,522 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/data/71a205254/8ecb4bc1bc0b4abe83dcb3b85388bd17/FLAG339ea8030 [2021-11-07 01:34:56,869 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/data/71a205254/8ecb4bc1bc0b4abe83dcb3b85388bd17 [2021-11-07 01:34:56,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:34:56,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:34:56,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:56,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:34:56,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:34:56,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:56" (1/1) ... [2021-11-07 01:34:56,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d999cd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:56, skipping insertion in model container [2021-11-07 01:34:56,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:34:56" (1/1) ... [2021-11-07 01:34:56,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:34:56,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:34:57,115 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_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-07 01:34:57,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:57,180 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:34:57,200 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_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2021-11-07 01:34:57,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:34:57,248 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:34:57,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:57 WrapperNode [2021-11-07 01:34:57,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:34:57,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:34:57,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:34:57,252 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:34:57,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:57" (1/1) ... [2021-11-07 01:34:57,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:57" (1/1) ... [2021-11-07 01:34:57,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:34:57,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:34:57,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:34:57,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:34:57,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:57" (1/1) ... [2021-11-07 01:34:57,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:57" (1/1) ... [2021-11-07 01:34:57,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:57" (1/1) ... [2021-11-07 01:34:57,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:57" (1/1) ... [2021-11-07 01:34:57,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:57" (1/1) ... [2021-11-07 01:34:57,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:57" (1/1) ... [2021-11-07 01:34:57,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:57" (1/1) ... [2021-11-07 01:34:57,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:34:57,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:34:57,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:34:57,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:34:57,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:57" (1/1) ... [2021-11-07 01:34:57,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:34:57,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:34:57,408 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:34:57,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:34:57,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:34:57,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:34:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:34:57,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:34:57,840 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:34:57,847 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:34:57,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:34:57 BoogieIcfgContainer [2021-11-07 01:34:57,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:34:57,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:34:57,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:34:57,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:34:57,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:34:56" (1/3) ... [2021-11-07 01:34:57,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b9803f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:34:57, skipping insertion in model container [2021-11-07 01:34:57,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:34:57" (2/3) ... [2021-11-07 01:34:57,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73b9803f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:34:57, skipping insertion in model container [2021-11-07 01:34:57,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:34:57" (3/3) ... [2021-11-07 01:34:57,863 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-11-07 01:34:57,870 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:34:57,870 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:34:57,948 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:34:57,961 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 [2021-11-07 01:34:57,961 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:34:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2021-11-07 01:34:58,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:34:58,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:58,003 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:34:58,004 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:58,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:58,012 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-11-07 01:34:58,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:58,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706384775] [2021-11-07 01:34:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:58,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:58,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:58,034 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:58,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:34:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:58,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:34:58,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:58,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:58,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:58,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706384775] [2021-11-07 01:34:58,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706384775] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:58,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:58,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:34:58,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114868547] [2021-11-07 01:34:58,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:34:58,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:58,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:34:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:34:58,287 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-07 01:34:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:58,301 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-07 01:34:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:34:58,303 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) Word has length 6 [2021-11-07 01:34:58,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:58,311 INFO L225 Difference]: With dead ends: 21 [2021-11-07 01:34:58,312 INFO L226 Difference]: Without dead ends: 9 [2021-11-07 01:34:58,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:34:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-07 01:34:58,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-07 01:34:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-11-07 01:34:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-07 01:34:58,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-11-07 01:34:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:58,345 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-07 01:34:58,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-07 01:34:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-07 01:34:58,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 01:34:58,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:58,347 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 01:34:58,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:58,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:58,565 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:58,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:58,566 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-11-07 01:34:58,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:58,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765863354] [2021-11-07 01:34:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:58,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:58,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:58,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:58,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:34:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:58,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:34:58,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:58,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:58,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:58,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765863354] [2021-11-07 01:34:58,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765863354] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:34:58,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:34:58,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:34:58,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075390398] [2021-11-07 01:34:58,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:34:58,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:58,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:34:58,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:58,743 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-07 01:34:58,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:58,778 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-11-07 01:34:58,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:34:58,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) Word has length 6 [2021-11-07 01:34:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:58,781 INFO L225 Difference]: With dead ends: 17 [2021-11-07 01:34:58,781 INFO L226 Difference]: Without dead ends: 13 [2021-11-07 01:34:58,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:34:58,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-07 01:34:58,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-07 01:34:58,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2021-11-07 01:34:58,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-07 01:34:58,792 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 6 [2021-11-07 01:34:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:58,795 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-07 01:34:58,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-07 01:34:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-07 01:34:58,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 01:34:58,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:58,799 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:58,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:34:59,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:59,014 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:59,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1950053902, now seen corresponding path program 1 times [2021-11-07 01:34:59,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:59,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674780066] [2021-11-07 01:34:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:59,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:59,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:59,025 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:59,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:34:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:59,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:34:59,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:59,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:59,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:34:59,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674780066] [2021-11-07 01:34:59,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674780066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:59,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1804833195] [2021-11-07 01:34:59,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:59,249 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:34:59,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:34:59,274 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:34:59,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-07 01:34:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:59,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:34:59,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:59,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:59,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1804833195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:59,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204502692] [2021-11-07 01:34:59,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:59,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:34:59,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:34:59,646 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:34:59,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 01:34:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:59,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:34:59,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:59,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:34:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:34:59,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204502692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:34:59,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:34:59,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 10 [2021-11-07 01:34:59,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322597093] [2021-11-07 01:34:59,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:34:59,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:34:59,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:34:59,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:34:59,979 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 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) [2021-11-07 01:35:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:00,124 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-07 01:35:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:35:00,125 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 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) Word has length 12 [2021-11-07 01:35:00,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:00,127 INFO L225 Difference]: With dead ends: 29 [2021-11-07 01:35:00,127 INFO L226 Difference]: Without dead ends: 25 [2021-11-07 01:35:00,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:35:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-07 01:35:00,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-07 01:35:00,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 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) [2021-11-07 01:35:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-11-07 01:35:00,147 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 12 [2021-11-07 01:35:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:00,148 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-11-07 01:35:00,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 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) [2021-11-07 01:35:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-11-07 01:35:00,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 01:35:00,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:00,151 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:00,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:00,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:00,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:00,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:35:00,764 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:00,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1786738894, now seen corresponding path program 2 times [2021-11-07 01:35:00,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:00,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231615820] [2021-11-07 01:35:00,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:35:00,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:00,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:00,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:00,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:35:00,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:35:00,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:35:00,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:35:00,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:01,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:01,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:01,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231615820] [2021-11-07 01:35:01,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231615820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:01,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1249067652] [2021-11-07 01:35:01,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:35:01,248 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:01,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:35:01,250 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:35:01,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:35:01,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:35:01,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:35:01,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:35:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:01,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:01,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1249067652] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:01,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38039588] [2021-11-07 01:35:01,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:35:01,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:35:01,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:35:01,588 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:35:01,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 01:35:01,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:35:01,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:35:01,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:35:01,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:01,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:02,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38039588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:02,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:35:02,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 10] total 22 [2021-11-07 01:35:02,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235150561] [2021-11-07 01:35:02,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 01:35:02,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:02,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 01:35:02,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:35:02,220 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 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) [2021-11-07 01:35:02,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:35:02,761 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2021-11-07 01:35:02,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 01:35:02,762 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 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) Word has length 24 [2021-11-07 01:35:02,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:35:02,764 INFO L225 Difference]: With dead ends: 53 [2021-11-07 01:35:02,764 INFO L226 Difference]: Without dead ends: 49 [2021-11-07 01:35:02,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2021-11-07 01:35:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-07 01:35:02,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-07 01:35:02,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 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) [2021-11-07 01:35:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2021-11-07 01:35:02,775 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 24 [2021-11-07 01:35:02,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:35:02,776 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2021-11-07 01:35:02,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 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) [2021-11-07 01:35:02,777 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2021-11-07 01:35:02,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:35:02,778 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:35:02,779 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-07 01:35:02,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:03,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-07 01:35:03,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:35:03,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:03,394 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:35:03,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:35:03,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2021-11-07 01:35:03,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:35:03,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478339679] [2021-11-07 01:35:03,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:35:03,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:35:03,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:35:03,397 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:35:03,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:35:03,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 01:35:03,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:35:03,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 01:35:03,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:08,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:13,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:35:13,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478339679] [2021-11-07 01:35:13,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478339679] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:13,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1830057396] [2021-11-07 01:35:13,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:35:13,616 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:35:13,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:35:13,617 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:35:13,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 01:35:13,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 01:35:13,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:35:13,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 01:35:13,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:15,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:17,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1830057396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:17,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400537322] [2021-11-07 01:35:17,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:35:17,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:35:17,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:35:17,406 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:35:17,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 01:35:17,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 01:35:17,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:35:17,775 WARN L261 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-07 01:35:17,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:35:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:21,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:35:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:35:24,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400537322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:35:24,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:35:24,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 82 [2021-11-07 01:35:24,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631427933] [2021-11-07 01:35:24,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-07 01:35:24,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:35:24,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-07 01:35:24,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1741, Invalid=4901, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 01:35:24,943 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 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) [2021-11-07 01:36:21,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:36:21,603 INFO L93 Difference]: Finished difference Result 388 states and 518 transitions. [2021-11-07 01:36:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-07 01:36:21,604 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 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) Word has length 30 [2021-11-07 01:36:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:36:21,612 INFO L225 Difference]: With dead ends: 388 [2021-11-07 01:36:21,612 INFO L226 Difference]: Without dead ends: 360 [2021-11-07 01:36:21,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 11908 ImplicationChecksByTransitivity, 65.1s TimeCoverageRelationStatistics Valid=7865, Invalid=22585, Unknown=0, NotChecked=0, Total=30450 [2021-11-07 01:36:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-07 01:36:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 194. [2021-11-07 01:36:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.3575129533678756) internal successors, (262), 193 states have internal predecessors, (262), 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) [2021-11-07 01:36:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 262 transitions. [2021-11-07 01:36:21,666 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 262 transitions. Word has length 30 [2021-11-07 01:36:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:36:21,666 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 262 transitions. [2021-11-07 01:36:21,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 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) [2021-11-07 01:36:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 262 transitions. [2021-11-07 01:36:21,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:36:21,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:36:21,669 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:36:21,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:21,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:36:22,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-07 01:36:22,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:36:22,275 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:36:22,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:36:22,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1777786732, now seen corresponding path program 1 times [2021-11-07 01:36:22,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:36:22,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378937983] [2021-11-07 01:36:22,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:22,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:36:22,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:36:22,278 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:36:22,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:36:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:22,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 01:36:22,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:24,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:27,417 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:36:27,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378937983] [2021-11-07 01:36:27,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378937983] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:27,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1892843400] [2021-11-07 01:36:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:27,419 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:36:27,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:36:27,436 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:36:27,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 01:36:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:28,035 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 01:36:28,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:28,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:29,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1892843400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:29,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666119982] [2021-11-07 01:36:29,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:36:29,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:36:29,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:36:29,444 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:36:29,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 01:36:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:36:30,061 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 01:36:30,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:36:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:31,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:36:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:36:36,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666119982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:36:36,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:36:36,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-07 01:36:36,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291884738] [2021-11-07 01:36:36,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-07 01:36:36,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:36:36,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-07 01:36:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1214, Invalid=5106, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 01:36:36,372 INFO L87 Difference]: Start difference. First operand 194 states and 262 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-07 01:37:25,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:25,801 INFO L93 Difference]: Finished difference Result 448 states and 593 transitions. [2021-11-07 01:37:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-07 01:37:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) Word has length 30 [2021-11-07 01:37:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:25,805 INFO L225 Difference]: With dead ends: 448 [2021-11-07 01:37:25,805 INFO L226 Difference]: Without dead ends: 351 [2021-11-07 01:37:25,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7116 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=4666, Invalid=20774, Unknown=0, NotChecked=0, Total=25440 [2021-11-07 01:37:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-07 01:37:25,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2021-11-07 01:37:25,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.358744394618834) internal successors, (303), 223 states have internal predecessors, (303), 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) [2021-11-07 01:37:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 303 transitions. [2021-11-07 01:37:25,855 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 303 transitions. Word has length 30 [2021-11-07 01:37:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:25,856 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 303 transitions. [2021-11-07 01:37:25,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-07 01:37:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 303 transitions. [2021-11-07 01:37:25,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:37:25,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:25,858 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:25,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-07 01:37:26,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:37:26,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:26,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:26,463 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:26,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:26,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1894380496, now seen corresponding path program 2 times [2021-11-07 01:37:26,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:26,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287314422] [2021-11-07 01:37:26,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:37:26,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:26,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:26,465 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:26,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:37:27,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:37:27,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:37:27,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 01:37:27,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:28,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:31,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:31,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287314422] [2021-11-07 01:37:31,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287314422] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:31,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [49695399] [2021-11-07 01:37:31,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:37:31,861 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:31,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:37:31,863 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:37:31,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:37:32,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:37:32,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:37:32,820 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 01:37:32,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:33,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:34,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [49695399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:34,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129413774] [2021-11-07 01:37:34,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:37:34,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:37:34,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:37:34,496 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:37:34,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 01:37:35,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:37:35,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:37:35,410 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 01:37:35,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:36,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:42,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129413774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:37:42,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:37:42,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-07 01:37:42,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773568701] [2021-11-07 01:37:42,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-07 01:37:42,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:42,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-07 01:37:42,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=5156, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 01:37:42,192 INFO L87 Difference]: Start difference. First operand 224 states and 303 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-07 01:39:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:24,560 INFO L93 Difference]: Finished difference Result 643 states and 860 transitions. [2021-11-07 01:39:24,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2021-11-07 01:39:24,560 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) Word has length 30 [2021-11-07 01:39:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:24,564 INFO L225 Difference]: With dead ends: 643 [2021-11-07 01:39:24,565 INFO L226 Difference]: Without dead ends: 549 [2021-11-07 01:39:24,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20490 ImplicationChecksByTransitivity, 105.6s TimeCoverageRelationStatistics Valid=10238, Invalid=55042, Unknown=0, NotChecked=0, Total=65280 [2021-11-07 01:39:24,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-11-07 01:39:24,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 266. [2021-11-07 01:39:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.3547169811320754) internal successors, (359), 265 states have internal predecessors, (359), 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) [2021-11-07 01:39:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 359 transitions. [2021-11-07 01:39:24,632 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 359 transitions. Word has length 30 [2021-11-07 01:39:24,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:24,632 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 359 transitions. [2021-11-07 01:39:24,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-07 01:39:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 359 transitions. [2021-11-07 01:39:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:39:24,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:24,635 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:24,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:24,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:25,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:25,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:39:25,238 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:39:25,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:25,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1978693868, now seen corresponding path program 3 times [2021-11-07 01:39:25,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:25,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840083270] [2021-11-07 01:39:25,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:39:25,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:25,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:25,240 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:25,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:39:26,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 01:39:26,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:39:26,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 01:39:26,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:28,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:34,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:34,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840083270] [2021-11-07 01:39:34,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840083270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:34,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [405446397] [2021-11-07 01:39:34,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:39:34,439 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:34,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:39:34,440 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:39:34,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 01:39:35,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 01:39:35,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:39:35,792 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 01:39:35,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:37,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:38,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [405446397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:38,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550843239] [2021-11-07 01:39:38,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:39:38,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:39:38,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:38,475 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:39:38,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 01:39:39,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 01:39:39,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:39:39,772 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 01:39:39,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:42,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:46,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550843239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:46,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:39:46,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 83 [2021-11-07 01:39:46,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091705585] [2021-11-07 01:39:46,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-07 01:39:46,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:46,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-07 01:39:46,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1407, Invalid=5399, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 01:39:46,951 INFO L87 Difference]: Start difference. First operand 266 states and 359 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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) [2021-11-07 01:41:05,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:05,549 INFO L93 Difference]: Finished difference Result 740 states and 983 transitions. [2021-11-07 01:41:05,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-11-07 01:41:05,549 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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) Word has length 30 [2021-11-07 01:41:05,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:05,554 INFO L225 Difference]: With dead ends: 740 [2021-11-07 01:41:05,554 INFO L226 Difference]: Without dead ends: 648 [2021-11-07 01:41:05,558 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14808 ImplicationChecksByTransitivity, 84.4s TimeCoverageRelationStatistics Valid=8675, Invalid=32331, Unknown=0, NotChecked=0, Total=41006 [2021-11-07 01:41:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-07 01:41:05,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 422. [2021-11-07 01:41:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.3562945368171022) internal successors, (571), 421 states have internal predecessors, (571), 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) [2021-11-07 01:41:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 571 transitions. [2021-11-07 01:41:05,654 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 571 transitions. Word has length 30 [2021-11-07 01:41:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:05,654 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 571 transitions. [2021-11-07 01:41:05,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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) [2021-11-07 01:41:05,655 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 571 transitions. [2021-11-07 01:41:05,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:41:05,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:05,658 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:05,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:05,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-07 01:41:06,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-07 01:41:06,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:06,285 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:06,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:06,285 INFO L85 PathProgramCache]: Analyzing trace with hash -2035952170, now seen corresponding path program 4 times [2021-11-07 01:41:06,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:06,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965495895] [2021-11-07 01:41:06,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:41:06,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:06,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:06,287 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:06,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:41:07,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:41:07,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:41:07,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 01:41:07,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:08,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:13,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:13,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965495895] [2021-11-07 01:41:13,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965495895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:13,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1943144624] [2021-11-07 01:41:13,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:41:13,038 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:13,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:41:13,041 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:41:13,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:41:14,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:41:14,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:41:14,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 01:41:14,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:15,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:16,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1943144624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:16,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193057361] [2021-11-07 01:41:16,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:41:16,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:41:16,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:41:16,381 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:41:16,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 01:41:17,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:41:17,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:41:17,971 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 01:41:17,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:19,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:25,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193057361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:41:25,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:41:25,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-07 01:41:25,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097757080] [2021-11-07 01:41:25,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-07 01:41:25,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:25,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-07 01:41:25,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=5140, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 01:41:25,639 INFO L87 Difference]: Start difference. First operand 422 states and 571 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-07 01:42:52,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:52,612 INFO L93 Difference]: Finished difference Result 816 states and 1091 transitions. [2021-11-07 01:42:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-11-07 01:42:52,613 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) Word has length 30 [2021-11-07 01:42:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:52,617 INFO L225 Difference]: With dead ends: 816 [2021-11-07 01:42:52,617 INFO L226 Difference]: Without dead ends: 690 [2021-11-07 01:42:52,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12037 ImplicationChecksByTransitivity, 90.6s TimeCoverageRelationStatistics Valid=6460, Invalid=35770, Unknown=0, NotChecked=0, Total=42230 [2021-11-07 01:42:52,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-07 01:42:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 521. [2021-11-07 01:42:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.3615384615384616) internal successors, (708), 520 states have internal predecessors, (708), 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) [2021-11-07 01:42:52,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 708 transitions. [2021-11-07 01:42:52,735 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 708 transitions. Word has length 30 [2021-11-07 01:42:52,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:52,735 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 708 transitions. [2021-11-07 01:42:52,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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) [2021-11-07 01:42:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 708 transitions. [2021-11-07 01:42:52,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:42:52,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:52,737 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:52,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:52,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 01:42:53,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-07 01:42:53,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:42:53,343 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:42:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:53,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1636215058, now seen corresponding path program 5 times [2021-11-07 01:42:53,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:53,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216028151] [2021-11-07 01:42:53,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:42:53,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:53,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:53,348 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:53,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:42:54,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-07 01:42:54,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:42:54,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 01:42:54,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:56,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:00,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:00,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216028151] [2021-11-07 01:43:00,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216028151] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:00,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [967131567] [2021-11-07 01:43:00,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:43:00,571 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:43:00,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:43:00,572 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:43:00,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:43:02,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-07 01:43:02,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:43:02,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 01:43:02,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:03,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:04,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [967131567] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:04,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230108235] [2021-11-07 01:43:04,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:43:04,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:43:04,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:43:04,562 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:43:04,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 01:43:06,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-07 01:43:06,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:43:06,362 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 01:43:06,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:07,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:12,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230108235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:43:12,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:43:12,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-07 01:43:12,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589384440] [2021-11-07 01:43:12,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-07 01:43:12,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:12,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-07 01:43:12,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=5140, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 01:43:12,699 INFO L87 Difference]: Start difference. First operand 521 states and 708 transitions. Second operand has 80 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 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) [2021-11-07 01:44:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:34,568 INFO L93 Difference]: Finished difference Result 869 states and 1168 transitions. [2021-11-07 01:44:34,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-11-07 01:44:34,568 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 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) Word has length 30 [2021-11-07 01:44:34,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:34,572 INFO L225 Difference]: With dead ends: 869 [2021-11-07 01:44:34,573 INFO L226 Difference]: Without dead ends: 737 [2021-11-07 01:44:34,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13499 ImplicationChecksByTransitivity, 86.5s TimeCoverageRelationStatistics Valid=7480, Invalid=38530, Unknown=0, NotChecked=0, Total=46010 [2021-11-07 01:44:34,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-11-07 01:44:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 544. [2021-11-07 01:44:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 1.3609576427255985) internal successors, (739), 543 states have internal predecessors, (739), 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) [2021-11-07 01:44:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 739 transitions. [2021-11-07 01:44:34,679 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 739 transitions. Word has length 30 [2021-11-07 01:44:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:34,679 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 739 transitions. [2021-11-07 01:44:34,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1125) internal successors, (89), 80 states have internal predecessors, (89), 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) [2021-11-07 01:44:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 739 transitions. [2021-11-07 01:44:34,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:44:34,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:34,681 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:34,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:34,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-07 01:44:35,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:35,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:35,287 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:35,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:35,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1578956756, now seen corresponding path program 6 times [2021-11-07 01:44:35,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:35,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145076152] [2021-11-07 01:44:35,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:44:35,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:35,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:35,289 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:35,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:44:36,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-07 01:44:36,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:36,864 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 01:44:36,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:38,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:42,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:42,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145076152] [2021-11-07 01:44:42,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145076152] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:42,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [65077351] [2021-11-07 01:44:42,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:44:42,826 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:42,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:44:42,827 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:44:42,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:44:45,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-07 01:44:45,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:45,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 01:44:45,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:45,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:47,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [65077351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:47,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053546891] [2021-11-07 01:44:47,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:44:47,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:44:47,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:47,117 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:44:47,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 01:44:49,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-07 01:44:49,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:44:49,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 01:44:49,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:50,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:56,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053546891] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:44:56,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:44:56,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 83 [2021-11-07 01:44:56,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956244528] [2021-11-07 01:44:56,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-07 01:44:56,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:56,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-07 01:44:56,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1274, Invalid=5532, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 01:44:56,080 INFO L87 Difference]: Start difference. First operand 544 states and 739 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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) [2021-11-07 01:46:56,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:56,908 INFO L93 Difference]: Finished difference Result 942 states and 1258 transitions. [2021-11-07 01:46:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-11-07 01:46:56,909 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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) Word has length 30 [2021-11-07 01:46:56,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:56,913 INFO L225 Difference]: With dead ends: 942 [2021-11-07 01:46:56,913 INFO L226 Difference]: Without dead ends: 789 [2021-11-07 01:46:56,917 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 16786 ImplicationChecksByTransitivity, 121.0s TimeCoverageRelationStatistics Valid=6841, Invalid=45371, Unknown=0, NotChecked=0, Total=52212 [2021-11-07 01:46:56,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-11-07 01:46:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 629. [2021-11-07 01:46:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.372611464968153) internal successors, (862), 628 states have internal predecessors, (862), 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) [2021-11-07 01:46:57,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 862 transitions. [2021-11-07 01:46:57,071 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 862 transitions. Word has length 30 [2021-11-07 01:46:57,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:57,071 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 862 transitions. [2021-11-07 01:46:57,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 83 states have internal predecessors, (89), 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) [2021-11-07 01:46:57,072 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 862 transitions. [2021-11-07 01:46:57,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:46:57,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:57,073 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:57,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-07 01:46:57,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:57,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-07 01:46:57,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:57,686 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:46:57,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:57,687 INFO L85 PathProgramCache]: Analyzing trace with hash -497923054, now seen corresponding path program 7 times [2021-11-07 01:46:57,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:57,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973127051] [2021-11-07 01:46:57,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:46:57,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:57,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:57,688 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:57,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:46:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:59,431 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 01:46:59,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:00,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:04,259 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:04,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973127051] [2021-11-07 01:47:04,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973127051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:04,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1093458136] [2021-11-07 01:47:04,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:47:04,260 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:04,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:47:04,260 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:47:04,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:47:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:06,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 01:47:06,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:07,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:08,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1093458136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:08,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849732766] [2021-11-07 01:47:08,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:47:08,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:47:08,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:47:08,165 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:47:08,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1e5ea19-0d6a-47e8-9a7a-8de1fcdc3f0d/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 01:47:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:10,501 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 01:47:10,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:11,386 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:11,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:16,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849732766] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:16,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:47:16,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 29, 29] total 80 [2021-11-07 01:47:16,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691237924] [2021-11-07 01:47:16,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-07 01:47:16,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:16,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-07 01:47:16,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=5139, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 01:47:16,768 INFO L87 Difference]: Start difference. First operand 629 states and 862 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 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)